what is the ph of a solution of 0.20 m hno2 containing 0.10 m nano2 at 25°c, given ka of hno2 is 4.5 × 10–4?

Answers

Answer 1

The pH of the solution of 0.20 m hno2 containing 0.10 m nano2 at 25°c is approximately 3.05.

To find the pH of the solution containing 0.20 M HNO₂ and 0.10 M NaNO₂ at 25°C, we'll use the Henderson-Hasselbalch equation. Here's a step-by-step explanation:
1. Identify the Ka value of HNO₂, which is given as 4.5 × 10⁻⁴.
2. Calculate the pKa using the formula: pKa = -log(Ka)
  pKa = -log(4.5 × 10⁻⁴) ≈ 3.35
3. Identify the concentrations of the acid (HNO₂) and its conjugate base (NO₂⁻), which are 0.20 M and 0.10 M, respectively.
4. Apply the Henderson-Hasselbalch equation: pH = pKa + log([A⁻]/[HA])
  pH = 3.35 + log(0.10/0.20)
5. Calculate the pH:
  pH = 3.35 + log(0.5) ≈ 3.35 - 0.3 = 3.05

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Related Questions



Anita was using steel to make rusted sculptures. After building each sculpture, she caused the steel in the sculpture to rust by placing it into a tub filled

with salt water for eight hours. Anita wondered if steel would rust faster submerged in vinegar instead of salt water. To find out, Anita cut ten squares of

steel sheet metal and split them into two equal groups. She put one group of squares into a tub filled with salt water and the other group of squares

into a tub filled with vinegar. Once an hour for eight hours, Anita counted the number of rusted steel squares in each group.

What is the manipulated independent variable in Anita's experiment?

Answers

Answer:

The type of liquid in the tub (salt water or vinegar)

Explanation:

The manipulated independent variable in Anita's experiment is the type of liquid in the tub.

The independent variable is the controlled or manipulated variable in the course of an experiment. It can also be referred to as the 'cause' variable which has the capacity to produce 'effects' on another variable - the dependent variable.

In this case, the type of liquid the tub is filled (salt water or vinegar) will hypothetically affect the rusting period of the steel. Hence, the dependent variable is the type of liquid the tub is filled while the dependent variable would be the time it takes for the steel to get rusted.

Nitrogen boils at -195°C, because it is normally a gas at room temperature. At -250°C, it is a: solid, liquid, gas

Nitrogen boils at -195C, because it is normally a gas at room temperature. At -250C, it is a: solid,

Answers

gas
i think
sorry if i made you get it wrong :/

Answer:

i think its liquid because they is liquid nitrogen and the gas but i think its liquid

Chemical element Number of atoms in reactants

Number of atoms in products

Answers

The number of atoms in reactants is equal to the number of an atom in the products.

According to the chemical properties, the reaction must be balanced, and the balanced chemical equation is known as a balance chemical reaction, and in the chemical equation, the number of atoms in the reactant equals the number of atoms in the products.

When Sodium hydroxide( NaOH) reacts with Hydrogen chloride ( HCl) it form sodium chloride ( NaCl) and water ( H₂O). As the equation is shown below

NaOH + HCl  → NaCl + H₂O

here the number of sodium atoms in the reactant is one, and in the product, it is also 1, whereas chloride atoms in the reactant are 1 and similar in the product. Similarly, hydrogen and oxygen have 2 and 1 atoms in reactions respectively, and the same in the product. Hence equation is balanced.

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Help please ASAP!!!!!!

Help please ASAP!!!!!!

Answers

Answer:

which subjet is this math science or history

What kind of energy is produced from moving water?

Answers

Answer:

When flowing water is captured and turned into electricity, it is called hydroelectric power or hydropower. There are several types of hydroelectric facilities; they are all powered by the kinetic energy of flowing water as it moves downstream.

Explanation:

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I HOPE THIS HELPS! :)

Elements that are in the same ________ have a tendency to have very similar chemical properties due to periodic trends. textbook period row compound group

Answers

Elements that are in the same group have a tendency to have very similar chemical properties due to periodic trends.

The periodic table is organized into groups (also known as families or columns) and periods (also known as rows). Elements within the same group share similar chemical properties because they have the same number of valence electrons. Valence electrons are the electrons in the outermost energy level of an atom and play a crucial role in determining an element's chemical behavior.

The periodic table is arranged in such a way that elements in the same group have the same number of valence electrons, leading to similar chemical properties. For example, elements in Group 1 (such as hydrogen, lithium, sodium, and potassium) all have one valence electron, which makes them highly reactive metals that readily lose that electron to form positive ions. Similarly, elements in Group 17 (such as fluorine, chlorine, bromine, and iodine) all have seven valence electrons, making them highly reactive nonmetals that readily gain one electron to achieve a stable electron configuration.

Periodic trends, such as atomic radius, ionization energy, and electronegativity, also contribute to the similarity of chemical properties within a group. These trends affect how atoms interact with each other during chemical reactions.

Elements that are in the same group of the periodic table tend to exhibit similar chemical properties due to their shared number of valence electrons. This similarity arises from the periodic trends and influences how elements interact with other substances, leading to the formation of compounds and the manifestation of specific chemical behaviors.

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Which of these changes is a chemical change?
A. A block of ice forms liquid water when salt is sprinkled on it.
B. A block of ice is crushed into small pieces.
C. A block of ice melts when heated.
D. A block of ice fizzes and forms a gas when sodium is sprinkled on
it.
please help :)

Answers

It’s d I’m pretty sure that’s correct

What is the activation energy for the isomerization of methyl isocyanide? Rate Constant Temperature 472 K 4.30 X 10-3 min-1 503 K 5.54 x 10-2 min-1

Answers

The activation energy for the isomerization of methyl isocyanide is 77.6 kJ/mol.

The activation energy for the isomerization of methyl isocyanide can be determined using the Arrhenius equation. The equation relates the rate constant, activation energy, and temperature.

The Arrhenius equation is given by:

k = Ae^(-Ea/RT)

wherek = rate constant

A = pre-exponential factor (frequency factor)

Ea = activation energy

R = universal gas constant

T = temperature

R = 8.314 J/mol.

KEa = (-R ln(k2/k1))/(1/T2 - 1/T1)

Where k2 and k1 are the rate constants at temperatures T2 and T1, respectively.

For the given data,T1 = 472 K, T2 = 503 K, k1 = 4.30 × 10-3 min-1, k2 = 5.54 × 10-2 min-1.

Substituting these values in the equation for Ea:

Activation energy (Ea) = (-8.314 J/mol.K) ln (5.54 × 10-2 min-1 / 4.30 × 10-3 min-1) / (1/503 K - 1/472 K) = 77,600 J/mol = 77.6 kJ/mol

Therefore, the activation energy is 77.6 kJ/mol.

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What is SI unit of volume​

Answers

Answer:

The SI unit of volume is m³

write 2-3 sentences to describe the bond length and bond energy of carbon-carbon bonds in single, double, and tripple bonds

Answers

The bond length in carbon-carbon single bonds (C-C) is longer than that in double (C=C) and triple (C≡C) bonds, as they involve the sharing of one electron pair, while double and triple bonds share two and three electron pairs, respectively.

The bond length and bond energy of carbon-carbon bonds differ based on the type of bond they form. In a single bond, the carbon-carbon bond length is longer at 0.154 nm and has a bond energy of 348 kJ/mol. In a double bond, the carbon-carbon bond length is shorter at 0.134 nm and has a bond energy of 611 kJ/mol.

In a triple bond, the carbon-carbon bond length is even shorter at 0.120 nm and has a bond energy of 837 kJ/mol. These differences in bond length and bond energy are due to the increase in the number of shared electrons between carbon atoms in double and triple bonds.

In contrast, bond energy increases as the bond order rises; C-C single bonds have the lowest bond energy, while C≡C triple bonds possess the highest bond energy due to the stronger attractive forces between the bonded carbon atoms. Overall, carbon-carbon bonds exhibit a relationship where bond length decreases and bond energy increases as the number of shared electron pairs rises.

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when solutions of silver nitrate and magnesium chloride are mixed, silver chloride precipitates out of solution according to the equation 2AgNO3(aq) +MgCl2(aq) -> 2AgCl(s) + Mg(NO3)2(aq)
Part A what mass of silver chloride can be produced from 1.70L of a .223M solution of silver nitrate?
Part B The reaction described in Part A required 3.65L of magnesium chloride. What is the concentration of this magnesium chloride solution?

Answers

A) The mass of silver chloride that can be produced is 54.32 g.

B) The concentration of the magnesium chloride solution is equal to its original concentration, which is not given in the question.

Part A: To determine the mass of silver chloride produced, we need to use the balanced equation to relate the moles of silver chloride to the moles of silver nitrate.

From the balanced equation, we can see that 2 moles of silver nitrate produce 2 moles of silver chloride. Therefore, the molar ratio of silver nitrate to silver chloride is 1:1.

Given the volume of the silver nitrate solution is 1.70 L and the concentration is 0.223 M, we can calculate the moles of silver nitrate:

moles = volume × concentration = 1.70 L × 0.223 M = 0.3791 moles

Since the molar ratio is 1:1, the moles of silver chloride produced will also be 0.3791 moles.

To calculate the mass of silver chloride, we need to use its molar mass. The molar mass of AgCl is approximately 143.32 g/mol.

mass = moles × molar mass = 0.3791 moles × 143.32 g/mol = 54.32 g

Part B: The volume of magnesium chloride solution required is 3.65 L. To find the concentration of the magnesium chloride solution, we can use the balanced equation to relate the moles of magnesium chloride to the moles of silver nitrate.

From the balanced equation, we can see that 1 mole of magnesium chloride reacts with 2 moles of silver nitrate. Therefore, the molar ratio of magnesium chloride to silver nitrate is 1:2.

Given the volume of magnesium chloride solution is 3.65 L, we need to determine the moles of magnesium chloride.

moles of MgCl2 = volume × concentration = 3.65 L × concentration

Since the molar ratio is 1:2, the moles of silver nitrate will be twice the moles of magnesium chloride.

moles of AgNO3 = 2 × moles of MgCl2 = 2 × (3.65 L × concentration)

The concentration of the magnesium chloride solution can be calculated by rearranging the equation:

concentration = moles of AgNO3 / (2 × volume) = (2 × 3.65 L × concentration) / (2 × 3.65 L) = concentration

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How many Coulombs are in 4×10
4
electrons? (6×10
−15C
)

Answers

There are 6.4 × 10⁻¹⁵ Coulombs in 4 × 10⁴ electrons.

To convert the number of electrons to coulombs, we need to first multiply the number of electrons by the charge of a single electron

No. of electrons × Charge of single electron

Charge of single electron = 1.6 × 10⁻¹⁹ coulombs

Calculating using the above formula

we get: 4 × 10^4 electrons × 1.6 × 10⁻¹⁹ C/electron = 6.4 × 10⁻¹⁵ Coulombs

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sulfur trioxide decomposes to form sulfur dioxide and oxygen, like this:(g)(g)(g)write the pressure equilibrium constant expression for this reacti

Answers

The pressure equilibrium constant expression for the decomposition reaction of sulfur trioxide (SO3) to form sulfur dioxide (SO2) and oxygen (O2) can be written as follows: Kp = (pSO2 * pO2) / pSO3


In this equation, pSO2 represents the partial pressure of sulfur dioxide, pO2 represents the partial pressure of oxygen, and pSO3 represents the partial pressure of sulfur trioxide. The pressure equilibrium constant, Kp, is a ratio of the partial pressures of the products (SO2 and O2) to the partial pressure of the reactant (SO3) at equilibrium. It provides information about the position of the equilibrium and the relative amounts of the substances involved.

To determine the value of Kp, you would need to measure the partial pressures of sulfur dioxide, oxygen, and sulfur trioxide at equilibrium. Then, you can substitute these values into the equation to calculate the Kp value. It's important to note that the Kp value for a reaction depends on the temperature at which the reaction occurs.

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Danny is making iced tea. He keeps adding and mixing sugar into the tea until he starts to see sugar settle at the bottom of the glass. He stops adding sugar and keeps mixing, but the sugar does not dissolve.

Why does the sugar NOT dissolve in the tea?

Read Passage
A
The tea is no longer a solvent.
B
The solubility has been changed.
C
The solution has become saturated.
D
The sugar has become unsaturated.

Answers

Answer:

C: The solution has become saturated.

Explanation:

The sugar is not dissolving in the tea because the solution has become saturated. Saturation occurs when the concentration of solute (sugar) in a solvent (tea) has reached its maximum limit, beyond which no more solute can dissolve. At this point, the undissolved solute will settle at the bottom of the container. In this case, the tea is unable to dissolve any more sugar, so it stays at the bottom of the glass.

Answer:

C

Explanation:

What are the answers for this

What are the answers for this

Answers

Answer:

Solid:

shape: definite

volume:definite

closeness...: tightly packed

motion ..: vibrate in their position

liquid:

shape: indefinite

volume: definite

closeness: loosely packed

motion... : slide past each other

gas:

shape: indefinite

volume: indefinite

closeness: far apart

motion..: random movement

Explanation:

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Which two of the minerals shown have a metallic luster?

Which two of the minerals shown have a metallic luster?

Answers

Answer:

A and D

Explanation:

Answer:

A & D

Explanation:

How many grams are in a sample of 11.1 mol of NaNO3?

Answers

Answer: 84.99467 grams in one mole of NaNO3

Explanation:

This compound is also known as Sodium Nitrate. The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles NaNO3, or 84.99467 grams.

What’s the type of reaction and word equation for: C2H6O+2O2= 2CO2 + 3H2O

Answers

Answer:

Ethenol + Oxygen = water + Carbon Dioxide C2H5OH + 3O2 = 2CO2 + 3H2O

Explanation:

Arrange the elements in order of increasing ionization energy. chlorine, fluorine, gallium, phosphorus

Answers

Answer:  Ga, P,Cl, F

Explanation:  

Cl 1314  kJ/mole

F 1681  kJ/mole

Ga 579  kJ/mole

P 1012  kJ/mole

A sample of radon gas has a volume of 0.650 L at a temperature of -55.0 C. What volume will the gas occupy at 40.0 C, assuming constant pressure?

Answers

Answer:

0.933 L

Explanation:

Since the pressure is the same, we use the equation  \(\frac{V_{1}}{T_{1} } = \frac{V_{2} }{T_{2} }\)

V = Volume

T = Temperature

Since we are given the temperature in Celsius, we need to convert it to Kelvin by adding 273:

-55.0 + 273 = 218

40.0 + 273 = 313

\(\frac{0.650}{218} = \frac{x}{313}\)

\(0.933 = x\)

The gas will occupy a volume of 0.933 L.

(Side note - If the temperature increases, the gas will want to expand, leading to a higher volume.)

how do I balance this?

how do I balance this?

Answers

Answer:

4NaHCO3---->2Na2CO3+2CO2+2H2O

Cylinder A contains a gas whose molecules have an average speed of 0.0000001 meters/sec. Cylinder B contains a gas whose molecules have an average speed of 0.3 meters/sec. Select the statement below that is true regarding these cylinders. options: Cylinder A contains a gas that has a temperature closest to absolute zero. Even though the molecules are moving at different speeds in the two cylinders, they have the same kinetic energy. Cylinder B contains molecules that are moving more slowly than the molecules in Cylinder A. Cylinder B contains a gas that has a temperature closest to absolute zero.

Answers

Answer:

The correct option is;

Cylinder A contains a gas that has a temperature closest to absolute zero

Explanation:

From the kinetic theory of gases, the average speed of a gaseous molecule is found from the following equation;

\(v_{rms} = \sqrt{\frac{3\cdot R \cdot T}{MW} }\)

Where:

\(v_{rms}\) = rms speed which is the square root of the average of the velocities of the gas molecules squared which is used in place of the average of the gas molecules as the sum of the velocities of all the gas molecules in the cylinder is zero

R = Universal gas constant = 8.3145 J/(mol·K)

MW = Molecular weight of the gas

Hence where we have;

\(v_{rmsA}\) = Average velocity of gas A = 0.0000001 m/s

\(v_{rmsB}\) = Average velocity of gas B = 0.3 m/s

Since, R and MW are constant for the gas in cylinder A constant, therefore, as \(v_{rmsA}\) ≈ 0 m/s, the temperature, \(T_A\), of gas A is closest to absolute zero.

What is the volume of kristas rock

What is the volume of kristas rock

Answers

Answer : The volume of kristas rock is 30 mL.

Explanation :

From the given image we conclude that:

Initial volume of liquid = 150 mL

Final volume of liquid = 180 mL

Now we have to determine the volume of kristas rock.

Volume of kristas rock = Final volume of liquid - Initial volume of liquid

Volume of kristas rock = 180 mL - 150 mL

Volume of kristas rock = 30 mL

Therefore, the volume of kristas rock is 30 mL.

How can you drop two eggs the fewest amount of times, without them breaking? Whoever gets this right I will mark them brainlyest. (don't know if I spelled that right)

Answers

Answer:

Okay well simply drop it from one inch on to the ground and it won't break and you could put it into a basket with bubble wrap.

Explanation:

Well if you wrap the egg into bubble wrap a few times them put it into a basket (its your choice) then it won't break because the bubble wrap will just pop a few times but sometimes it depends on where you are dropping it from.

Have a blessed day bye! ;)

What is the number of moles of c that must completely react to produce 2. 0 moles of c2h6?.

Answers

The required number of moles of C that must fully react to produce 2. 0 moles of \(C_{2} xH_{6}\) is  2.

The balanced equation for the reaction of carbon (C) and hydrogen (H2) to produce ethane (C2H6) is:

C + 2H2 -> C2H6

From the balanced equation, we can see that for every 1 mole of carbon that reacts, 2 moles of hydrogen are also required. Therefore, in order to produce 2 moles of C2H6, we need 2 moles of hydrogen.

Since the balanced equation states that for every 1 mole of C we need 2 moles of H2, we can say that we need 2*2 =4 moles of hydrogen.

So the number of moles of C that must completely react to produce 2.0 moles of C2H6 is 2 moles.

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An aqueous solution is 40.0% by mass silver nitrate, AgNO3, and has a density of 1.47 g/mL.
The molarity of silver nitrate in the solution is
M.

Answers

Answer:

Molarity = 3.46 M

Explanation:

Given data:

Percentage of silver nitrate = 40.0%

Density of AgNO₃ = 1.47 g/mL

Molarity of solution = ?

Solution:

40% means out of 100g we have 40 g of AgNO₃ and 60g solvent.

Number of moles of silver nitrate = mass /molar mass

Number of moles = 40 g/ 170 g/mol

Number of moles = 0.235 mol

Volume of solution:

Total mass of solution = 100 g

density = 1.47 g/mL which means there are 1.47 gram into 1 mL.

100 g/1 × 1mL/ 1.47 g × 1 L / 1000 mL

0.068  L

Molarity:

Molarity = number of moles / volume in L

Molarity = 0.235 mol / 0.068  L

Molarity = 3.46 M

Which of the following is the correct equation for the reaction below?
One molecule of propane gas reacts with five molecules of oxygen gas to form three molecules of carbon dioxide gas and four molecules of water vapor.
A. CzHg (g) + 502 (9) ► 3C02 (9) + 4H20 (9)
B. C3Hg (s) + 502 (s) — 3CO2 (s) + 4H20 (3)
C. CH (9) + 502 (9) — 3C02 (9) + 4HO (9) D. CzHg (9) + 50 (g) → 3C0 (g) + 4H20 (9)

need asap​

Answers

Answer:

C₃H₈    +  5O₂   →   3CO₂    +  4H₂O

Explanation:

One molecule of propane gas reacts with five molecules of oxygen gas to form three molecules of carbon dioxide gas and four molecules of water vapor.

To every chemical equation, there are products and reactants:

   Reactants  →  Products

Here:

 Reactants:

      1 mole of propane  =   C₃H₈  

      5 mole of oxygen gas  = 5O₂  

Products;

       3 mole of CO₂  = 3CO₂

       4 moles of water vapor  = 4H₂O

The reaction equation is therefore;

  C₃H₈    +  5O₂   →   3CO₂    +  4H₂O

Answer:

C3H8 (g) + 5O2 (g) → 3CO2 (g) + 4H2O (g)

Explanation:

This is the actual answer

phosphorous can be prepared by electrolysis of an aqueous phosphate solution

Answers

Phosphorus can be prepared by electrolysis of an aqueous phosphate solution. The method of extraction of phosphorus from the phosphate solution involves the process of electrolysis.

The electrolysis process is defined as a process in which a chemical reaction is caused by an electric current passing through an electrolyte. The electrolysis of the aqueous solution of phosphate is the process in which phosphorus is extracted from the solution. The procedure of electrolysis of an aqueous phosphate solution is as follows: Two electrodes are placed into the phosphate solution, one is the anode (positive electrode) and the other is the cathode (negative electrode). The anode is made up of graphite and the cathode is made up of mercury. A direct current is then passed through the solution. When the current is passed, it causes the oxygen to be released at the anode, which combines with graphite to produce carbon dioxide.

In addition, at the cathode, hydrogen gas is released along with mercury, and the mercury is mixed with the phosphorus to produce an alloy. The mixture is then filtered, and the impurities are removed with the help of hydrochloric acid. The obtained phosphorus is solid and can be melted and moulded into sticks. The process of electrolysis is a good method for the extraction of phosphorus from aqueous solutions and the process is economically viable. This process is also good because the phosphate solution can be obtained from rock phosphates, and this process is a good alternative to the use of non-renewable phosphorus sources. The main advantages of this process are that it is cost-effective, does not require high temperatures, and is environmentally friendly.

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When atoms or molecules absorb ______________, it is often released as _____________________.

Answers

When atoms or molecules absorb energy, it is often released as light energy

What is the light energy?Light energy is a type of electromagnetic radiation. The fundamental units of light, photons, are produced when an object's atoms become heated.The only type of energy that is visible to the human sight is light, which moves in waves. The constituent parts of light are called photons, which resemble tiny energy packets.The movement of atoms results in the production of photons when an object's atoms heat up. More photons are generated when an object is hotter. Waves are the form in which light energy moves. Nothing travels more quickly than light energy, which is extremely fast.The electrons inside the atoms get more "excited" by heat, which gives them more energy.

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Ag2S(s) has a larger molar solubility than CuS even though Ag2S has the smaller Ksp value. Explain how this is possible.

Answers

Even though Ag2S has a smaller Ksp value, its molar solubility is larger due to the stoichiometry of its dissolution reaction thats why Ag2S(s) has a larger molar solubility than CuS even though Ag2S has the smaller Ksp value.

The molar solubility of a compound is the maximum amount of solute that can dissolve in a given amount of solvent. The solubility of a compound depends on its Ksp value and the conditions of the solution. Ksp is the equilibrium constant for the dissolution of a solid in a solution. It represents the product of the concentrations of the ions produced when the solid dissolves.

In the case of Ag2S and CuS, although Ag2S has a smaller Ksp value compared to CuS, it has a larger molar solubility. This is because the solubility of a compound also depends on the nature of the ions produced when it dissolves.

When Ag2S dissolves in water, it produces Ag+ and S2- ions. These ions are highly hydrated, which means they are surrounded by water molecules. This hydration decreases the attraction between the ions and prevents them from re-associating to form the solid. As a result, more Ag2S can dissolve in the water, giving it a larger molar solubility.

On the other hand, when CuS dissolves in water, it produces Cu2+ and S2- ions. These ions are not as highly hydrated as Ag+ and S2- ions. Therefore, they have a stronger attraction to each other, which makes it harder for them to stay in the solution. As a result, CuS has a smaller molar solubility compared to Ag2S, even though it has a larger Ksp value.

In summary, the molar solubility of a compound depends not only on its Ksp value but also on the nature of the ions produced when it dissolves. The more highly hydrated the ions are, the more soluble the compound will be.
Hi! The observed phenomenon can be explained by examining the molar solubility and the stoichiometry of the dissolution reactions for Ag2S and CuS.

Ag2S has a smaller Ksp value, which indicates that it is less soluble in water than CuS. However, when Ag2S dissolves, it dissociates into two moles of Ag+ ions and one mole of S2- ions:

Ag2S(s) ⇌ 2Ag+(aq) + S2-(aq)

On the other hand, CuS dissociates into one mole of Cu2+ ions and one mole of S2- ions:

CuS(s) ⇌ Cu2+(aq) + S2-(aq)

The molar solubility of a substance is the number of moles of the substance that can dissolve in a liter of water. Since Ag2S produces two moles of Ag+ ions for every mole of Ag2S that dissolves, its molar solubility is higher than that of CuS, which only produces one mole of Cu2+ ions for each mole of CuS that dissolves.

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It is important to understand where to find calcium in food, but there are a variety of factors that can interfere with the absorption of even the best sources of calcium.Which of these statements describe ways calcium bioavailability or absorption may be reduced? an unknown element is a nonmetal and has a valence electron configuration of ns2 np4 . a. how many valence electrons does this element have? b. what are some possible identities for this element? c. what is the formula of the compound this element would form with potassium? d. would this element have a larger or smaller radius than barium? e. would this element have a greater or smaller ionization energy than fluorine? What is GDP and its types? Levi's account went into overdraft. To get back to a positive balance, he deposited money at a steady rate of $26.38 per week. After 3 weeks, he had $43.1 in the account. What was the balance when the account went into overdraft? ideas and areas for Dean's food to diversify and expand its food and beverages line of products? Name one New deal program that help people like those describe in the letter Click an item in the list or group of pictures at the bottom of the problem and, holding the button down, drag it into the correct position in the answer box. The principle of ________ states in an undeformed sequence of sedimentary rocks each bed is older than the one above and younger than the one below. hich correctly describes how the graph of the inequality 4x 2y > 20 is shaded? Which layer of the earth's interior produces volcanoes Use the scale to help you solve the equation. compute the gradient of f and then find the directional derivative f at p0 in the direction of p1 where we start at p0 1. f(x, y, z) = p x 2 y 2 z 2, p0 = (1, 3, 2) and p1 = (3, 3, 2) Identifique agramaticalidades: vulgarismo, redundancia, palabra tab, solecismo, palabra bal, idiotismo, dequesmo, cosismo, pereza verbal, muletilla, modismos. 6 p La joven est ciega _________________________ Nio varn ________________________ Verdadles hablarverdad_________________________ Todo el mundo sabe______________________ Quieren pollo apanado?_ _________________________ Trajiste la cosa? ________________________ Exprese el nivel de lengua de estas locuciones: culto, vulgar, coloquial, regional, familiar, profesional. 6 p. Tiene porcentaje de bilirrubina_ ________________ Los taxis venan full ____________________ Ellos durmieron en el jorn. ________________ Pa qu estudiamos Espaol ______________ Pancho no asisti hoy. ________________ Sufre de diabetes ______________________ 1. At 25C, a 0.500 M solution of ammonia (NH) is 2.50% dissociated. Calculate the pH. 2. Calculate the percent dissociation of a 0.20 mol/L solution of the weak acid HNO if the pH of the solution which data type option would you select to create a list of values to choose from when data is entered in a field? Please help! Im dumb, and Ill mark brainliest for the person who has the best answer. Thank you for your time! Graph the line Y minus 5X equals -2 Jean Piaget believed that the __________ fit entirely in a single stage of cognitive development that he called the __________ stage. on a frictionless, horizontal air table, puck aa (with mass 0.200 kgkg) is moving toward puck bb (with mass 0.400 kgkg), which is initially at rest. after the collision, puck aa has a velocity of 0.120 m/sm/s to the left, and puck bb has a velocity of 0.650 m/sm/s to the right. What was a direct effect of increased food production during europes agricultural revolution?.