the a for acetic acid (ch3cooh) is 1.737×10−5. what is the pa for this acid? What is the pH when the concentration of CH3COOH is equal to CH3COO-?

Titration is the process of determining the amount of a substance in a solution by measuring the volume of a solution with a known concentration that is required to react with it. The answer to the given question is option d) 5.25.

In the titration of a weak base with a strong acid, the pH at the half-equivalence point can be calculated as follows: At the half-equivalence point, we have equal moles of the weak base and the strong acid. As a result, we get a solution that contains the weak base, its conjugate acid, and water. In the solution, there is an equilibrium between the weak base and its conjugate acid. This equilibrium has an acid dissociation constant, Ka. It's given by:

Ka = [H+][A–]/[HA]

The pKa is calculated by taking the negative logarithm of Ka:

pKa = -log(Ka)

At the half-equivalence point, [HA] = [A–] and the expression for pKa becomes:

pKa = -log([H+])

Therefore, the pH at the half-equivalence point is:

pH = 1/2 (pKb + pKa)

Given that pKb = 7.95 for the weak base, we can calculate the pKa:

pKw = 14 (at 25°C)

pKw = pKa + pKb

14 = pKa + 7.95

pKa = 6.05

Therefore, the pH at the half-equivalence point is:

pH = 1/2 (7.95 + 6.05)

pH = 1/2 (14)

pH = 7

At the half-equivalence point, the pH of the solution is equal to 7. Therefore, option d) 5.25 is incorrect.

To know more about concentration visit:

https://brainly.com/question/3045247

#SPJ11

Following the cation (potassium), the anion is provided (bromide). how the ions linked with a potassium and bromine combination's chemical formula and compound name would be written

The main cation (positive ion) inside animal cells is potassium, whereas the main cation outside animal cells is sodium. The balance between potassium and sodium is maintained by ion pumps in the cell membrane. The concentration variations of these charged particles generate a difference in electric potential between the inside and outside of cells, known as the membrane potential. The potassium and sodium ions' creation of the cell membrane potential enables the cell to produce an action potential, or "spike," of electrical discharge. For bodily processes including neurotransmission, muscular contraction, and heartbeat, cells must be able to create electrical discharge.

Learn more about Cation here:

https://brainly.com/question/1333307

#SPJ4

Answer:

Troposphere

Explanation:

the lowest layer of the earths atmosphere

Answer:

1)0.5

3)1.7g

4)32g

5)1.12L

When a strong acid such as HCl is added to the carbonic acid buffer system, carbonic acid is converted into bicarbonate. The correct option is (A).

The carbonic acid buffer system is a mechanism that helps to maintain the pH of blood within the normal range. The carbonic acid buffer system works by regulating the concentrations of bicarbonate (HCO3-) and carbonic acid (H2CO3) in the blood.

When a strong acid like hydrochloric acid (HCl) is added to the carbonic acid buffer system, carbonic acid is converted into bicarbonate.

The bicarbonate is then able to bind with hydrogen ions (H+) from the strong acid, preventing a significant decrease in the blood pH.

This reaction can be represented as follows:

H2CO3 + HCl → HCO3- + H2O + Cl

This reaction is a simple equilibrium reaction. As more HCl is added, the concentration of bicarbonate increases as it is produced in the reaction. This increase in bicarbonate concentration helps to buffer the excess hydrogen ions from the strong acid, reducing its effect on the pH of blood.

Therefore, the answer to the given question is option A, carbonic acid is converted into bicarbonate.

To know more about buffer system, refer here:

https://brainly.com/question/27548311#

#SPJ11

The condition where only four chromosomes are present in some cells of a fruit fly is known as haploidy.

Haploidy can occur due to a variety of reasons, including errors during cell division, such as nondisjunction, which is the failure of chromosomes to separate properly during meiosis. In nondisjunction, the chromosomes fail to divide equally, resulting in daughter cells with abnormal numbers of chromosomes. In the case of the fruit fly, this can result in cells with only four chromosomes instead of the normal eight.

Haploidy can also occur naturally in certain stages of development, such as during gamete formation, where cells undergo meiosis to produce haploid gametes with half the number of chromosomes as the parent cell.

To learn more about chromosomes refer to:

brainly.com/question/29514935

#SPJ4

Answer:

3

Explanation:

I got this i am very smart

Answer:

The answer is 3) same mass more volume

Explanation:

Mass measures the amount of matter in a substance or an object.

Volume measures the amount of space that a substance or an object takes up.

\(\text{No. of moles } = \dfrac{\text{Mass of substance(C)} }{\text{Molar mass of substance(C)}}\\\\\\~~~~~~~~~~~~~~~~~~~=\dfrac{3.48}{12}~ \text{mol}\\\\\\~~~~~~~~~~~~~~~~~~~=0.29~ \text{mol}\)

The amount of mass that is required of CH₄ that can be dissolved in 150 ml of water at 25.0 °C and a CH, partial pressure of 2.50 atm is 0.0084 g.

We can use Henry's Law equation, which relates the concentration of a gas in a solution to its partial pressure:

C = kH * P

where C is the concentration of the gas in the solution (in moles per liter), kH is the Henry's Law constant (in M/atm), and P is the partial pressure of the gas (in atm).

First, we need to convert the volume of water from milliliters to liters:

150 mL = 0.150 L

Next, we can use the equation to calculate the concentration of methane in the water:

C = kH * P = (1.4 x 10^-3 M/atm) * (2.50 atm) = 3.5 x 10^-3 M

Now we can use the concentration and the volume of water to calculate the moles of methane dissolved:

moles = concentration * volume = (3.5 x 10^-3 M) * (0.150 L) = 5.25 x 10^-4 moles

Finally, we can use the molar mass of methane (16.04 g/mol) to convert the moles to grams:

mass = moles * molar mass = (5.25 x 10^-4 moles) * (16.04 g/mol) = 8.4 x 10^-3 g

Rounding to two significant digits gives us an answer of 0.0084 g of CH₄ gas dissolved in 150 mL of water at 25.0 °C and a CH₄ partial pressure of 2.50 atm.

Learn more about Henry's Law constant : https://brainly.com/question/7007748

#SPJ11

When completely burned in excess oxygen gas, which of the following would produce the least mass of CO2 among (a) 10.0 g CH4, (b) 10.0 g CH3OH, (c) 10.0 g C2H4, (d) 10.0 g C2H6, and (e) 10.0 g C4H5OH?If a substance is burned completely in excess oxygen, it undergoes complete combustion, which means that it is oxidized to the highest possible oxidation state.

Furthermore, when a substance is completely burned, all of its carbon and hydrogen is transformed into carbon dioxide and water, respectively. The amount of carbon dioxide generated is proportional to the amount of carbon in the molecule, and the amount of water generated is proportional to the amount of hydrogen in the molecule. The chemical equations for the complete combustion of the given substances are: (a) CH4 + 2O2 → CO2 + 2H2O (b) CH3OH + 3O2 → 2CO2 + 4H2O (c) C2H4 + 3O2 → 2CO2 + 2H2O (d) C2H6 + 3.5O2 → 2CO2 + 3H2O (e) C4H5OH + 7O2 → 4CO2 + 3H2OTherefore, we must compute the mole fraction of carbon in each substance to determine which of the given substances would produce the least mass of CO2.

Here's how to calculate the mole fraction of carbon in each substance:(a) 10.0 g CH4: 10.0 g CH4 × (1 mol CH4/16.04 g CH4) × (1 mol C/1 mol CH4) = 0.6249 mol C (b) 10.0 g CH3OH: 10.0 g CH3OH × (1 mol CH3OH/32.04 g CH3OH) × (1 mol C/1 mol CH3OH) = 0.3121 mol C (c) 10.0 g C2H4: 10.0 g C2H4 × (1 mol C2H4/28.05 g C2H4) × (2 mol C/1 mol C2H4) = 0.7113 mol C (d) 10.0 g C2H6: 10.0 g C2H6 × (1 mol C2H6/30.07 g C2H6) × (2 mol C/1 mol C2H6) = 0.6650 mol C (e) 10.0 g C4H5OH: 10.0 g C4H5OH × (1 mol C4H5OH/96.10 g C4H5OH) × (4 mol C/1 mol C4H5OH) = 0.4161 mol C. Since all of the substances are burned completely, the amount of carbon dioxide generated is proportional to the mole fraction of carbon, which means that the substance with the least mole fraction of carbon would generate the least mass of carbon dioxide.

We can calculate the mass of carbon dioxide produced by each substance using their respective mole fractions of carbon and the molar mass of carbon dioxide (44.01 g/mol): (a) 0.6249 mol C × (1 mol CO2/1 mol C) × (44.01 g CO2/1 mol CO2) = 27.51 g CO2 (b) 0.3121 mol C × (1 mol CO2/1 mol C) × (44.01 g CO2/1 mol CO2) = 13.73 g CO2 (c) 0.7113 mol C × (1 mol CO2/1 mol C) × (44.01 g CO2/1 mol CO2) = 31.28 g CO2 (d) 0.6650 mol C × (1 mol CO2/1 mol C) × (44.01 g CO2/1 mol CO2) = 29.28 g CO2 (e) 0.4161 mol C × (1 mol CO2/1 mol C) × (44.01 g CO2/1 mol CO2) = 18.30 g CO2. Therefore, the answer is (b) 10.0 g CH3OH, which would generate the least mass of CO2 if completely burned in excess oxygen gas.

To know more about oxidation state visit

https://brainly.com/question/31688257

#SPJ11

Both the statement of the resonance and resonance structure of thiocyanate ion given in the question is False.

Resonance can occur even when the elements in a molecule do not keep the same formal charge. In fact, one of the main features of resonance is that it allows for the delocalization of electrons in a molecule, which can lead to the distribution of formal charge over multiple atoms. This delocalization can result in the stabilization of the molecule and increased reactivity. The resonance structures of the thiocyanate ion, SCN⁻, are not equivalent. The thiocyanate ion has two resonance structures, one where the negative charge is on the nitrogen atom and the other where the negative charge is on the sulfur atom. These two resonance structures are not equivalent because they have different atom connectivity and formal charges. In the nitrogen resonance structure, nitrogen has a formal charge of -1 and sulfur has a formal charge of +1, while in the sulfur resonance structure, sulfur has a formal charge of -1 and nitrogen has a formal charge of +1. However, both resonance structures contribute to the overall description of the molecule, which is an important feature of resonance.

To learn more about thiocyanate ion click here

brainly.com/question/6285077

#SPJ4

Complete Question

Resonance can only occur when the elements in the molecule keep the same formal charge. True False. The resonance structures of thiocyanate ion, SCN⁻ are equivalent. True False

False. Both the statement of the resonance and resonance structure of thiocyanate ion given in the question . Resonance can occur even when the elements in a molecule do not keep the same formal charge.

In fact, one of the main features of resonance is that it allows for the delocalization of electrons in a molecule, which can lead to the distribution of formal charge over multiple atoms. This delocalization can result in the stabilization of the molecule and increased reactivity. The resonance structures of the thiocyanate ion, SCN⁻, are not equivalent. The thiocyanate ion has two resonance structures, one where the negative charge is on the nitrogen atom and the other where the negative charge is on the sulfur atom. These two resonance structures are not equivalent because they have different atom connectivity and formal charges. In the nitrogen resonance structure, nitrogen has a formal charge of -1 and sulfur has a formal charge of +1, while in the sulfur resonance structure, sulfur has a formal charge of -1 and nitrogen has a formal charge of +1. However, both resonance structures contribute to the overall description of the molecule, which is an important feature of resonance.

learn more about thiocyanate ion  here:

brainly.com/question/6285077

#SPJ4

To purpose of this experiment is 'determine how temperature affects bounce height'

Warmer ball will bounce higher than colder one

Here given data is 3 balls and height of each ball is same except  temperature

Ball A = 70˚C bounced the highest at 40cm

Ball B =  25 ˚C bounced 10cm

Ball C =  0 ˚C bounced 2cm

From the given data purpose of this experiment is to determine how temperature affects bounce height because ball A is at 70˚C means temperature is more ball bounced more at 40cm and ball B is at 25 ˚C  bounced at 10 cm and ball C is at 0 ˚C temperature at 2cm means at low temperature ball bounced low and if temperature is high then ball  bounced at high

Know more about experiment

https://brainly.com/question/17598847

#SPJ1

An amine that is insoluble in water can be made to dissolve by adding it to an aqueous solution of NaOH.

Therefore, option b. NaOH is correct option.

An amine is an organic compound with the formula RNH2 or R2NH or R3N, where R is an alkyl or aryl group. Amines are a type of derivative of ammonia, with one or more hydrogen atoms replaced by organic substituents.

Amines are classified as primary, secondary, or tertiary depending on the number of substituents attached to the nitrogen atom. Furthermore, they are weak bases, with aqueous solutions having pH values greater than 7 because of the presence of the amino group. When amines dissolve in water, they can act as either Bronsted-Lowry bases or Lewis bases. However, most amines are insoluble in water.Water-soluble amines Amines, despite being basic compounds, are often insoluble in water, which is a polar solvent.

As a result, they may be made water-soluble by reacting with acids. For instance, when an amine is added to an aqueous solution of hydrochloric acid, the amine ionizes and dissolves in the acidic solution. Water-soluble salts, such as ammonium chloride, are formed. Other acid-based techniques for making amines water-soluble include reacting them with sulfonic acids and oxoacids. Amines with low molecular weight are also soluble in water because they can form hydrogen bonds with water molecules.Solubility in water may be achieved by adding an amine to an aqueous solution of NaOH, which serves as a base, neutralizing the amine and making it soluble. Water-insoluble amines are converted to water-soluble compounds when they react with NaOH.

for such more question on amine

https://brainly.com/question/9631835

#SPJ11

Donde esta el gráfico para que te resuelvan?

The percent yield of CaCO3 is 89.3%. Note that the answer has three significant digits, which is the same as the number of significant digits in the given actual yield (0.67 g).

To calculate the percent yield, we need to first determine the theoretical yield of CaCO3 that should have been produced based on the balanced chemical equation for the reaction between Na2CO3 and CaCl2:

Na2CO3 + CaCl2 -> 2NaCl + CaCO3

From the equation, we can see that 1 mole of CaCO3 is produced for every 1 mole of CaCl2 used. Therefore, the number of moles of CaCO3 produced can be calculated as:

moles of CaCO3 = moles of CaCl2 = (0.15 mol/L) x (0.050 L) = 0.0075 moles

The molar mass of CaCO3 is 100.09 g/mol, so the theoretical yield of CaCO3 in grams can be calculated as:

theoretical yield = moles of CaCO3 x molar mass of CaCO3 = 0.0075 moles x 100.09 g/mol = 0.751 g

Now we can calculate the percent yield using the formula:

percent yield = actual yield / theoretical yield x 100%

The actual yield is given as 0.67 g, so:

percent yield = 0.67 g / 0.751 g x 100% = 89.3%

To know more about CaCO3  visit:-

https://brainly.com/question/29792038?

#SPJ11

The statement it reacts with an acid is an observation of a chemical property of the substance.

A chemical property is a characteristic of a substance that are observed in a chemical reaction. Some major chemical properties include flammability, toxicity, heat of combustion, pH value, rate of radioactive decay and chemical stability.

Properties of acids:

To learn more about acids here

https://brainly.com/question/21934387

#SPJ2

The statement that is true about alloy is that; they can only be composed of metals.

An alloy is a substance that is obtained by the combination of two or more metals. Alloys are produced owing to the fact that they may be stronger or more durable or resistant to corrosion than the individual metals.

There are many allows that find very good use such as the alloy of copper and zinc which we call bronze that could be used as an ornamental. The statement that is true about alloy is that; they can only be composed of metals.

Learn more about alloys:https://brainly.com/question/2533907

#SPJ1

Answer:

Formaldehyde, ozone, carbon monoxide, and radon are common indoor air contaminants. Formaldehyde can come from building materials and household products, ozone can be produced by electronic devices, carbon monoxide can be produced by gas appliances, and radon can seep into homes from the ground. Sulfur oxides, on the other hand, are more commonly found in outdoor air pollution, particularly from industrial emissions and fossil fuel combustion.

If Liquid 1 has a higher specific heat than Liquid 2, then Liquid 1 will take longer to increase in temperature because the higher specific heat of a liquid needs more thermal energy for heating a liquid.

Specific heat of a substance refers to the quantity of heat that is required to raise the temperature of one gram of a substance by one Celsius degree so we can conclude that  Liquid 1 will take longer to increase in temperature

Learn more about heat here: https://brainly.com/question/24390373

The molarity of the KMnO4 solution is 0.532 M (rounded to three decimal places).

To calculate the molarity of the KMnO4 solution, we need to use the stoichiometry of the reaction and the volume of the KMnO4 solution used in the titration.

Given:

Mass of H2O2 solution = 1.0 g

Concentration of H2O2 solution = 30 wt% (weight percent)

Volume of KMnO4 solution used = 22.143 mL

Molar mass of H2O2 = 34.01 g/mol

Step 1: Calculate the moles of H2O2 in the solution.

Moles of H2O2 = (Mass of H2O2 solution) / (Molar mass of H2O2)

= 1.0 g / 34.01 g/mol

= 0.0294 mol

Step 2: Calculate the moles of KMnO4 based on the stoichiometry of the reaction.

According to the balanced equation, the ratio of KMnO4 to H2O2 is 2:5.

Therefore, moles of KMnO4 = (Moles of H2O2) * (2/5)

= 0.0294 mol * (2/5)

= 0.01176 mol

Step 3: Calculate the molarity of the KMnO4 solution.

Molarity (M) = (Moles of KMnO4) / (Volume of KMnO4 solution in liters)

= 0.01176 mol / 0.022143 L

= 0.5316 M

Therefore, the molarity of the KMnO4 solution is 0.532 M (rounded to three decimal places).

learn more about molarity here

https://brainly.com/question/2817451

#SPJ11

Answer:

Using Charles law of Gas

Explanation:

Answer: i Choose the sun

because it has mass

Explanation: matter is anything that has mass and occupies space / Volume

and the sun has mass though it is not a solid one, and is made up of matter

HOPE THIS HELPSS!!!!

Diamond has the highest refractive index, causing the light wave to refract away from the boundary.

Option (C) is correct.

The key observation is that the light wave refracts away from the boundary. This suggests that the second medium has a higher index of refraction than glass. Among the given options, diamond has the highest refractive index, making it the most likely choice.

Diamond has a refractive index of approximately 2.42, which is significantly higher than that of water, air, and glass. When light travels from a medium with a lower refractive index (such as glass) to a medium with a higher refractive index (such as diamond), it bends towards the normal line. This causes the light wave to refract away from the boundary, as described in the scenario.

Therefore, the most plausible answer is that the second medium is diamond.

To learn more about Diamond  here

https://brainly.com/question/29442330

#SPJ2

Answer:

1. directly proportional to the kelvin temperature

Explanation:

Refer to the Ideal Gas Law, PV = nRT. As the temperature, which is always in Kelvin when part of the Gas Law, increases, the pressure would increase as well, meaning that they're directly proportional.

The volume of a given mass of an ideal gas at constant pressure is directly proportional to the kelvin temperature.

According to Charles's law, the volume of a given mass of gas is directly proportional to its kelvin temperature at constant pressure. This law holds true for ideal gases within the limits of low pressure and high temperature.

At low temperature and high pressure, the ideal gas law breaks down and gases deviate completely from ideal behavior. Hence, the  volume of a given mass of an ideal gas at constant pressure is directly proportional to the kelvin temperature.

Learn more: https://brainly.com/question/2673886

The letter designations for the first four sublevels with the maximum number of electrons that can be accommodated in each sublevel are : s:2, p:6, d:10, and f:14.

According to their energies, electrons are arranged into groups called shells (labeled by the principle quantum number, n). A shell's average distance from the nucleus increases with its energy in general. Subshells are smaller groups of electrons within a shell. One subshell is present in the first shell, two subshells are present in the second shell, three subshells are present in the third shell, and so on.

The letters s, p, d, and f are used to identify each shell's subshells in alphabetical sequence. Thus, the first shell only contains one s subshell (designated 1s), the second shell has two subshells (named 2s and 2p), the third shell has three subshells (called 3s, 3p, and 3d), and so on. The maximum number of electrons that can be held by a subshell varies. Any s subshell can hold up to 2 electrons; p, 6; d, 10; and f, 14.

Learn more about electrons here:

https://brainly.com/question/1255220

#SPJ4

Answer:

Chlorine is a chemical element with atomic number 17 which means there are 17 protons and 17 electrons in the atomic structure. The chemical symbol for Chlorine is Cl. Neutron Number and Mass Number of Chlorine Mass numbers of typical isotopes of Chlorine are 35; 37.

Explanation:

The potential impact of a growing bison population on soil and plant functionalities is uncertain. Bison & elk have a lot in common physically and physiologically, therefore there might be competition over food system between two varieties.

There is little functional redundancy in keystone species. This indicates that no other organism would've been able to replace the species' ecological roles when it were to vanish from ecosystem. The environment would've been forced to undergo a significant transformation, allowing for the influx of new, potentially exotic species.

Predators have a significant impact on an environment. They influence the makeup of ecosystems by releasing pollen and nutrients from foraging. Also, they influence lower organisms in the food chain by regulating the dispersion, abundance, or variability of the prey, a phenomenon called as trophic cascades.

To know more about physically visit:

https://brainly.com/question/13237992

#SPJ1