For each of the following strong base solutions, determine [OH−][OH−] and [H3O+][H3O+] and pHpH and pOHpOH.
1.) For 8.73×10−38.73×10−3 MM LiOHLiOH, determine [OH−][OH−] and [H3O+][H3O+].
Express your answers in moles per liter to three significant figures separated by a comma.
2.) For 1.10×10−21.10×10−2 MM Ba(OH)2Ba(OH)2, determine [OH−][OH−] and [H3O+][H3O+].
Express your answers in moles per liter to three significant figures separated by a comma.
3.) For 2.1×10−42.1×10−4 MM KOHKOH, determine [OH−][OH−] and [H3O+][H3O+].
Express your answers in moles per liter to two significant figures separated by a comma.
4.) For 5.0×10−45.0×10−4 MM Ca(OH)2Ca(OH)2, determine [OH−][OH−] and [H3O+][H3O+].
Answers
For a 8.73×10−38.73×10⁻³ M LiOH, pH and pOH are 11.05 and 2.95 respectively.
For 8.74×10⁻³ M LiOH:
[OH−]=1.13×10⁻¹¹ [OH−]
=10−pOH[OH−]
=10−(2.95)[OH−]
=0.00070[H₃O⁺][OH−]
=[1.0×10⁻¹⁴][H₃O⁺]=
9.46×10−12[H₃O⁺]=10−pH[H3O+]
=10−(11.02)[H₃O⁺]
=0.000079
LiOH here, is a strong base.
The concentration of hydroxide ions, as well as the concentration of hydronium ions, can be calculated using the formula
[H₃O⁺][OH⁻] = Kw=1.0×10⁻¹⁴
Part B: pH can be calculated by the formula pH = 14.00 − pOH.
Using the value of pOH found above, we can calculate the pH: pH=14.00−2.95pH=11.05
pOH is the negative logarithm of the concentration of hydroxide ions: pOH = −log[OH⁻].
Therefore, to find pOH:
pOH=−log(0.00070)
pOH=2.95.
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Related Questions
Which toxic substance is often used to extract gold and results in harmful environmental effects?
a. acid mine drainage
b. carbon dioxide
c. sulfur dioxide
d. cyanide
e. fluoride
Answers
Cyanide is the poisonous substance used to extract gold (d).
What is cyanide?The extraction of metals and electroplating are two industrial procedures that commonly involve the highly poisonous chemical compound cyanide. Sodium cyanide, potassium cyanide, hydrogen cyanide gas, potassium ferrocyanide, and ferricyanide salts are some of the different forms it can take.
Cyanide is a poisonous compound that is frequently used to extract gold and has a negative impact on the environment. In order to remove gold particles from ore, the very poisonous chemical cyanide is employed in the gold mining process. Despite its effectiveness, cyanide leaking can have negative impacts on the ecosystem and neighboring plants and animals. Animal and fish deaths as well as contaminated water sources have been connected to cyanide releases from mining operations.
In addition, chronic exposure to low concentrations of cyanide can harm human health and result in headaches, vertigo, and nausea. Despite the fact that many nations have laws governing the use of cyanide in gold mining, its widespread usage and a lack of effective management and containment techniques continue to raise concerns.
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3. When neither air masses can overpower each other and may not move
for a long time.
1) warm front
2)cold front
3)occluded front
4)stationary front
Answers
When neither air mass can overpower the other and therefore cannot move the option 4- stationary front
A stationary front is a weather boundary where two air masses meet and neither one can overpower the other, resulting in little or no movement of the front. This can lead to prolonged periods of cloudy, damp, and often unstable weather. Warm fronts, cold fronts, and occluded fronts are all types of frontal systems that can move across a region, while stationary fronts tend to remain in a specific location for an extended period of time.
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A set of solubility data is given below.
What is the mass of the dry solute
recovered?
Sample
2
Temperature
(°C)
30.1
Boat Mass
(8)
0.730
Boat +
Solution (g)
0.929
Boat + Dry
(g)
0.816
Answers
Answer:
0.086
Explanation:
got it on acellus
The mass of the dry solute recovered from the given data is 0.086 g. Option C
To determine the mass of the dry solute recovered, we need to subtract the mass of the boat from the mass of the boat with the dry solute.
Given the data provided:
Boat Mass: 0.730 g
Boat + Solution: 0.929 g
Boat + Dry: 0.816 g
To find the mass of the dry solute, we subtract the boat mass from the boat + dry mass:
Mass of Dry Solute = (Boat + Dry) - (Boat Mass)
Mass of Dry Solute = 0.816 g - 0.730 g
Mass of Dry Solute = 0.086 g
Therefore, the correct answer is c) 0.086 g.
The mass of the dry solute recovered from the given data is 0.086 g. It is important to note that the mass of the dry solute is obtained by subtracting the mass of the boat from the mass of the boat with the dry solute, as the boat mass represents the weight of the empty boat or container used in the experiment.
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dentify the base in this acid-base reaction:
Upper N a upper O upper H plus upper H upper C l right arrow upper N a upper C l plus upper H subscript 2 upper O.
NaOH
HCl
NaCl
H2O
Answers
Answer:
NaOH
Explanation:
Sodium hydroxide is the base in the acid-base reaction as all other acids and sodium chloride is salt and water is neutral.
What is a base?According to the Arrhenius concept, base is defined as a substance which yields hydroxyl ions on dissociation.These ions react with the hydrogen ions of acids to produce salt in an acid-base reaction.
Bases have a pH higher than seven as they yield hydroxyl ions on dissociation.They are soapy in touch and have a bitter taste.According to the Lowry-Bronsted concept, base is defined as a substance which accepts protons .Base react violently with acids to produce salts .Aqueous solutions of bases can be used to conduct electricity .They can also be used as indicators in acid-base titrations.
They are used in the manufacture of soaps,paper, bleaching powder.Calcium hydroxide ,a base is used to clean sulfur dioxide gas while magnesium hydroxide can be used as an antacid to cure acidity.
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This hydrocarbon is incomplete. Draw the hydrogen atoms and the bonds connecting them to carbon atoms such that each carbon atom has four bonds. Then record the number of hydrogen atoms you drew using a text box.
Answers
The number of the hydrogen atoms that would be required from the diagram is 10.
What is a saturated compound?A Saturated compound has all its carbon atoms connected by single bonds, and each carbon atom is bonded to the maximum number of hydrogen atoms possible. This arrangement allows the compound to have no available or unsaturated bonds for additional atoms.
The compound that is shown must be butane as such the number of the hydrogen atoms that it contains is a total of ten.
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3. SE7.12D The cell organelle responsible for providing energy for cell processes in plant
and animal cells is the -
Answers
Which highway run through comlumbus
Answers
Answer:
Highway 22 ,GA 31820
Explanation:
nonpathogenic or ""normal"" crystals found in acidic urine include:
Answers
Non-pathogenic or “normal” crystals found in acidic urine include uric acid crystals and calcium oxalate crystals.
Urine is a liquid excretory product that is produced by the kidneys, stored in the bladder, and expelled from the body during urination. It's made up of water and various waste products that your body eliminates as part of its normal metabolic processes.
Crystals in urine are tiny, solid deposits that form in the kidneys and bladder. These crystals can clump together and form stones. The size of these crystals varies from a few micrometers to a few millimeters.
Crystals that occur naturally in urine and are not linked to any medical problem are called non-pathogenic crystals. Uric acid crystals and calcium oxalate crystals are two examples of these. These crystals can appear in both healthy and unhealthy individuals. In acidic urine, uric acid crystals and calcium oxalate crystals are common. Urine pH is used to classify the urine as acidic, alkaline, or neutral.
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Lithium Nitride is a ionic bonded compound because?
Answers
Methane gas (CH4) effuses 3.4 times faster than an unknown gas. Determine the molar mass of the unknown gas. Show your work or explain your answer, giving specific values used to determine the answer.
Answers
The molar mass of the unknown gas is 12.068 g/mol.
To determine the molar mass of the unknown gas, we can use Graham's Law of Effusion, which states that the rate of effusion of a gas is inversely proportional to the square root of its molar mass. We can use this relationship to calculate the molar mass of the unknown gas.
First, we calculate the molar mass of methane, which is 16.043 g/mol. Then, we use the following equation to calculate the molar mass of the unknown gas:
Molar mass of unknown gas = (molar mass of methane)² / (3.4)
Therefore, the molar mass of the unknown gas is 12.068 g/mol.
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Why is being under the band of stability a problem?
Answers
Answer:
Because that indicates that something is not stable. (im pretty sure that's the reason. Im not fully sure. Good question!)
Explanation:
What is a limitation for using solar energy to meet global energy needs?
Answers
Answer:
The sun provides more than enough energy to meet the whole world's energy needs, and unlike fossil fuels, it won't run out anytime soon. As a renewable energy source, the only limitation of solar power is our ability to turn it into electricity in an efficient and cost-effective way.
what is a molecular formula ?
Answers
Answer:
a formula giving the number of atoms of each of the elements present in one molecule of a specific compound.
Answer ; try to understand in the explanation
Explanation: Molecular Formula Definition: An expression which states the number and type of atoms present in a molecule of a substance. Examples: There are 6 C atoms and 14 H atoms in a hexane molecule, which has a molecular formula of C6H14.
If a student puts a dialysis tube with 15% salt in it, into a beaker that has only 5% salt, what would happen to the movement of water?
Answers
Answer:
- Water from beaker will move to the tube
Explanation:
Total percentage of water in the beaker;
\( = { \tt{100\% - 5\%}} \\ = { \tt{95\%}}\)
Total percentage of water in dialysis tube;
\({ \tt{ = 100\% - 15\%}} \\ = { \tt{85\%}}\)
So, there is much water concentration in the beaker than the dialysis tubing, this causes a determined percentage of water to diffuse to the tubing, and determined percentage of salt to move from tubing to the beaker.
Percentage of water moving to tubing;
\({ \tt{ = 95\% - 85\%}} \\ = { \tt{10\%}}\)
Percentage of salt moving from tubing to beaker
\({ \tt{ = 15\% - 5\%}} \\ { \tt{ = 10\%}}\)
this picture shows an excitatory postsynaptic potential (epsp). when do epsps usually occur
Answers
An excitatory postsynaptic potential (EPSP) occurs when neurotransmitters bind to receptor proteins present in the postsynaptic membrane of a synapse. This leads to depolarization of the membrane potential, making it more likely that an action potential will be generated at the axon hillock of the neuron.
EPSPs occur when neurotransmitters bind to receptor proteins present in the postsynaptic membrane of a synapse. This leads to depolarization of the membrane potential, making it more likely that an action potential will be generated at the axon hillock of the neuron. EPSPs are the primary means by which information is transmitted between neurons in the brain, and they play a critical role in shaping neural circuits.
EPSPs are most commonly associated with glutamate, which is the primary excitatory neurotransmitter in the brain. When glutamate is released by a presynaptic neuron, it binds to AMPA receptors on the postsynaptic membrane, which leads to the influx of positively charged ions such as sodium and calcium. This depolarizes the postsynaptic membrane, and if the depolarization is strong enough, it can trigger the generation of an action potential.
EPSPs can also occur with other excitatory neurotransmitters, such as acetylcholine and dopamine. These neurotransmitters bind to different types of receptors on the postsynaptic membrane, which can lead to a variety of different effects. For example, acetylcholine can bind to nicotinic receptors or muscarinic receptors, which can have different downstream effects on the postsynaptic neuron.
In summary, EPSPs are a critical component of neural communication, and they occur when neurotransmitters bind to receptors on the postsynaptic membrane of a synapse. Glutamate is the primary excitatory neurotransmitter, but other neurotransmitters can also lead to EPSPs depending on the receptor type.
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what mass of water should be added to 22 g of KCl to make 5.50% by mass solution?
Answers
383.5 grams is the mass of water should be added to 22.0 g of KCl to make a 5.50 % by mass solution.
14. How many gases are there, according to the periodic table?
Answers
Answer:
11
Explanation:
Answer:
11 gaseous elements are there in periodic table.
share one occasion in which you exhibited any of the reasoning biases or heuristics covered in this week’s zaps lab
Answers
Answer:
Heuristics are the "shortcuts" that humans use to reduce task complexity in judgment and choice, and biases are the resulting gaps between normative behavior and the heuristically determined behavior (Kahneman et al., 1982).
The availability heuristic works by prioritizing infrequent events based on recency and vividness. For example, plane crashes can make people afraid of flying. However, the likelihood of dying in a car accident is far higher than dying as a passenger on an airplane.
The three heuristics that received most attention were availability, representativeness, and anchoring and adjustment. The availability heuristic refers to the tendency to assess the probability of an event based on the ease with which instances of that event come to mind.
Heuristics are mental shortcuts that allow people to solve problems and make judgments quickly and efficiently. These rule-of-thumb strategies shorten decision-making time and allow people to function without constantly stopping to think about their next course of action.
While the deodorant example is obviously simple, biases and heuristics play a role in almost all decisions we make. Choices about who to hire, how to invest in the stock market, and when to seek medical care when something ails us are examples of more important decisions that are all influenced by biases and heuristics.
Biases can occur due to various reasons, with the most common causes being: Heuristics. These are biases that are caused by our use of mental shortcuts. Limited cognitive capacity. These are biases that are caused by our limited cognitive capacity. Noisy information processing.
Heuristics help make life easier and allow us to make quick decisions that are usually pretty accurate. Being aware of how these heuristics work as well as the potential biases they introduce might help you make better and more accurate decisions.
Another cognitive bias that has its roots in the availability heuristic is known as the optimism bias. Essentially, we tend to be too optimistic for our own good. We overestimate the likelihood that good things will happen to us while underestimating the probability that negative events will impact our lives.
Explanation:
Suppose a silicon wafer has a yield of 92 nd produced 25 total dies. how many good dies did the wafer produce?
Answers
The silicon wafer produced 23 good dies which has a yield of 92% and produced 25 dies.
The yield of a silicon wafer refers to the percentage of good dies produced out of the total number of dies on the wafer. In this case, the yield is given as 92%. To determine the number of good dies produced, we need to calculate 92% of the total number of dies.
The total number of dies produced is 25, we can calculate the number of good dies by multiplying 25 by the yield percentage.
92% can be expressed as a decimal by dividing it by 100, which gives us 0.92.
So, to find the number of good dies, we multiply 25 by 0.92:
25 * 0.92 = 23
Therefore, the silicon wafer produced 23 good dies.
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The silicon wafer produced 23 good dies which has a yield of 92% and produced 25 dies.
The yield of a silicon wafer refers to the percentage of good dies produced out of the total number of dies on the wafer. In this case, the yield is given as 92%. To determine the number of good dies produced, we need to calculate 92% of the total number of dies.
The total number of dies produced is 25, we can calculate the number of good dies by multiplying 25 by the yield percentage.
92% can be expressed as a decimal by dividing it by 100, which gives us 0.92.
So, to find the number of good dies, we multiply 25 by 0.92:
25 * 0.92 = 23
Therefore, the silicon wafer produced 23 good dies.
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You read a primary source and a secondary source that discuss the same
experiment. There is a difference in the conclusions made by these two
sources. Which should you trust more, and why?
A. The secondary source, because it is easier to understand
B. The primary source, because it contains more charts
C. The primary source, because it was written by the researcher
D. The secondary source, because it was printed on paper
SUBM
Answers
Answer:
C
Explanation:
I am not 100% sure, but it might be the answer.
That should be right
550 mL of gas at I atm is expanded to 960 mL. What will the pressure be?
Answers
Answer: If 550 ml of gas at 1 atm expands to 960 ml, the pressure will be 0.57 atm.
Explanation:
It is an exercise of Boyle's Law that says: "At constant temperature the volume of a mass of a gas is inversely proportional to the pressure it exerts".
This means that if the volume is doubled the pressure is halved, and if the pressure is increased three times as much, the volume will be one third (1/3) of what it originally was.
The word inversely proportional means that if the pressure increases the volume decreases but proportionally.
550 mL of gas at I atm is expanded to 960 mL. What will the pressure be?
Data:
V₁ = 550 mL
P₁ = 1 atm
V₂ = 960 mL
P₂ = ?
The formula of this law is:
P₁V₁ = P₂V₂Where
P₁ = Initial pressureV₁ = Initial volumeP₂ = Final pressureV₂ = Final volumeHe asks us what the pressure would be after 960 mL, we solve the formula for the final pressure, then
\(\boxed{\bold{P_1V_1=P_2V_2 \iff \ P_2=\frac{P_1V_1}{V_2} }}\)
We substitute our data in the cleared formula and solve:
\(\boxed{\bf{P_2=\dfrac{(1 \ atm \ \times \ 550\not{mL}) }{960\not{mL}} }}\)
\(\boxed{\bf{P_2=0.57 \ atm }}\)
If 550 ml of gas at 1 atm expands to 960 ml, the pressure will be 0.57 atm.
write the name and formula of the compound made of magnesium and fluorine. 15px
Answers
The name of the compound made of magnesium and fluorine is magnesium fluoride and its formula is MgF2. Magnesium fluoride is a white crystalline solid that has a bitter taste and is insoluble in water. Magnesium fluoride is a stable ionic compound with a high melting point.
This compound is the primary source of magnesium and fluoride ions in many industrial and chemical processes. Magnesium fluoride is produced by the reaction between magnesium oxide and hydrogen fluoride.
MgO + 2HF → MgF2 + H2O
In the laboratory, magnesium fluoride is produced by dissolving magnesium hydroxide in hydrofluoric acid.
Mg(OH)2 + 2HF → MgF2 + 2H2O
Magnesium fluoride is used in the production of ceramics and glass as a flux and to increase the resistance of the glass to attack by acids. Magnesium fluoride is also used as an optical coating on lenses and other optical components as it has a low refractive index.
Magnesium fluoride is a white crystalline solid with a bitter taste that is insoluble in water. It is the primary source of magnesium and fluoride ions in many industrial and chemical processes. The formula of magnesium fluoride is MgF2. It is used in the production of ceramics and glass as a flux and to increase the resistance of the glass to attack by acids. Magnesium fluoride is also used as an optical coating on lenses and other optical components as it has a low refractive index.
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why would a pregnant mother need more calcium than a woman her age that is not pregnant?
Answers
Besides building teeth and bones, calcium also keeps your blood and muscles moving and helps your nerves send messages from your brain to the rest of your body. Your body can't make calcium, so you need to get it from food or supplements. While you're pregnant, try to get at least 1,000 mg of calcium every day.
Calcium is a vital mineral. Your body uses it to build strong bones and teeth. calcium is also needed for your heart and other muscles to function properly
49. Carry out the indicated temperature conversions.
40 °C to Fahrenheit degrees
b. -40 °F to Celsius degrees
c. 232 K to Celsius degrees
d. 232 K to Fahrenheit degrees
Answers
Answer:
sorry but dorks dont learn maths
Explanation:
just kidding no offense but i think umm 1st one will stay same
i searched google
chemistry:
please help:/
Answers
Answer:
132.0grams
Explanation:
The formula mass of a compound/molecule is calculated by summing the atomic masses of each individual atom in that compound or molecule.
According to this question, the gram-formula mass of CO2 is given as 44g i.e. by adding 12g of C and 2 × 16g of O. 3CO2 means that 3 moles of the same CO2 molecule.
To find the gram-formula mass of 3 moles of CO2, the following formula is used:
Since 1 mol of CO2 contains a formula mass of 44g
3 moles of CO2 (3CO2) will contain 3 × 44g = 132g of CO2.
many acid-base reactions a starting material with a net _____ charge is usually an acid while a starting material with a net _____ charge is often a base. multiple choice question.
Answers
In many acid-base reactions, a starting material with a net Positive charge is usually an acid while a starting material with a net Negative charge is often a base.
In many acid-base reactions, a starting material with a net positive charge is usually an acid, while a starting material with a net negative charge is often a base. Acids are substances that can donate protons (H+) and are therefore positively charged when they lose a proton. Bases, on the other hand, can accept protons (H+) and tend to have a net negative charge when they gain a proton. This is based on the concept of proton transfer in acid-base reactions, where the acid donates a proton (positive charge) to the base, resulting in the formation of a new acid and base. It's important to note that not all acids or bases have a net charge, as their acidity or basicity can also be determined by other factors such as electron pair donation or acceptance.
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The gas, neon, is found in dry air at sea level at a concentration of 1.82x10-3 percent by volume. What is the concentration of Ne expressed in ppm? ppm The gas, carbon dioxide, is found in dry air at sea level at a concentration of 330. ppm. At a pressure of 747 mm Hg and a temperature of 24.4 °C, dry air contains about 2.51x1013 million molecules per cm3. The number of grams of carbon dioxide found in 1 cm3 of dry air at this temperature and pressure is grams.
Answers
The number of grams of carbon dioxide found in 1 cm³ of dry air at this temperature and pressure is approximately 6.056x10^-16 grams.
How to find out the concentration of neon in ppm?
To find the concentration of neon in ppm, you can simply convert the given percentage by volume:
1.82x10⁻ ³ % = 1.82x10⁻ ³ * 10⁴ ppm = 18.2 ppm
The concentration of Ne expressed in ppm is 18.2 ppm.
To find the number of grams of carbon dioxide in 1 cm³ of dry air:
First, calculate the mole fraction of CO₂ in dry air: 330 ppm = 330x10⁻ ⁶
Multiply the mole fraction by the number of molecules in 1 cm³ of dry air:
(330x10⁻ ⁶ ) * (2.51x10¹³ million molecules per cm³) = 8.283x10⁶ million CO₂ molecules per cm³
Convert the number of CO₂ molecules to moles:
(8.283x10⁶ million molecules) / (6.022x10²³molecules/mole) = 1.376x10⁻¹⁷ moles of CO₂ per cm³
Multiply the moles of CO₂ by its molar mass (44.01 g/mol) to get the mass of CO₂ in grams:
(1.376x10⁻¹⁷ moles) * (44.01 g/mol) = 6.056x10⁻¹⁶ grams of CO₂ per cm³
The number of grams of carbon dioxide found in 1 cm³ of dry air at this temperature and pressure is approximately 6.056x10^-16 grams.
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What are the two distinct pathways for nucleophilic aromatic substitution?
A) Addition-substitution and substitution-addition
B) Addition-elimination and elimination-addition
C) Addition-addition and elimination-elimination
D) Elimination-substitution and substitution-elimination
Answers
The two different pathways for nucleophilic aromatic substitution are addition-elimination and elimination-addition.
What are the two distinct pathways for nucleophilic aromatic substitution?The reactions are known as nucleophilic aromatic substitution reactions because they occur when a nucleophile attacks an aromatic ring before the leaving group leaves.The addition of a nucleophile to the aromatic ring takes place in the first phase of the addition-elimination process, which is the first possibility.In the second possibility, also known as the elimination-addition, the H atom is removed in the first step, resulting in an intermediate called benzyne. The benzyne is attacked by a nucleophile in the following step, resulting in a negatively charged intermediate ,that is later protonated to produce the end product.Thus, the two different pathways for nucleophilic aromatic substitution can be addition-elimination and elimination-addition.So, Option B is correct.To learn more about nucleophilic aromatic substitution , refer:
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Answer:
addition-elimination addition-addition
Explanation:
suppose a beaker of isobutyl alcohol is put inside a sealed tank containing isobutyl alcohol gas at 103. degree c and 619. torr. after ten minutes, will there be more liquid in the beaker, less liquid, or the same amount?
Answers
Based on the Laws of Thermodynamics, when a beaker of isobutyl alcohol is put inside a sealed tank containing isobutyl alcohol gas at 103.
Degree c and 619. torr, the pressure inside the tank will be higher than the pressure in the beaker, causing some of the liquid to evaporate and increase the liquid volume in the beaker. Therefore, after ten minutes, there will be more liquid in the beaker than before.
When a beaker of isobutyl alcohol is put inside a sealed tank containing isobutyl alcohol gas at 103°C and 619 torr, the molecules of isobutyl alcohol gas in the tank will be more energetic due to the increased temperature. As a result, they will move faster and collide with each other more frequently, raising the pressure inside the tank. The higher pressure in the tank will push molecules of isobutyl alcohol gas into the beaker, where they will condense into liquid due to the decrease in pressure.
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What is the∆S° of 0₂
Answers
Answer:0
Explanation: zero because it is the most stable form of oxygen in its standard state