A student determines the value of the equilibrium constant to be 8.47×10-37 for the following reaction. H2S(g) + 2H2O(l)3H2(g) + SO2(g) Based on this value of Keq: G° for this reaction is expected to be (greater, less) than zero. Calculate the free energy change for the reaction of 2.46 moles of H2S(g) at standard conditions at 298K. G°rxn = kJ

A chemical equation must balance according to the rule of conservation of mass. According to the rule, mass cannot be generated or removed during a chemical process. Here the number of moles of electrons transferred in the given equation is 6.

A chemical equation is said to be balanced if the quantity of each type of atom in the reaction is the same on both the reactant and product sides. In a balanced chemical equation, the mass and charge are both equal.

The numbers which are used to balance the given chemical equation are known as the coefficients.

Here the balanced equation is:

Al³⁺ (aq) + Hg(s) → Al(s) + Hg²⁺(aq)

The oxidation and reduction half-reactions are:

Oxidation eqn: Al³⁺ + 3e⁻ → Al(s)

Reduction eqn: Hg(s) → Hg²⁺(aq) +  2e⁻

However, we need to balance equations to have an equal number of electrons. The least common multiple of 3 and 2 is 6, so you'll need to multiply the equations accordingly.

Oxidation eqn: Al³⁺ + 3e⁻ → Al(s)) ₓ 2

Reduction eqn: Hg(s) → Hg²⁺ (aq) +  2e⁻ ) ₓ 3

Oxidation eqn: 2Al³⁺ + 6e⁻ → 2Al(s)

Reduction eqn: 3Hg(s) → 3Hg²⁺(aq) +  6e⁻

The electrons transferred is 6.

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Your question is incomplete, most probably your full question was:

how many moles of electrons are transferred when the equation Al³⁺ (aq) + Hg(s) → Al(s) + Hg²⁺(aq) is balanced using the smallest whole-number coefficients.

The correct order of increasing magnitude of lattice energy is:

MgO < Sr O < KI.

Lattice energy is a measure of the energy released when ions in the gas phase come together to form a solid ionic compound. It represents the strength of the electrostatic attraction between oppositely charged ions in a crystal lattice. Lattice energy is an important property in understanding the stability, solubility, and other physical and chemical properties of ionic compounds.

Lattice energy is influenced by several factors, including the charges and sizes of the ions involved. Generally, compounds with higher charges or smaller ions tend to have higher lattice energies because the electrostatic attraction between the ions is stronger. Therefore, the correct order of increasing magnitude of lattice energy is:

MgO < Sr O < KI.

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The theoretical values for ΔS and ΔG for the dissolution reaction of calcium chloride in water are approximately:

ΔS = 401.0 J/(mol·K)

ΔG = -343.6 kJ/mol

The standard molar entropy values (ΔS°) at 298 K (25°C) are as follows:

ΔS°(CaCl₂(s)) = 115.3 J/(mol·K)

ΔS°(Ca²⁺(aq)) = 72.1 J/(mol·K)

ΔS°(2Cl⁻(aq)) = 222.1 J/(mol·K)

The standard Gibbs free energy change (ΔG°) at 298 K (25°C) is given by the equation:

ΔG° = ΣnΔG°(products) - ΣnΔG°(reactants)

The standard Gibbs free energy change values (ΔG°) at 298 K (25°C) are as follows:

ΔG°(CaCl₂(s)) = -795.4 kJ/mol

ΔG°(Ca²⁺(aq)) = -544.6 kJ/mol

ΔG°(2Cl⁻(aq)) = -167.2 kJ/mol

For the dissolution reaction of CaCl₂ in water:

CaCl₂(s) → Ca²⁺(aq) + 2Cl⁻(aq)

To calculate the theoretical values of ΔS and ΔG, we use the stoichiometric coefficients of the balanced equation. The stoichiometric coefficients for the products and reactants are as follows:

n(Ca²⁺) = 1

n(Cl⁻) = 2

Calculating the values:

ΔS°(reaction) = ΣnΔS°(products) - ΣnΔS°(reactants)

= (1 * ΔS°(Ca²⁺(aq))) + (2 × ΔS°(Cl⁻(aq))) - ΔS°(CaCl₂(s))

Substituting the values:

ΔS°(reaction) = (1 × 72.1 J/(mol·K)) + (2 × 222.1 J/(mol·K)) - 115.3 J/(mol·K)

= 401.0 J/(mol·K)

ΔG°(reaction) = ΣnΔG°(products) - ΣnΔG°(reactants)

= (1 × ΔG°(Ca²⁺(aq))) + (2 × ΔG°(Cl⁻(aq))) - ΔG°(CaCl₂(s))

Substituting the values:

ΔG°(reaction) = (1 × -544.6 kJ/mol) + (2 × -167.2 kJ/mol) - (-795.4 kJ/mol)

= -343.6 kJ/mol

Therefore, the theoretical values for ΔS and ΔG for the dissolution reaction of calcium chloride in water are approximately:

ΔS = 401.0 J/(mol·K)

ΔG = -343.6 kJ/mol

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Answer:

9.63 L of NO

Explanation:

We'll begin by calculating the number of mole in 50.0 g of NH₄ClO₄. This can be obtained as follow:

Mass of NH₄ClO₄ = 50 g

Molar mass of NH₄ClO₄ = 14 + (4×1) + 35.5 + (16×4)

= 14 + 4 + 35.5 + 64

= 117.5 g/mol

Mole of NH₄ClO₄ =?

Mole = mass /molar mass

Mole of NH₄ClO₄ = 50/117.5

Mole of NH₄ClO₄ = 0.43 mole

Next, we shall determine the number of mole of NO produced by the reaction of 50 g (i.e 0.43 mole) of NH₄ClO₄. This can be obtained as follow:

3Al + 3NH₄ClO₄ –> Al₂O₃ + AlCl₃ + 3NO + 6H₂O

From the balanced equation above,

3 moles of NH₄ClO₄ reacted to produce 3 moles of NO.

Therefore, 0.43 mole of NH₄ClO₄ will also react to produce 0.43 mole of NO.

Finally, we shall determine the volume occupied by 0.43 mole of NO. This can be obtained as follow:

1 mole of NO = 22.4 L

Therefore,

0.43 mole of NO = 0.43 × 22.4

0.43 mole of NO = 9.63 L

Thus, 9.63 L of NO were obtained from the reaction.

Answer:

terminal velcity

Explanation:

Answer:

Physics is a natural science that involves the study of matter and its motion through space and time, along with related concepts such as energy and force. More broadly, it is the study of nature in an attempt to understand how the universe behaves.

Explanation:

Kinetic energy is an energy present in the object with motion. When the water freezes then the speed of the molecules decreases. Thus, option A is accurate.

Kinetic energy is possessed by an object when it is in moving motion and because of the molecules. When the temperature decreases the movement of the molecule decreases.

The decrease in the kinetic energy results in a gain of potential energy and release of heat in the surrounding. The temperature and the kinetic energy are directly proportional and affect the speed of the molecules.

Therefore, the freezing of water results in decreased speed of the water molecule.

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The equilibrium constant expression for the reaction CO(g) + 2H₂(g) ⇌ CH₃OH(g) is K = [CH₃OH] / [CO][H₂]^{2}.

The equilibrium constant is a measure of the relative concentrations of the reactants and products at equilibrium. A large value of K indicates that the reaction is product-favored, while a small value of K indicates that the reaction is reactant-favored.

The equilibrium constant is calculated by taking the product of the equilibrium concentrations of the products and dividing it by the product of the equilibrium concentrations of the reactants.

The equilibrium concentrations are the concentrations of the reactants and products at equilibrium, which is the point at which the forward and reverse reactions are occurring at the same rate.

The equilibrium constant is a useful tool for predicting the direction of a chemical reaction. A large value of K indicates that the reaction is product-favored, meaning that the products will be more abundant at equilibrium than the reactants.

A small value of K indicates that the reaction is reactant-favored, meaning that the reactants will be more abundant at equilibrium than the products.

The equilibrium constant is also a useful tool for predicting the effect of changes in temperature and pressure on a chemical reaction. An increase in temperature will generally shift the equilibrium to the side of the reaction that produces more moles of gas.

A decrease in pressure will generally shift the equilibrium to the side of the reaction that has fewer moles of gas. The equilibrium constant is a valuable tool for understanding and predicting the behavior of chemical reactions.

By understanding the equilibrium constant, chemists can predict the direction of a reaction, the effect of changes in temperature and pressure, and the relative concentrations of the reactants and products at equilibrium.

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The mass of oxygen gas in the unknown mixture is approximately 5.868 g. The mass of ethane gas in the unknown mixture is approximately 0.812 g. The mass percent of oxygen gas in the unknown mixture is approximately 71.83%.

To solve this problem, we need to determine the masses of oxygen gas and ethane gas in the unknown mixture, as well as the mass percent of oxygen gas.

Let's start by calculating the mass of water produced;

Mass of water = 1.48 g

Since water is composed of hydrogen and oxygen in a 2:1 ratio, the molar mass of water is:

Molar mass of water = 2(1.00784 g/mol) + 15.999 g/mol = 18.015 g/mol

Now we can calculate the number of moles of water produced;

Number of moles of water = Mass of water/Molar mass of water

= 1.48 g / 18.015 g/mol

≈ 0.082 mol

From balanced chemical equation for the combustion of ethane;

C₂H₆ + 7/2 O₂ → 2 CO₂ + 3 H₂O

We can see that 1 mole of ethane produces 3 moles of water. Therefore, the number of moles of ethane can be calculated as;

Number of moles of ethane = (Number of moles of water) / 3

≈ 0.082 mol / 3

≈ 0.027 mol

The molar mass of ethane (C₂H₆) is;

Molar mass of ethane = 2(12.011 g/mol) + 6(1.00784 g/mol)

= 30.0708 g/mol

Finally, we can calculate the mass of ethane;

Mass of ethane = Number of moles of ethane × Molar mass of ethane

≈ 0.027 mol × 30.0708 g/mol

≈ 0.812 g

Now, to determine the mass of oxygen gas, we subtract the mass of ethane and water from the total mass of the unknown mixture:

Mass of oxygen gas = Total mass of unknown mixture - Mass of ethane - Mass of water

= 8.16 g - 0.812 g - 1.48 g

≈ 5.868 g

Finally, we can calculate the mass percent of oxygen gas in the unknown mixture;

Mass percent of oxygen gas = (Mass of oxygen gas / Total mass of unknown mixture) × 100%

= (5.868 g / 8.16 g) × 100%

≈ 71.83%

Therefore;

The mass of oxygen gas in the unknown mixture is approximately 5.868 g.

The mass of ethane gas in the unknown mixture is approximately 0.812 g.

The mass percent of oxygen gas in the unknown mixture is approximately 71.83%.

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The correct option is C. a= true; b = false. The statement "Anions are larger than their corresponding neutral atoms" is true, and the statement "Ca2+ is smaller than Ca" is false.

a. Anions are larger than their corresponding neutral atoms.

This statement is true. When an atom gains one or more electrons to become an anion, the increased electron-electron repulsion causes the electron cloud to expand. As a result, the radius of the anion becomes larger than that of the neutral atom.

b. Ca2+ is smaller than Ca.

This statement is false. When an atom loses one or more electrons to become a cation, the electron-electron repulsion decreases, causing the remaining electrons to be drawn closer to the nucleus. As a result, the radius of the cation becomes smaller than that of the neutral atom. Therefore, Ca2+ is smaller than Ca.

The statement "Anions are larger than their corresponding neutral atoms" is true, and the statement "Ca2+ is smaller than Ca" is false. Therefore, the correct option is C. a= true; b = false.

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Answer:

Lithium has 5 elements, sulphur has 2 elements and oxygen has 4 elements

The correct option is (C) [B] > [C].

A + 2B ⇌ 2CThe equilibrium constant, Keq = 100Mole of A, nA = 0.1 molMole of B, nB = 0.1 molInitial concentration of A, [A] = 0.1/1.0 = 0.1 MInitial concentration of B, [B] = 0.1/1.0 = 0.1 MAt equilibrium, the reaction quotient (Qc) is given as,Qc = [C]²/([A][B]²)As Keq > Qc, the forward reaction is favored and the concentration of reactants decreases while the concentration of products increases. Now, let us determine the concentration of products C when the reaction reaches equilibrium.As the mole ratio of A:B:C is 1:2:2, the number of moles of C formed = 2nB = 2(0.1) = 0.2molConcentration of C at equilibrium, [C] = 0.2/1.0 = 0.2 MNow, let us compare the concentration of each reactant and product at equilibrium:[A] > [B][A] = [B][A] < [B][B] > [C][B] = [C]Hence, the correct option is (C) [B] > [C].

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Answer:

3400g

Explanation:

3.4×1000

3400g -_-

The statement "You can visualize a single nucleotide change through gel electrophoresis" is false.

Gel electrophoresis is a method for separating DNA fragments by size, not for visualizing single nucleotide changes. To visualize single nucleotide changes, other methods like DNA sequencing are used.Gel electrophoresis is a method of separating molecules according to their size and electrical charge. DNA fragments are loaded onto a gel, and an electric field is applied to move the fragments through the gel matrix. The smaller fragments will travel faster and end up at the bottom of the gel while the larger ones will remain closer to the top. The gel can then be stained with a dye such as ethidium bromide to visualize the bands.However, gel electrophoresis cannot visualize single nucleotide changes. To do this, other methods like DNA sequencing or hybridization probes are used. DNA sequencing directly reads the DNA sequence and can identify individual nucleotide changes. Hybridization probes are small pieces of DNA that are designed to bind to a specific sequence of nucleotides and can be labeled with a fluorescent marker to visualize the presence or absence of a specific sequence or mutation.

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Answer:

120 liters

Explanation:

From the question,

Applying boyles law

PV = P'V'................ Equation 1

Where P = initial pressure, V = Initial Volume, P' = Final pressure, V' = Final Volume.

make V' The subject of the equation

V' = PV/P'............. Equation 2

Given: P = 2 kpa, V = 60 liters, P' = 1 kpa

Substitute these values into equation 2

V' = (2×60)/1

V' = 120 liters

Hence the right option is A. 120 liters

Answer:

A- Before the mechanic left, the molecules were moving away from each other. When she returned, they were moving around each other.

Explanation:

Brainliest?

Answer:

Depending on the different angles the sun reaches the earth at, the amount of the suns ray may differ per angle. Smaller, more concentrated areas of the suns rays would result in warmer temperatures while areas where sunlight is spread out may have colder temperatures.

Answer:

4.9 atm

Explanation:

Given:

Total pressure = 7.0 atm

(Total number of moles)=[ (1.5 mol arg) + (3.5 mol co2) ]

= 5 moles

Let Partial pressure of CO2 gas = P(CO2)

✓✓partial pressure of CO2 can be calculated using below expresion.

P(CO2) / Total pressure = (moles of CO2 gas) / Total number of moles

✓✓ Let us substitute the values into the above expresion.

[P(CO2) / 7.0 atm ] = [3.5 mol / 5 moles]

P(CO2)= [7 atm × 3.5 moles] / [5 moles]

= 4.9 atm

Hence, the partial pressure of CO2 is 4.9 atm

Answer:

Partial pressure of CO₂ = 4.9 atm

Explanation:

From the question given above, the following data were obtained:

Mole of Ar = 1.5 moles

Mole of CO₂ = 3.5 moles

Total pressure (Pₜ) = 7.0 atm

Partial pressure of CO₂ =?

Next, we shall determine the mole fraction of CO2. This can be obtained as follow:

Mole of Ar = 1.5 moles

Mole of CO₂ = 3.5 moles

Total mole = 1.5 + 3.5

Total mole = 5 mole

Mole fraction of CO₂ = mole of CO₂ / total mole

Mole fraction of CO₂ = 3.5 / 5

Mole fraction of CO₂ = 0.7

Finally, we shall determine the partial pressure of CO₂. This can be obtained as follow:

Total pressure (Pₜ) = 7.0 atm

Mole fraction of CO₂ = 0.7

Partial pressure of CO₂ =?

Partial pressure of CO₂ = mole fraction of CO₂ × total pressure

Partial pressure of CO₂ = 0.7 × 7

Partial pressure of CO₂ = 4.9 atm

Answer:

c

Explanation:

Answer:

362,5J

Explanation:

formula for calculating Gravitational Potential Energy is mass×gravitational field strength ×height

12.5×10×2.9=362,5J

The chemical formula of the gas is Option c, Helium.

We need to take into account the molar masses and the root mean square (RMS) speeds of various gases in order to ascertain the chemical formula of the gas that escapes through the pinhole 2.65 times quicker than N₂ gas.

The following equation describes how a gas's molar mass and RMS speed are related:

RMS velocity = 1/√(molar mass)

The following ratio may be established since the provided gas leaves 2.65 times more quickly than N₂ gas:

RMS speed of the given gas / RMS speed of N₂ gas = 2.65

Now, let's compare the molar masses of the options provided:

a. Ne (Neon) has a molar mass of approximately 20 g/mol.

b. O₂ (Oxygen) has a molar mass of approximately 32 g/mol.

c. He (Helium) has a molar mass of approximately 4 g/mol.

d. Ar (Argon) has a molar mass of approximately 40 g/mol.

Since the ratio of RMS speeds is greater than 1, the molar mass of the given gas must be less than that of N₂ gas. Among the options, the only gas with a molar mass significantly lower than N₂ gas is Helium (He) with a molar mass of approximately 4 g/mol.

Therefore, the chemical formula of the gas is Option C, Helium.

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a) To determine the number of possible emission lines, we need to consider the transitions between the energy levels. The formula to calculate the number of possible transitions is given by:

Number of transitions = n*(n-1)/2

where n is the number of energy levels. In this case, considering the four energy levels (n = 1, 2, 3, 4), we have:

Number of transitions = 4*(4-1)/2 = 6

Therefore, there are six possible emission lines considering only the four quantum levels.

b) The lowest energy transition occurs from the level with n=4 to the level with n=1. This transition represents the largest energy drop and therefore emits photons of the lowest energy.

c) The emission line with the shortest wavelength corresponds to the transition with the highest energy. In this case, it occurs from the level with n=4 to the level with n=1. The transition from a higher energy level to a lower energy level results in the emission of a photon with a shorter wavelength.

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A dilute solution of NaOH needs to be standardized in order to accurately determine its concentration. Standardization involves comparing the concentration of the NaOH solution to a known concentration of a primary standard substance.

There are several reasons why standardization is necessary. Firstly, NaOH is highly hygroscopic, meaning it readily absorbs moisture from the air. This moisture absorption can alter the concentration of the solution over time, leading to inaccurate results. By standardizing the NaOH solution, we can ensure that its concentration is accurately determined at a specific point in time. Secondly, during the manufacturing and storage process, impurities may be introduced into the NaOH solution, affecting its concentration. Standardization allows us to account for these impurities and determine the true concentration of the solution. Lastly, dilution of the NaOH solution introduces a potential for errors in the preparation process, such as inaccuracies in volumetric measurements. Standardization helps correct for these errors and provides a reliable concentration value for subsequent use in various analytical procedures.

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Answer:

asexual cell

Explanation:there are mainly 2 types sexual and asexual i would say asexual because they grow without another parent and don't have a nucleus.

Answer: a) 0.579 atm

b) 0.585 bar

c) 58662 Pa

Explanation:

Pressure of the gas is defined as the force exerted by the particles on the walls of the container. It is expressed in various terms like 'mmHg', 'atm', 'kiloPascals' etc..

All these units of pressure are inter convertible.

We are given:

Pressure of the gas = 440 mmHg

a) Converting this unit of pressure into 'atm' by using conversion factor:

[tex]760mmHg=1atm[/tex]

[tex]440mmHg=\frac{1}{760}\times 440=0.579atm[/tex]

b) Converting this unit of pressure into 'bars' by using conversion factor:

[tex]760mmHg=1.01bar[/tex]

[tex]440mmHg=\frac{1.01}{760}\times 440=0.585bar[/tex]

c) Converting this unit of pressure into 'Pascal' by using conversion factor:

[tex]760mmHg=101325Pa[/tex]

[tex]440mmHg=\frac{101325}{760}\times 440=58662Pa[/tex]

To calculate the average rate of disappearance of H2O2(aq) in M/s in the first 45.0 seconds of the reaction, we need to determine the change in the concentration of H2O2 over the given time interval. By using the data provided for the volume of O2 collected at different time points, we can convert the volume of O2 to moles and then to moles of H2O2. Dividing the change in moles of H2O2 by the time interval gives us the average rate of disappearance. The correct answer from the options provided is B) 1.64 x 10^4 M/s.

To calculate the average rate of disappearance of H2O2 in M/s, we first need to convert the volume of O2 collected to moles. Since 2 mL of O2 is collected when 1 mole of H2O2 reacts, we can convert the volume of O2 to moles of H2O2 at each time point.

At 45.0 seconds, 2 mL of O2 is collected, which corresponds to 1 mole of H2O2. Therefore, the concentration of H2O2 at t = 45.0 seconds is 1 M.

At 90.0 seconds, 4 mL of O2 is collected, indicating that 2 moles of H2O2 have reacted. Hence, the concentration of H2O2 at t = 90.0 seconds is 2 M.

To calculate the average rate of disappearance, we find the change in concentration of H2O2 over the given time interval:

Change in concentration = (Final concentration - Initial concentration)

= (2 M - 1 M) = 1 M

Since the time interval is 45.0 seconds, we can calculate the average rate of disappearance by dividing the change in concentration by the time interval:

Average rate = Change in concentration / Time interval

= 1 M / 45.0 s = 1.64 x 10^4 M/s

Therefore, the average rate of disappearance of H2O2 in the first 45.0 seconds of the reaction is 1.64 x 10^4 M/s, which corresponds to option B.

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The rate of the acid-catalyzed dehydration of 1-methylcyclohexanol would be faster compared to that of cyclohexanol. This can be attributed to the presence of the methyl group ([tex]CH_{3}[/tex]) in 1-methylcyclohexanol.

The methyl group is an electron-donating group that increases the electron density on the adjacent carbon atom.

As a result, the carbon-hydrogen bond adjacent to the hydroxyl group becomes weaker and more susceptible to acid-catalyzed dehydration.

Therefore, the presence of the methyl group enhances the reactivity of 1-methylcyclohexanol compared to cyclohexanol, leading to a faster rate of dehydration.

The electron-donating nature of the methyl group promotes the departure of the hydroxyl group and facilitates the formation of the double bond.

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The complete chemical equation for cellular respiration is:

C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O + Energy

In this equation, glucose (C₆H₁₂O₆) is combined with oxygen (O₂) to produce carbon dioxide (CO₂) and water (H₂O). The process of cellular respiration occurs in the mitochondria of cells and involves the breakdown of glucose to release energy in the form of ATP (adenosine triphosphate).

During cellular respiration, glucose is oxidized to form carbon dioxide, and oxygen is reduced to form water. This process releases energy that is stored in ATP molecules and is used by cells to carry out various metabolic activities.

Overall, cellular respiration is a vital process in organisms to generate energy for cellular functions and is essential for the survival and functioning of living organisms.

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Zinc hydroxide, which is represented by the chemical formula Zn(OH)₂, is a basic hydroxide salt of zinc.

In a saturated solution of Zn(OH)₂, the concentration of the zinc ions and the hydroxide ions will be equal to the solubility product of Zn(OH)₂. As a result, we can calculate the pH of a saturated solution of Zn(OH)₂ by using the equation for the solubility product constant (Ksp).

The solubility product constant for Zn(OH)₂ is given as Ksp=1.8x10⁻¹⁴. This means that the product of the zinc ion concentration [Zn²⁺] and the hydroxide ion concentration [OH⁻] in a saturated solution of Zn(OH)₂ will be equal to 1.8x10⁻¹⁴.

Using this equation, we can calculate the concentration of hydroxide ions in a saturated solution of Zn(OH)₂. Since the concentration of zinc ions is equal to the concentration of hydroxide ions in a saturated solution of Zn(OH)₂, we can calculate the concentration of zinc ions as well.

[Zn²⁺][OH⁻] = 1.8x10⁻¹⁴∴ [Zn²⁺] = [OH⁻] = √(1.8x10⁻¹⁴) = 1.34x10⁻⁷ M. The pH of the solution can be determined by using the formula: pOH = -log[OH⁻] = -log(1.34x10⁻⁷) = 6.87pH = 14 - pOH = 7.13. Therefore, the pH of a saturated solution of Zn(OH)₂ is approximately 7.13.

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Answer:

a

Explanation: