Chemical Equilibrium

Which of the following is the general equilibrium expression for the reaction shown below?

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In a reversible chemical reaction having two reactants in equilibrium, if the concentration of the reactants is

doubled, the equilibrium constant will:

• Also be doubled

• Be halved

• Remains the same

• Become one-fourth of the original

The solubility of Ni(OH)₂ in aqueous solution is determined to be 3.42 × 10^-6 mol/L at 25°C. What is the K_sp of Ni(OH)₂?

• 1.60 × 10^-16

• 8.00 × 10^-17

• 1.03 × 10^-5

• 4.00 × 10^-17

• 1.20 × 10^-16

At constant temperature, certain observable properties such as pressure, concentration, density, or color

remain unchanged at equilibrium.

• TRUE

• FALSE

This reaction is reversible if it is carried out:

• In a closed vessel

• In an open vessel

• At constant pressure

• At constant temperature

What is the equilibrium expression for the reaction?

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Is this the general equilibrium expression for the reaction shown below?

• Yes

• No

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Which of the following is the general equilibrium expression for the reaction shown?

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Solid ammonium hydrogen sulfide decomposes into ammonia gas and hydrogen sulfide gas according to the equation shown.

In a certain experiment, a solid sample of NH₄HS is allowed to decompose at 24°C. The concentration of ammonia gas at equilibrium is measured to be 0.0145 M, and the concentration for hydrogen sulfide gas is measured to be 0.0145 M. Calculate the K_eq for the reaction.

• 2.10 x 10^-2

• 2.10 x 10³

• 2.10 x 10^-4

• 2.12 x 10⁵

The solubility of Ag₂SO₄ in aqueous solution is determined to be 1.55 × 10-2 mol/L at 25°C. What is the K_sp of Ag₂SO₄?

• 2.40 × 10_-4

• 1.49 × 10^-6

• 1.49 × 10^-2

• 1.49 × 10^-5

• 2.40× 10^-5