chem-4-theory1 – Churner

What does the solubility product constant (Ksp) represent?

The equilibrium concentrations of the undissociated solute in a saturated solution

The rate of dissolution of a solute

The total amount of solute dissolved in solution

The equilibrium constant for the dissolution of a sparingly soluble salt

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Which factor affects the solubility of a solid in water?

The chemical nature of the solute and solvent

The presence of an inert gas

Pressure of the atmosphere

Volume of the solution

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What happens if the ionic product (Qsp) of a solution is greater than the solubility product constant (Ksp)?

The system remains in equilibrium.

The solubility of the salt increases.

More solute dissolves until equilibrium is reached.

A precipitate will form.

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Which of the following best describes Le Chatelier’s principle?

A system at equilibrium remains unaffected by external changes.

The equilibrium constant changes when a system is disturbed.

The equilibrium shifts in the direction that increases the disturbance.

A system at equilibrium will move to counteract the disturbance and restore equilibrium.

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What is true about the common ion effect?

It increases the solubility of an ionic compound.

It occurs when a salt is dissolved in a solution that contains a common ion, decreasing its solubility.

It increases the equilibrium constant of the solubility reaction when there is a common ion.

It only applies to gases dissolving in liquids, increasing solubility when there is a common ion.

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Which of the following statements is true regarding equilibrium constants (K)?

K decreases when a catalyst is added to the reaction.

The equilibrium constant changes when reactant concentrations change.

K remains constant at a given temperature.

K is affected by changes in pressure, volume, and concentration.

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What does a small Ksp value indicate about a compound’s solubility?

The compound is highly soluble in water.

The compound decomposes in water.

The compound does not dissolve at all.

The compound is sparingly soluble in water.

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What is the formula for the hydroxyl ion?

H30+

H2O2

OH-

H2O

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What happens when an inert gas, such as helium, is added to a reaction at equilibrium at constant volume?

The equilibrium constant increases.

The equilibrium shifts toward the products.

The equilibrium shifts toward the reactants.

The equilibrium remains unchanged.

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10.

How does increasing pressure affect an equilibrium involving gaseous reactants and products?

It shifts the equilibrium toward the side with more moles of gas.

It shifts the equilibrium toward the side with fewer moles of gas.

It has no effect on equilibrium.

It decreases the reaction rate but does not change equilibrium.

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