chem-4-theory1 – Churner

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

The equilibrium shifts toward the reactants.

The equilibrium remains unchanged.

The equilibrium shifts toward the products.

The equilibrium constant increases.

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

The compound is sparingly soluble in water.

The compound does not dissolve at all.

The compound decomposes in water.

The compound is highly soluble in water.

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

The equilibrium shifts in the direction that increases the disturbance.

The equilibrium constant changes when a system is disturbed.

A system at equilibrium remains unaffected by external changes.

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

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What does the solubility product constant (Ksp) represent?

The equilibrium concentrations of the undissociated solute in a saturated solution

The total amount of solute dissolved in solution

The equilibrium constant for the dissolution of a sparingly soluble salt

The rate of dissolution of a solute

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Which factor affects the solubility of a solid in water?

The presence of an inert gas

Volume of the solution

The chemical nature of the solute and solvent

Pressure of the atmosphere

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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.

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

The equilibrium constant changes when reactant concentrations change.

K remains constant at a given temperature.

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What is true about the common ion effect?

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

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

It increases the solubility of an ionic compound.

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

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What is the formula for the hydroxyl ion?

H30+

OH-

H2O2

H2O

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

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

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

It has no effect on equilibrium.

It decreases the reaction rate but does not change equilibrium.

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10.

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

The system remains in equilibrium.

A precipitate will form.

More solute dissolves until equilibrium is reached.

The solubility of the salt increases.

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