Chemistry Final Exam

A weak acid gives a ______

• Strong conjugate acid

• Weak conjugate acid

• Weak conjugate base

• Strong conjugate base

The escape of gas molecules from the surface of an uncontained liquid is known as

• Condensation

• Evaporation

• Boiling

• Sublimation

What happens to the freezing point when you add solute to a solution?

• It causes the reaction to reach equilibrium.

• It has no effect.

• It raises the freezing point.

• It lowers the freezing point

The Boiling point of a pure solvent ____ that of a solution

• More than

• Equal to

• Lower than

• None of the above

The type of crystalline solid formed by sulfur is

• Atomic solid

• Molecular solid

• Ionic solid

• Alloy

Which of the following is the correct formula for molality?

• Molality = kilograms of solute ÷ litres of solvent

• Molality = moles of solute ÷ kilograms of solvent

• Molality = kilograms of solute ÷ kilograms of solution

• Molality = moles of solute ÷ moles of solution

The energy to change one mole of a substance from a liquid to a vapor at its boiling point is

• Molar heat of boiling

• Molar heat of fusion

• Molar heat of vaporization

• Critical heat

What is the conjugate base of H₂CO₃?

• HCO₃^-

• H⁺

• CO₃^2-

• OH^-

What is the pH of an aqueous solution if the [H⁺] = 0.20M?

• 0.9

• 0.7

• 0.5

• 0.4

Which of the following statements describes a saturated solution?

• Contains dissolved solute in equilibrium with undissolved solid

• Contains as much solvent as it can accommodate

• Contains only electrolytes

• Contains only ions