Midterm Pre-Test

Precipitation occurs when the ionic product of a solution __________ the solubility product (Ksp).

• equals

• is less than

• exceeds

• is zero

What forms when two ionic solutions produce an insoluble product?

• Complex

• Precipitate

• Buffer

• Solution

Lead acetate and barium chloride form a precipitate because __________ is insoluble.

• PbCl2

• Ba(OH)2

• Pb(NO3)2

• BaCO3

The solubility product constant (Ksp) expresses __________.

• rate of reaction

• equilibrium concentration of ions

• acid strength

• oxidation level

Which compound is soluble in water?

• AgCl

• PbSO4

• Na2SO4

• BaCO3

Precipitation is a sign of:

• physical change

• chemical reaction

• no reaction

• neutralization

The smaller the Ksp value, the __________ the salt.

• more soluble

• less soluble

• more reactive

• weaker

Why are gold and silver compounds easily precipitated?

• High Ksp

• Very low solubility

• They are gases

• They are strong acids

What is formed when an acid reacts with a base?

• Hydrogen gas

• Salt and water

• Metal oxide

• CO2 and water

The pH of a strong acid like HCl is approximately:

• 7

• 13

• 1

• 9