Ch. 19 True/False Review

A base is a proton donor.

• True

• False

Answer explanation

Bases accept the proton!

The equivalent point is the point at which exactly enough titrant has been added to react completely with all of the analyte.

• True

• False

Answer explanation

The moles of the H⁺ = the moles of the OH^- at the equivalence point.

A solution is acidic when the hydroxide ion concentration is less than the hydrogen ion concentration.

• True

• False

Answer explanation

If the [OH^-] is larger, it is a basic solution.

A substance that can behave as an acid or as a base is called amphoteric.

• True

• False

Answer explanation

Water is the most common amphoteric sustance.

To create a conjugate acid, you lose one proton from the chemical formula.

• True

• False

Answer explanation

The conjugate acid is the base with a proton (H⁺) added to the formula.

A solution with a pH of 3.2 is a weaker acid than a solution with a pH of 5.6.

• True

• False

Answer explanation

Closer to pH of 7 makes the solution a weaker acid or base.

When solving for the K_a value, liquid water is included in the expression.

• True

• False

Answer explanation

Liquids are not included because they cannot change their concentrations.

A strong acid completely dissociates into its ions when dissolved in water.

• True

• False

Answer explanation

Weak acids only partially dissociate.

Nitric acid is an example a of diprotic acid.

• True

• False

Answer explanation

Diprotic acids need to have 2 H's in the formula, like H₂SO₄.

Hydrofluoric acid is a strong acid.

• True

• False

Answer explanation

There are only 7 strong acids:

hydrochloric acid

hydrobromic acid

hydroiodic acid

chloric acid

perchloric acid

nitric acid

sulfuric acid