Acid and Base Review

What is the conjugate base of the hydronium ion, H₃O⁺?

• OH^–

• H⁺

• H₂O

• H₃O²⁺

The conjugate acid of the chloride ion, Cl^–, is

• Cl₂

• H⁺

• HCl

• ClO^-

A conjugate acid is an acid that forms when

• the acid gains a proton.

• a base loses a proton.

• a base gains a proton.

• an atom accepts an electron pair.

Ions that are present before and after a neutralization reaction are

• nonelectrolytes.

• metal ions

• neutral ions.

• spectator ions

In an acid- base reaction, the conjugate base of the weaker acid is the

• stronger acid.

• stronger base

• weaker base

• None of the above

An amphoteric species is one that reacts at 25°C as a(n)

• acid only.

• base only.

• acid or base.

• None of the above

A conjugate base is the species that remains after a base has

• given up a proton.

• is formed by the addition of a proton.

• is formed by the addition of a proton to a base.

• remains after an acid has given up a proton.

In the following reaction, which substance is the conjugate base of HClO₄?

HClO₄ + H₂O ->H₃O⁺ + ClO₄^-

• H₂O

• H₃O⁺

• ClO₄^-

• Both (a) and (b)

Water is amphoteric. If it reacts with a compound that is a stronger acid than itself, water acts a

• weak base.

• strong base.

• weak acid.

• hydroxide ion.

Which of the following is most acidic?

• H₂CrO₄

• Cr(OH)₃

• Cr(OH)₂

• Cr