Acid Base Characteristics

A(n) _______ is a substance with a pH greater than 7.

• Base
• Acid
• Buffer
• Water

Complete the sentence.
A substance that is more basic has a _____ pH than a substance that is acidic.

• lower
• higher
• the same
• none of the above

A base is a substance

• That releases OH- ions when dissolved in water

• That releases H+ ions when dissolved in water

• Does not release any ions when dissolved in water

• None of the above

The picture below shows the relative concentrations of H+ and OH- in a solution. Is the solution an acid or a base?

• acid

• base

An acid

• is a substance that releases H+ ions when dissolved in water

• is a substance that does not release any ions when dissolved in water

• is a substance that releases OH- when dissolved in water

• releases an equal amount of OH- and H+ ions when dissolved in water

According to the pH range which substance is more acidic than lemon juice

• Hydrochloric acid
• cabbage
• milk

Which is a characteristic of a base?

• tastes sour

• reacts with metal

• feels slippery

• turn litmus paper red

NaOH is:

• an Arrhenius base

• an Arrhenius acid

• neither an acid nor a base

• both an acid and a base

If a solution is basic which ion will be more present?

• H+
• K+
• OH-
• H-

When using the Arrhenius model, what types of ions indicate that a compound is a base?

• H⁺¹

• OH^-1