Neutralisation and the pH scale 10X3

Which one of the following values is most likely to represent the pH of a dilute solution of hydrochloric acid?

• pH 2

• pH 7

• pH 10

• pH 14

Barium hydroxide is an alkali. It reacts with hydrochloric acid. What happens to the pH of a solution of hydrochloric acid as an excess of aqueous barium hydroxide is added?

• The pH decreases from 14 but becomes constant at 7.

• The pH decreases from 14 to about 1.

• The pH increases from 1 but becomes constant at 7.

• The pH increases from 1 to about 14.

A weak acid ....................... dissociates in solution.

• partially

• completely

• never

A strong acid ........................... dissociates in solution.

• partially

• completely

• never

Which of the following statements is true concerning acids and bases?

• acids and bases don't react with each other

• acids mixed with bases neutralize each other

• acids mixed with bases make stronger bases

• acids mixed with bases make stronger acids

Which is the correct set of acid properties, as described by Boyle:

• sour taste, corrosive, change litmus from red to blue

• sour taste, corrosive, change litmus from blue to red

• sweet taste, slippery, change litmus from blue to red

• sour taste, slippery, change litmus from blue to red

Neutral solutions have a pH of:

• 0

• 1

• 7

• 14

True or false: a neutral solution has equal amounts of H⁺ and OH^-.

• True

• False

Which is true?

• pH of less than 7 is basic; pH of more than 7 is acidic

• pH of less than 7 is acidic; pH of more than 7 is basic

Vinegar, fruit juice, and cola are examples of:

• strong acids

• strong bases

• strong bases

• weak acids