Chem Acids & Bases Practice

A sour taste is a characteristic of:

• acids

• bases

• neutral

• pH scale

Which is a characteristic of a base?

• tastes sour

• found mostly in foods

• feels slippery

• turn litmus paper red

What color does litmus paper turn in the presence of a base?

• blue

• black

• green

• red

Answer explanation

Blue = Base

pH is the measure of the concentration of ______.

• Acids

• H+ ion

• OH- ion

• Bases

What is the conjugate base in the following reaction?

• HCO₃^-

• HCl

• H₂CO₃

• Cl-

Answer explanation

Conjugates appear on the right side of the equation.

Trace the H+ ... which is missing H+?

What is the conjugate acid in the following equation?

• PO₄^3- 

• HNO₃ 

• NO₃^- 

• HPO₄^2-

Answer explanation

Conjugates appear on the right side of the equation.

Trace the H+ ... which has gained an H+?

Which of the following is an Arrhenius Acid?

• LiOH

• CO₃^2-

• OH^-

• H₃PO₄

Answer explanation

An Arrhenius acid increases the concentration of H+ in an aqueous solution

NaOH is:

• an Arrhenius base

• an Arrhenius acid

• neither an acid nor a base

• both an acid and a base

Answer explanation

• An Arrhenius base increases the concentration of OH- in an aqueous solution

What color does litmus paper turn in the presence of an acid?

• blue

• black

• green

• red

Answer explanation

Blue = Base

Milk is a very weak acid. What might its pH value be?

• 6.5

• 7.8

• 4.2

• 12.2