Review Acids and Bases

The characteristic ion of bases is:

• sodium ion (Na⁺)

• carbonate ion (CO₃²⁻)

• hydrogen ion (H⁺)

• hydroxide ion (OH⁻)

Acids taste:

• Sweet

• Bitter

• Sour

• Salty

Which substance is an electrolyte?

• CCl₄

• C₂H₆

• HCl

• H₂O

Which compound is a base?

• HCl

• H₃PO₄

• Ca(OH)₂

• CH₃COOH

Unlike an acid, an aqueous solution of a base

• causes some indicators to change color

• conducts electricity

• contains more H⁺ ions than OH⁻ ions

• contains more OH⁻ ions than H⁺ ions

Pheolphthalein is pink in an aqueous solution having a pH of

• 5

• 2

• 7

• 12

The pH of a solution is 7. When acid is added to the solution, the hydronium ion (H₃O⁺) concentration becomes 100 times greater. What is the pH of the new solution?

• 1

• 5

• 9

• 14

Which pH indicates a basic solution?

• 1

• 5

• 7

• 12

Which of these pH numbers indicates the highest level of acidity?

• 5

• 8

• 10

• 12

What is the color of bromcresol green indicator in a solution with a pH value of 2.0?

• Blue

• Green

• Red

• Yellow