(Savvas 8.4) Ch 8.4 Strength of Acids and Bases

The pH scale ranges from __________ to __________.

• 0 to 14

• 1 to 10

• -5 to 5

• 5 to 20

The pH of a neutral solution is

• 0

• 3

• 7

• 12

Water is neutral because it contains small but equal concentrations of __________ and __________.

• H₃O⁺ and OH^-

• Na⁺ and Cl^-

• CO₂ and O₂

• H₂ and O₂

Tags

NGSS.HS-ESS2-5

If you add acid to pure water, the concentration of H₃O⁺ __________ and the concentration of OH^- __________.

• increases; decreases

• decreases; increases

• remains the same; increases

• increases; remains the same

Tags

NGSS.HS-PS1-5

When weak acids and bases dissolve in water, what happens?

• They partially ionize in water.

• They completely ionize in water.

• They do not dissolve in water at all.

• They form strong acids and bases.

Tags

NGSS.HS-PS1-5

When strong acids and bases dissolve in water, what happens?

• They partially ionize in water.

• They completely ionize in water.

• They do not dissolve in water at all.

• They form weak acids and bases.

What is a buffer?

• a solution that resists changes in pH when small amounts of acid or base are added

• a device used to store electrical energy

• a type of protein found in cell membranes

• a chemical that speeds up reactions without being consumed

An electrolyte is _______________.

• a substance that conducts electricity when dissolved in water.

• a substance that does not dissolve in water.

• a substance that cannot conduct electricity in any form.

• a substance that only conducts electricity in solid state.

Tags

NGSS.HS-PS1-3

Vinegar is an example of a weak electrolyte. True or false?

• True

• False

• Only in solid state

• Only in gaseous state

Bleach and oven cleaner are:

• strong acids
• weak acids
• strong bases
• weak bases