Unit 10: Properties of Acids and Bases

Acids taste

• sour

• bitter

• sweet

• salty

An Arrhenius acid is a substance that reacts with water to form

• H₂O (water molecules)

• OH^- (hydroxide ions)

• H⁺ (hydrogen ions)

• Cl^- (chloride ions)

Acids turn litmus paper

• green

• blue

• pink / red

• purple

Which of the following is an acid?

• NaOH

• Ba(OH)₂

• HF

• KOH

When H⁺ combines with H₂O it forms

• H₃O⁺

• NaCl

• H₂OH

• H

Which feels slippery on the skin?

• acids

• bases

• acids and bases

• salts

An Arrhenius base produces _____ in solution.

• OH^- (hydroxide ions)

• H⁺ (hydrogen ions)

• H₃O⁺ (hydronium ions)

• Cl^- (chloride ions)

A substance that has a pH greater than 7 is a ________.

• acid

• base

• salt

• acid or base

Which of the following is a base?

• HC₂H₃O₂

• NaOH

• LiCl

• HCl

Phenolphthalein is placed in a solution and it turns pink. Why?

• It is indicating an acid.

• It is indicating a base.

• It is indicating a neutral solution.

• It is indicating a chemical reaction.