Chemistry Sem 2 Unit 3 Acids & Bases

Pickles and lemons have a sour taste.

Which types of substances are in pickles to give them this sour taste?

• acids

• bases

• salts

What happens when an acid reacts with a metal such as magnesium?

• The acid is converted to a base.

• The temperature decreases.

• A chemical reaction occurs.

• The metal becomes polished and shiny.

Which type of reaction occurs between an acid and a base and results in the formation of a salt and water?

• neutralization reaction

• base-dissociation reaction

• acid-dissociation reaction

• strong acid-weak base reaction

What is Arrhenius’s definition of an acid?

• a substance that dissociates in water to produce hydroxide ions (OH−)

• a substance that dissociates in water to produce hydrogen ions (H+)

• any substance that can donate hydrogen ions (H+)

• any substance that can accept hydrogen ions (H+)

Which example is a Brønsted-Lowry base but not an Arrhenius base?

• NaOH

• NH₃

• KOH

• Ca(OH)_2

Which example is a hydronium ion?

• H+

• H₂O

• H₃O+

• OH−

Which formula is used to determine the pH

of a solution?

• pH=[OH−]

• pH=log[OH−]

• pH=−log[H+]

• pH=log[H+]

Which type of substance is an electron-pair donor?

• Arrhenius acid

• Brønsted-Lowry base

• Brønsted-Lowry acid

• Lewis base

What is the pH of pure water?

• 0

• 5

• 7

• 13

A solution of baking soda and water has a pH

of 8.40.

What type of solution is this?

• acidic

• basic

• neutral