Physical Science Chapter 10

Aqueous solutions are solutions that:

• produce hydronium ions

• produce hydroxide ions

• where any liquid is the solvent

• where water is the solvent

Which of the following represents a hydronium ion?

• H+

• OH-

• H2O

• H3O+

What kind of substance is Mg(OH)2?

• an acid

• a base

• a salt

• both an acid and a base

You should never taste any chemical in a laboratory to determine whether it is an acid or a base.

• True

• False

Acidic foods usually taste ________, and basic foods usually taste ________.

A substance that turns blue litmus red and reacts with metals would most likely be a(n) ________.

A concentrated solution of a base and water contains ________.

A neutral solution has a pH value of ________.

(True or False) A change of 1 on the pH scale indicates that a substance has either double or half the amount of hydrogen ions.

• True

• False

(True or False) A pH of 4 is more acidic than a pH of 5.

• True

• False