Acids & Bases

A hydrogen ion, H⁺, is the same as a(n):

• neutron

• electron

• proton

• hydroxide ion

Acidic foods can be identified by what taste?

• salty

• sour

• bitter

• sweet

OH^- is called the:

• hydrate ion

• hydrogen ion

• hydronium ion

• hydroxide ion

Acids increase the concentration of what in water?

• H⁺ ions

• hydrate ions

• hydroxide ions

• OH^- ions

Bases can be referred to as:

• none of the choices

• proton acceptors

• proton donors

• protons

A beaker full of acid is added to a beaker full of base. The pH of the base will:

• change constantly

• decrease

• increase

• stay the same

What is the concentration of H⁺ in pure water?

• 1 x 10^-13 moles/liter

• 1 x 10^-14 moles/liter

• 1 x 10^-7 moles/liter

• 1 x 10⁷ moles/liter

A solution with a pH of 11 has a H⁺ concentration of:

• 1 x 10^-11 moles/liter

• 1 x 10^-3 moles/liter

• 1 x 10¹¹ moles/liter

• 1 x 10³ moles/liter

Which substance has the lowest pH?

• milk

• NaOH

• pure water

• lemon juice

An unknown substance is added to a solution and the pH increases. The substance is:

• acidic

• basic

• solvent

• sweet