Unit 10 Acids and Bases

Which formula can represent hydrogen ions in an aqueous solution?

• OH^-(aq)

• Hg₂²⁺(aq)

• H₃O⁺(aq)

• NH₄⁺(aq)

Tags

NGSS.HS-PS1-5

NGSS.HS-PS1-7

What is the color of bromcresol green indicator in a solution with a pH of 2.0?

• blue

• green

• red

• yellow

Which substance is an Arrhenius base?

• HNO₃

• H₂SO₃

• Ca(OH)₂

• CH₃COOH

The table below shows the molar concentrations of hydronium ion, H₃O⁺, in four different solutions. Which solution has the highest pH?

• A

• B

• C

• D

Which statement describes an electrolyte?

• An electrolyte conducts an electric current as a solid and dissolves in water.

• An electrolyte conducts an electric current as a solid and does not dissolve in water.

• When an electrolyte dissolves in water, the resulting solution conducts an electric current.

• When an electrolyte dissolves in water, the resulting solution does not conduct an electric current

Which substance is an Arrhenius acid?

• H₂

• HCl

• KCl

• NH₃

Compared to a 1.0-liter aqueous solution with a pH of 7.0, a 1.0-liter aqueous solution with a pH of 5.0 contains

• 10 times more hydronium ions

• 100 times more hydronium ions

• 10 times more hydroxide ions

• 100 times more hydroxide ions

The concentration of which ion is increased when LiOH is dissolved in water?

• hydroxide ion

• hydrogen ion

• hydronium ion

• halide ion

When the concentration of hydrogen ions in a solution is decreased by a factor of ten, the pH of the solution

• increases by 1

• increases by 10

• decreases by 1

• decreases by 10

Why is potassium nitrate classified as an electrolyte?

• It is a molecular compound

• It contains a metal

• It can conduct electricity as a solid

• It releases ions in an aqueous solution