Unit 8 AP Chemistry

10.0 cm³ of a solution of a strong acid with a pH of 3 is added to a volumetric flask and the total volume is made up to 1.00 dm³ by adding distilled water. The resulting solution is then thoroughly mixed.

What is the pH of the diluted solution?

• 1

• 2

• 4

• 5

A solution of 50 cm³ hydrochloric acid has a pH of 4. What is the final pH if 450 cm³ of water is added?

• 3

• 4

• 5

• 6

What is the pH of the solution formed when 10 cm³ of HCl (aq) with pH 1.0 is added to 990 cm³ of water?

• 1.5

• 2.0

• 2.5

• 3.0

What is the correct expression for the ionic product constant of water, K_w?

What is the order of increasing pH for the following solutions of the same concentration?

• HCl (aq) < NH₃ (aq) < NaOH (aq) < CH₃COOH (aq)

• CH₃COOH (aq) < HCl (aq) < NH₃ (aq) < NaOH (aq)

• HCl (aq) < CH₃COOH (aq) < NH₃ (aq) < NaOH (aq)

• NaOH (aq) < NH₃ (aq) < CH₃COOH (aq) < HCl (aq)

Which 1.0 moldm^–3 solution has the highest pH?

• Ammonium chloride

• Sulfuric acid

• Sodium chloride

• Ammonia

Which compound is a strong acid?

• NH₃

• HNO₃

• H₂CO₃

• CH₃COOH

A student adds 0.3 g of magnesium metal to equal volumes of hydrochloric acid and ethanoic acid of the same concentrations in separate flasks. Which statement is correct?

• Hydrochloric acid reacts more rapidly as it has a higher pH than ethanoic acid.

• A greater total volume of H₂ gas is produced with hydrochloric acid than with ethanoic acid.

• The same total volume of H₂ gas is produced with both hydrochloric acid and ethanoic acid.

• Ethanoic acid reacts more slowly because it has a lower pH than hydrochloric acid.

Tags

NGSS.HS-PS1-5

Which group of three compounds contains only weak acids and bases?

• A

• B

• C

• D

Which list contains only strong bases?

• ammonia, sodium hydroxide, ethylamine

• potassium hydroxide, ammonia, sodium hydroxide

• lithium hydroxide, potassium hydroxide, barium hydroxide

• ammonia, ethylamine, barium hydroxide