AP Chem - 16 and 17 Shorter Quiz

Which combination will form a buffer solution?

• 100ml of 0.1M HCI with 50ml of 0.1M NaOH
• 100ml of 0.1M CH₃COOH with 50ml of 0.1M NaOH
• 50ml of 0.1M HCI with 100ml of 0.1M NaOH
• 50ml of 0.1M CH₃COOH with 100ml of 0.1M NaOH

Which of the following could be added to a solution of ethanoic acid to prepare a buffer?

• NaOH
• HCI
• NaCI
• More ethanoic acid

Which mixtures could act as buffers?

• I and II
• I and III
• II and III
• I, II and III

On the basis of the pH curve, the pK_a value of the acid is closest to 

• 4
• 5
• 8
• 12

HX_(aq) + Y^-_(aq) <--> HY_(aq) + X^-_(aq) K_eq > 1

A solution of a salt of a weak acid HY is added to another weak acid HX. Based on the information given above, which of the following is species is the strongest base?

• X^-

• Y^-

• HX

• HY

A student performs an acid-base titration and plots the experimental results in the graph above. Which of the following statements best explains the experimental findings?

• A weak acid was titrated with a strong base

• A weak acid was titrated with a weak base

• A strong acid was titrated with a strong bas

• A strong base was titrated with a weak acid

WHen 200 mL of 2.0 M NaOH(aq) is added to 500 mL of 1.0 M HCl(aq), the pH of the resulting mixture is closest to 

• 1.0
• 3.0
• 7.0
• 13.0

What pair is the acid & conjugate base for the following reaction: CN^- + H₂O --> HCN + OH^-

• CN^- & H₂O

• H₂O & HCN

• CN^- & HCN

• H₂O & OH^-

If the hydrogen ion concentration is 1x10^-11 M, what is the pH of the solution?

• 1

• 4

• 7

• 11

If the hydroxide ion concentration is 1x10^-12 M, what is the pH of the solution?

• 1

• 2

• 12

• 14