Which of the following will occur if a 0.1 M solution of a weak acid is diluted to 0.01 M at constant temperature?

Question

Which of the following will occur if a 0.1 M solution of a weak acid is diluted to 0.01 M at constant temperature? (A)  Ka will increase (B) pH will decrease (C) Percent ionisation increase (D)  [H+] will decrease to 0.01 M

Tardigrade Admin · Accepted Answer

We know that the degree of ionisation of weak electrolyte increases on dilution. So, if a 0.1 M solution of a weak acid is diluted to 0.01 M then the percent ionisation increases.

Q. Which of the following will occur if a $0.1 M$ solution of a weak acid is diluted to $0.01 M$ at constant temperature?

$K_{a}$ will increase

pH will decrease

Percent ionisation increase

$[H^{+}]$ will decrease to 0.01 M

We know that the degree of ionisation of weak electrolyte increases on dilution. So, if a $0.1 M$ solution of a weak acid is diluted to $0.01 M$ then the percent ionisation increases.

Q. Which of the following will occur if a 0.1M solution of a weak acid is diluted to 0.01M at constant temperature?

Ka​ will increase