Q. An acid HA is 40% dissociated in an aqueous solution. The hydroniumion concentration of its 0.2 M solution would be

1235 219 Equilibrium Report Error

A

0.08 M

89%

B

0.4 M

5%

C

0.2 M

5%

D

None of the above

1%

Solution:

$[H_{3} O^{+}] = C α = 0.2 \times 0.4$
$= 0.08 M$