Question

13.
The degree of dissociation of acetic acid is given by
the expression a = 0.1 XC-(where C = concentration
of the acid) What is the pH of the solution :-
(1) 1 (2) 2 (3) 3 (4) 4​

Answer 1

Answer:

[H] =c alpha

=c*0.1/c

[H] =0.1

pH=-log[H]

pH=1

Explanation:

Answer 2

Answer:

The correct answer is option 1.

Explanation:

Degree of dissociation of acetic acid= $\alpha$

Concentration of acetic acid = C

Expression of degree of dissociation of acetic acid : (given)

$\alpha =0.1\times C$

$C=\frac{0.1}{\alpha }$

$[H^+]=C\alpha$

$[H^+]=\frac{0.1}{\alpha }\times \alpha$

$[H^+]=0.1$

$pH=-\log[H^+]$

$=-\log[0.1]=1$

1 is the pH of the solution.