Question

When 1 ml of 0.1N HCl is added to 1 litre of
a solution of pH value 4 the pH will be nearly​

Answer 1

Explanation:

pH=−log[H]

+

=4.

Hence, [H]

+

=10

−4

.

When two solutions are mixed, the expression for the hydrogen ion concentration of the resulting solution is,

[H]

+

=

V

1

+V

2

N

1

V

1

+N

2

V

2

.

Substitute values in the above expression.

[H]

+

=

0.001+1

0.1×0.001+10

−4

×1

[H]

+

=2×10

−4

M

pH=−log[H]

+

=−log(2×10

−4

)=3.7.