Question

+
A). The of a solution changes from 5 to 8 when the solution is diluted by 1000
000 times.
(R) : When the conc.of M+ ion decreases by 10 times, then pH of the solution i
y 10 times, then PH of the solution increases by one unit.
s​

Answer 1

Answer:

∵pH=6

∴H

+

=10

−6

M

After dilution [H

+

]=

1000

10

−6

=10

−9

M

∴[H

+

] from H

2

O cannot be neglected.

Total [H

+

]=10

−9

+10

−7

=10

−7

(10

−2

+1)

=10

−7

(1.01)

pH=−log(1.01×10

−7

)

=7−0.0043

=6.9957

Explanation:

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