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20 ml of 0.4 M H(2),SO(4) , and 80 ml of...

20 ml of 0.4 `M H_(2),SO_(4)` , and 80 ml of 0.2 M NaOH are mixed. Then the `p^(H)` of the resulting solution is

A

`7`

B

`1.097`

C

`12.903`

D

`11.903`

Text Solution

Verified by Experts

The correct Answer is:
A
` N_a = 0.4 xx 2 = 0. 8 M`
` V_a = 20 ml ,N_b = 0.2 N , V_b = 80 ml `
` N_aV_a = 0.8 xx 20 = 16 ` meq
` N_b V_b = 0.2 xx 8 0 = 16` meq
` therefore N_aV_a = N_bV_b rArr pH = 7 ?`
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