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5 mL of 0.4N NaOH is mixed with 20 mL of...

5 mL of 0.4N NaOH is mixed with 20 mL of 0.1N HCl. The pH of the resulting solution will be :

A

6

B

7

C

8

D

5

Text Solution

Verified by Experts

The correct Answer is:
B
`{:(NaOH,+,HCl rarr NaCl+H_(2)O),(5mL,,20mL),(0.4N,,0.1N):}`
Moles of `NaOH=(0.4)/(1000)xx5=2xx10^(-3)` moles
Moles of `HCl = (0.1)/(1000)xx20=2xx10^(-3)` moles
As the moles of NaOH and HCl are equal, the resulting solution will be neutral.
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