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The pH of a mixture when a 50 ml solutio...

The pH of a mixture when a 50 ml solution of pH= 1 is mixed with a 50 mL solution of pH =2 is

A

0.76

B

1.26

C

1.76

D

2.26

Text Solution

Verified by Experts

The correct Answer is:
B
`pH =1, [H^+] =10^(-1) M, pH =2, [H^+]=10^(-2)M`
`M_(1)V_(1)+M_(2)V_(2)=M_(R) (V_(1)+V_(2))`
`10^(-1) xx 50 +10^(-2) xx 50=M_(R) xx 100`
`rArr M_(R)=5.5 xx 10^(-2)M` (Resultant molarity of `H^+` ions)
`pH =-log (5.5 xx 10^(-2))=1.26`
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