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100 mL of a 0.1 M CH3COOH is titrated wi...

100 mL of a 0.1 M `CH_3COOH` is titrated with 0.1 M NaOH solution. The pH of the solution in the titration flask at the titre value of 50 is `[pK_a (CH_3COOH)= 4.74]`

A

2.37

B

4.74

C

1.34

D

5.74

Text Solution

Verified by Experts

The correct Answer is:
B
`"Initial conc. "underset(0.1M) (CH_(3)COOH) +underset(0.1M)(NaOH) Leftrightarrow underset(0)(CH_(3)COONa) +underset(0)(H_(2)O)`
`"Conc. at litre value 0.05 0.05 0.05 0.05"`
`pH =pK_a +log ""(["Salt"])/(["Acid"]) , ["Salt"] =["Acid"]`
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