Question

How much water should be added to 10 g of acetic acid?

Answer 1

Answer:

Let mass of water added is V L.

Molarity= 60V10=6V1

⇒[H+]=(KaM)1/2

⇒M=Ka[H+]2                          [H+]=10−3;pKa=−logKa=4.74

∴M=1.8×10−5(10−3)2                    ∴Ka=1.8×10−5

6V1=1.8×10−510−6⇒V=3L

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