You wish to prepare an HC 2 H 3 O 2 buffer with a of 4.18...

Question

Question

You wish to prepare an HC 2 H 3 O 2 buffer with a of 4.18 . If the of is 4.65, what ratio of C 2 H 3 O 2 /HC 2 H 3 O 2 , must you use ?

Answer 1

Answer #1

43) given PH = 4.18

Pka = 4.65

We know that PH = Pka + log [base]/[acid]

The ratio of C2H3O2-/HC2H3O2 = [base]/[acid]

Then

4.18 = 4.65 + log [ratio]

log [ratio] = 4.18 - 4.65 = 2.95

The ratio of C2H3O2- /HC2H3O2 = 2.95

Answer 2

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