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(DJI
(AX<7
(B) >7
24. To a 50 ml. of 0.05M formic acid how much volume of 0.10M sodium formate must be added to get a buffer
solution of pH = 4.0 ? (pKa fo the acid is 3.7)
(B) 4 ml
(A) 50 ml
(C) 39.6 ml
(D) 100 ml.
of
H.
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