What is the pH of a buffer that consists of 0.100 M $HCOOH$ and 0.540 M $HCOONa$ ?

Question

The $pK_a$ of formic acid is 3.74.

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Answer 1 · 2016-04-21T18:14:03

$pH$ $>$ $3.74$

$pH = pK_a + log_10{[[A^_]]/[[HA]]}$

$pH = 3.74 + log_10{[0.540*mol*L^-1]/[0.100*mol*L^-1]}$

You'll have to do the calculation.