Acid-base theory

Buffers

Exercise 2

       

Calculate the $pH$ of the following buffers:

a)$0.050\;M$ $CH_3COOH$ and $0.050\;M$ $CH_3COONa$ solution

$pH = 4.75$

b)$0.150\;M$ $HCOOH$ and $0.250\; M$ $HCOONa$ solution

$pH = 3.97$

c)$0.050\;M$ $HNO_2$ and $0.20\;M$ $NaNO_2$ solution

$pH = 3.90$

d) $0.10\;M$ lactic acid and $0.050\;M$ sodium lactate solution

$pH = 3.56$