Chemistry, 12.07.2019 18:00 4801651052
What is the ratio of [a–]/[ha] at ph 2.75? the pka of formic acid (methanoic acid, h–cooh) is 3.75?
Answers: 1
is:![k_a = \frac{[HCOO^{-}] [H^{+}]}{HCOOH}](/tpl/images/0081/8222/6b4d1.png)
![\frac{[HCOO^{-}]}{[HCOOH]} = \frac{k_a}{[H_+]}](/tpl/images/0081/8222/41f55.png)
![pH = -log[H^{+}]](/tpl/images/0081/8222/bbe72.png)
![[H^{+}]= 10^{-2.75} = 1.78 \times 10^{-3}](/tpl/images/0081/8222/6f1d1.png)
![\frac{[HCOO^{-}]}{[HCOOH]} = \frac{1.78\times 10^{-4}}{1.78\times 10^{-3}}](/tpl/images/0081/8222/5a216.png)
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What is the ratio of [a–]/[ha] at ph 2.75? the pka of formic acid (methanoic acid, h–cooh) is 3.75?...
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