Chemistry, 14.09.2019 07:30, cravens511peeelg
What is the ka of a weak acid (ha) if the initial concentration of weak acid is 4.5 x 10-4 m and the ph is 6.87? (pick one)
5.5 x 10-5
4.0 x 10-6
6.9 x 10-4
3.5 x 10-10
4.0 x 10-11
Answers: 1
![pH = -log[H^+]](/tpl/images/0231/0476/7d119.png)
![[H^+]=10^{-pH}](/tpl/images/0231/0476/2646c.png)
![[H^+]=10^{-6.87}=1.35 \times 10^{-7}\ M](/tpl/images/0231/0476/ad497.png)
![Ka = \frac{[H^+][A^{-}]}{[HA]}](/tpl/images/0231/0476/9796e.png)
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What is the ka of a weak acid (ha) if the initial concentration of weak acid is 4.5 x 10-4 m and the...
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