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IRISSAK [1]
3 years ago
5

Calculate the Ka for 0.220 M solution of H3AsO4, pH = 1.50

Chemistry
1 answer:
puteri [66]3 years ago
6 0
Remember that the formula to calculare KA is the following 
<span>Ka = [H+ ion]*[conj. base] / [acid] 
</span>Now that you have the data you can do as the following:
<span>Ka = [H+]*[base] / [acid] </span>
<span>Ka = [x]*[x] / [acid - x] </span>
<span>Ka = x^2 / [acid - x] 
</span>then we go
<span>Ka = [.032]^2 / [.220 - .032] 
</span>Ka = <span> 5.4 x 10^-3.
Or what is the same 
Ka = </span><span>.0054

</span>
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