Calculate [H+] in a 0.20M solution of dichloroacetic acid [K=5×10−2] that also contains 0.1M sodium dichloroacetate. Neglect hydrolysis of sodium salt.
A
0.078M
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B
0.05M
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C
0.06M
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D
0.04M
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Solution
The correct option is A0.078M CHCl2COOH⇌H++CHCl2COO−
Let x be the concentration of [H+] at equilibrium.