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What are the cocentrations of H^+, HSO4^...

What are the cocentrations of `H^+, HSO_4^(-), SO_4^(2-) and H_2SO_4` in a 0.20 M solution of sulphuric acid ?
Given : `H_2SO_4 Leftrightarrow H^(+)+ SO_(4)^(2-) , K_(2)=10^(-2)M`

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The correct Answer is:
0.2116 M, 0.188M, 0.0116M, 0
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