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What change would be observed in sulphid...

What change would be observed in sulphide ion concentration of 0.05 M `H_2S` solution if 0.1 mole of HCl is added to one litre of it? `K_a(H_2S) = 1 xx 10^(-22)`

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`1.075 xx 10^(-8)M `to `5.0 xx 10^(-22) M`
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