Acidity of salts in soln

Which of the following will give acidic solutoin
1) Na₂CO₃
2) H₂S
3) CuSO₄
4) NaBr

2 Answers

The ans. is Na2CO3 and H2S But whats the mechanism.

ya, its given right.

Na₂CO₃ + H₂S â†’ Na₂S + CO₂ + H₂O

and its clear ( CO₂ + H₂O ) is propertically an acidic solution.

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