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Chemistry

State giving reasons which is a stronger acid — dil. HCl or conc. H2CO3.

Acids Bases Salts

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Answer

Dilute HCl is a stronger acid than concentrated H2CO3
Reason — HCl dissociates almost completely in aqueous solution and produces a high concentration of H+ ions and Cl- ions, hence is a strong acid. Whereas, H2CO3 is a weak acid because it dissociates partially yielding H+ ions and bicarbonate HCO3- ion and hence, contains ions as well as molecules. Therefore, dil. HCl is a stronger acid than conc. H2CO3.

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