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Acids, Bases and Salts — Science STD 10 — Question

CBSE BoardEnglish MediumSTD 10ScienceAcids, Bases and Salts2 Marks
Question
Why do $HCl _2, HNO _3$, etc. show acidic characters in aqueous solutions while solutions while solutions of compounds like alcohol and glucose do not show acidic character?
✓

Answer

HCl and $HNO _3$ etc. dissociate in presence of water to form hydrogen ions $\left( H ^{+}\right)$. These hydrogen ions combine with $H _2 O$ to form hydronium ions $\left( H _3 O ^{+}\right)$.The reaction can be given as follows:
$HCl \longrightarrow H^{+}+Cl^{-}$
$H^{+}+H_2 O \longrightarrow H_3 O^{+}$
Because of this property HCl and $HNO _3$ show acidic character in aqueous solutions. On the other hand, alcohol and glucose cannot dissociate in water to form hydrogen ions. Hence, they do not show acidic character.

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