Maharashtra BoardEnglish MediumSTD 9ScienceAcids, Bases and Salts2 Marks
Question
Define :
Acid
✓
Answer
An acid is a substance which on dissolving in water gives rise to $H$ ion as the only cation. $ \begin{aligned} & HCl _{( g )} \frac{\text { Water }}{(\text { dissociation) }} H _{(\text {(aq) }}^{+}+ Cl _{( aq )}^{-} \\ & H _2 SO _{4( l )} \frac{\text { Water }}{(\text { dissociation) }} H _{( aq )}^{+}+ HSO _{4( aq )}^{-} \end{aligned} $ For example, $HC1 , H _2 SO _4, H _2 CO _3$. $HSO _4^{-}\left(\right.$(aq) $\stackrel{\text { (dissociation) }}{\longrightarrow} H _{( aq )}^{+}+ SO _4^{2^{-}}$(aq)
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