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Acids, Bases and Salts — CHEMISTRY STD 7 — Question

ICSE BoardEnglish MediumSTD 7CHEMISTRYAcids, Bases and Salts4 Marks
Question
What is the difference between an acid salt and a normal salt ?
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Answer

A salt formed by the complete replacement of the hydrogen ions of an acid molecule (monobasic) by a metal ion or a positive ion is called a normal salt.
Example :
$\underset{\text {carbonic acid}}{H_2CO_3} + \underset{\text {sodium hydroxide}}{2NaOH} \longrightarrow \underset{\text {sodium carbonate}}{Na_2CO_3} + \underset{\text {water}}{2H_2O}$
A salt formed by the partial replacement of the hydrogen ions of an acid molecule (dibasic or tribasic) by a metal ion or a positive ion is called an acid salt.
Example:
$\underset{\text {carbonic acid}}{H_2CO_3} + \underset{\text {sodium hydroxide}}{NaOH} \longrightarrow \underset{\text {sodium hydrogen carbonate}}{NaHCO_3} + \underset{\text {water}}{2H_2O}$

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