Question

dilute H2 S o4 is preferred than dilute HCl during salt analysis

Answer 1

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Dilute$H_2SO_4$is preferred than dilute $HCl$during salt analysis because when the salt is treated with $HCl$ ( Hydrochloric acid ) during reaction $HCl$gas is also given out along with the gas evolved by the salt.

For example;

If you are doing salt analysis using any salt whether it is a basic salt, acidic salt and neutral salt with Hydrochloric acid $HCl$. During reaction $HCl$gas is also given out along with the gas evolved by the salt.