Question

An unknown acid solution was presumed to be either $HCl$ or $H_{2}S{O}_4.$ Which salt solution from the following would produce a precipitate when added to $H_{2}S{O}_4$ but not when added to $HCl$?

• A. $LiN{O}_3$
• B. $N{H}_{4}N{O}_3$
• C. $CsN{O}_3$
• D. $Ba(N{O}_3{)}_2$

Answer 1

The correct option is D $Ba(N{O}_3{)}_2$

$\because Ba{\left(N{O}_2\right)}_3$ will form a insoluble precipitate of $BaS{O}_4$ with $H_S{O}_4$ and with $HCl$, it will form a soluble $BaC{l}_2$.

$\therefore$ $Ba{\left(N{O}_3\right)}_2$ would produce a precipitate with $H_{2}S{O}_4$.