Question

Which set of reactants forms a solid precipitate when mixed? Which set of reactants forms a solid precipitate when mixed? NaNO3(aq) and KBr(aq) Na2CO3(aq) and SrCl2(aq) KOH(aq) and Na2SO4(aq) CuBr2(aq) and NaC2H3O2(aq)

Answer 1

A solid precipitate of
`SrCO_(3)` is formed when
`Na_(2)CO_(3)` and
`SrCl_(2)` are mixed.

Step-by-step explanation:

A solid precipitate is formed only when an insoluble or sparingly soluble salt is formed through reaction between given reactants

According to solubility rule, all carbonates are insoluble except
`NH_(4)^(+)` and group IA compounds

So, a solid precipitate of
`SrCO_(3)` is formed when
`Na_(2)CO_(3)` and
`SrCl_(2)` are mixed together

Reactions:
`NaNO_(3)+KBr\rightarrow NaBr+KNO_(3)` (no precipitation)

`Na_(2)CO_(3)+SrCl_(2)\rightarrow 2NaCl+SrCO_(3)` (precipitation)

`2KOH+Na_(2)SO_(4)\rightarrow K_(2)SO_(4)+2NaOH` (no precipitation)

`CuBr_(2)+2NaC_(2)H_(3)O_(2)\rightarrow Cu(C_(2)H_(3)O_(2))_(2)+2NaBr` (no precipitation)