Question

Which combination will produce a precipitate? Which combination will produce a precipitate? KOH (aq) and HNO3 (aq) AgC2H3O2 (aq) and HC2H3O2 (aq) Pb(NO3)2 (aq) and HCl (aq) Cu(NO3)2 (aq) and KC2H3O2 (aq) NaOH (aq) and Sr(NO3)2 (aq)

Answer 1

Explanation:

A precipitate is defined as an insoluble substance that emerges upon mixing of two aqueous solutions.

For example, $2NaOH(aq) + Sr(NO_{3})_{2}(aq) \rightarrow Sr(OH)_{2}(s) + 2NaNO_{3}(aq)$

As precipitate is a solid and it is represented by (s). And, an aqueous solution is represented by (aq).

So, the products of the given reactants will be as follows.

$KOH(aq) + HNO_{3} \rightarrow KNO_{3}(aq) + H_{2}O(aq)$

$AgC_{2}H_{3}O_{2}(aq) + HC_{2}H_{3}O_{2}(aq) \rightarrow \text{No reaction}$

$Pb(NO_{3})_{2}(aq) + HCl(aq) \rightarrow PbCl_{2}(s) + 2HNO_{3}(aq)$

$Cu(NO)_{3}_{2}(aq) + CH_{3}COOK(aq) \rightarrow Cu(CH_{3}COO)_{2})(aq) + 2KNO_{3}(aq)$

$2NaOH(aq) + Sr(NO_{3})_{2}(aq) \rightarrow Sr(OH)_{2}(s) + 2NaNO_{3}(aq)$

Hence, we can conclude that out of the given options, these two equations will produce a precipitate.

$Pb(NO_{3})_{2}(aq) + HCl(aq) \rightarrow PbCl_{2}(s) + 2HNO_{3}(aq)$

$2NaOH(aq) + Sr(NO_{3})_{2}(aq) \rightarrow Sr(OH)_{2}(s) + 2NaNO_{3}(aq)$