Question

the following chemical reaction takes place in aqueous solution: snbr₂(aq)+k₂s(aq)→sns(s)+2kbr(aq) write the net ionic equation for this reaction.

Explanation:

Step1: Write the complete ionic equation

The soluble ionic compounds $\text{SnBr}_2(aq)$, $\text{K}_2\text{S}(aq)$ and $\text{KBr}(aq)$ dissociate into ions.
$\text{Sn}^{2 + }(aq)+2\text{Br}^{-}(aq)+2\text{K}^{+}(aq)+\text{S}^{2 - }(aq)
ightarrow\text{SnS}(s)+2\text{K}^{+}(aq)+2\text{Br}^{-}(aq)$

Step2: Identify and cancel out the spectator ions

Spectator ions are $\text{K}^{+}$ and $\text{Br}^{-}$ as they appear on both sides of the equation.

Answer:

$\text{Sn}^{2 + }(aq)+\text{S}^{2 - }(aq)
ightarrow\text{SnS}(s)$