1. predict the products of the following reactions. identify the precipitate and the spectator ions and…
1. predict the products of the following reactions. identify the precipitate and the spectator ions and write the net ionic equation.\n| chemical reactions | precipitate | spectator ions | net ionic equation |\n| ---- | ---- | ---- | ---- |\n| a.) agno₃(aq) + nabr(aq) →<br>____ + ____ | | | |\n| b.) k₃po₄(aq) + zn(ch₃coo)₂(aq) →<br>____ + ____ | | | |\n| c.) na₂s(aq) + pb(no₃)₂(aq) →<br>____ + ____ | | | |
Answer
Explanation:
Step1: Write balanced molecular equations
a. $AgNO_3(aq)+NaBr(aq)\rightarrow AgBr(s)+NaNO_3(aq)$ b. $2K_3PO_4(aq)+3Zn(CH_3COO)_2(aq)\rightarrow Zn_3(PO_4)_2(s)+6KCH_3COO(aq)$ c. $Na_2S(aq)+Pb(NO_3)_2(aq)\rightarrow PbS(s)+2NaNO_3(aq)$
Step2: Write total ionic equations
a. $Ag^+(aq)+NO_3^-(aq)+Na^+(aq)+Br^-(aq)\rightarrow AgBr(s)+Na^+(aq)+NO_3^-(aq)$ b. $6K^+(aq)+2PO_4^{3 -}(aq)+3Zn^{2+}(aq)+6CH_3COO^-(aq)\rightarrow Zn_3(PO_4)_2(s)+6K^+(aq)+6CH_3COO^-(aq)$ c. $2Na^+(aq)+S^{2 -}(aq)+Pb^{2+}(aq)+2NO_3^-(aq)\rightarrow PbS(s)+2Na^+(aq)+2NO_3^-(aq)$
Step3: Identify spectator ions
a. Spectator ions are $Na^+$ and $NO_3^-$ b. Spectator ions are $K^+$ and $CH_3COO^-$ c. Spectator ions are $Na^+$ and $NO_3^-$
Step4: Write net - ionic equations
a. $Ag^+(aq)+Br^-(aq)\rightarrow AgBr(s)$ b. $3Zn^{2+}(aq)+2PO_4^{3 -}(aq)\rightarrow Zn_3(PO_4)_2(s)$ c. $Pb^{2+}(aq)+S^{2 -}(aq)\rightarrow PbS(s)$
Answer:
| Chemical Reactions | Precipitate | Spectator Ions | Net Ionic Equation |
|---|---|---|---|
| a. $AgNO_3(aq)+NaBr(aq)\rightarrow$ | $AgBr$ | $Na^+,NO_3^-$ | $Ag^+(aq)+Br^-(aq)\rightarrow AgBr(s)$ |
| b. $K_3PO_4(aq)+Zn(CH_3COO)_2(aq)\rightarrow$ | $Zn_3(PO_4)_2$ | $K^+,CH_3COO^-$ | $3Zn^{2+}(aq)+2PO_4^{3 -}(aq)\rightarrow Zn_3(PO_4)_2(s)$ |
| c. $Na_2S(aq)+Pb(NO_3)_2(aq)\rightarrow$ | $PbS$ | $Na^+,NO_3^-$ | $Pb^{2+}(aq)+S^{2 -}(aq)\rightarrow PbS(s)$ |