Question

Write net ionic equations for the reaction, if any, that occurs when aqueous solutions of the following are mixed. a. chromium(III) chloride and sodium hydroxide b. silver nitrate and ammonium carbonate c. copper(II) sulfate and mercury(I) nitrate d. strontium nitrate and potassium iodide

Short answer

a. Net Ionic Equation: \(Cr^{3+}{(aq)} + 3OH^{-}{(aq)} \rightarrow Cr(OH)_3{(s)}\) b. Net Ionic Equation: \(2Ag^{+}{(aq)}+ CO_3^{2-}{(aq)} \rightarrow 2Ag_2CO_3{(s)}\) c. Net Ionic Equation: \(Hg^{2+}{(aq)} + SO_4^{2-}{(aq)} \rightarrow HgSO_4{(s)}\) d. Net Ionic Equation: \(Sr^{2+}{(aq)} + 2I^{-}{(aq)} \rightarrow SrI_2{(s)}\)

Step-by-step solution

Balanced Molecular Equation

\(CrCl_3{(aq)} + 3NaOH{(aq)} \rightarrow Cr(OH)_3{(s)} + 3NaCl{(aq)}\)

Balanced Complete Ionic Equation

\(Cr^{3+}{(aq)} + 3Cl^-{(aq)} + 3Na^{+}{(aq)} + 3OH^{-}{(aq)} \rightarrow Cr(OH)_3{(s)} + 3Na^{+}{(aq)} + 3Cl^-{(aq)}\)

Net Ionic Equation

\(Cr^{3+}{(aq)} + 3OH^{-}{(aq)} \rightarrow Cr(OH)_3{(s)}\) b. silver nitrate and ammonium carbonate

Balanced Molecular Equation

\(2AgNO_3{(aq)} + (NH_4)_2CO_3{(aq)} \rightarrow 2Ag_2CO_3{(s)} + 2NH_4NO_3{(aq)}\)

Balanced Complete Ionic Equation

\(2Ag^{+}{(aq)} + 2NO_3^-{(aq)} + 2NH_4^{+}{(aq)} + CO_3^{2-}{(aq)} \rightarrow 2Ag_2CO_3{(s)} + 2NH_4^{+}{(aq)} + 2NO_3^-{(aq)}\)

Net Ionic Equation

\(2Ag^{+}{(aq)}+ CO_3^{2-}{(aq)} \rightarrow 2Ag_2CO_3{(s)}\) c. copper(II) sulfate and mercury(I) nitrate

Balanced Molecular Equation

\(CuSO_4{(aq)} + HgNO_3{(aq)} \rightarrow Cu(NO_3)_2{(aq)} + HgSO_4{(s)}\)

Balanced Complete Ionic Equation

\(Cu^{2+}{(aq)} + SO_4^{2-}{(aq)} + Hg^{2+}{(aq)} + NO_3^-{(aq)} \rightarrow Cu^{2+}{(aq)} + 2NO_3^-{(aq)} + HgSO_4{(s)}\)

Net Ionic Equation

\(Hg^{2+}{(aq)} + SO_4^{2-}{(aq)} \rightarrow HgSO_4{(s)}\) d. strontium nitrate and potassium iodide

Balanced Molecular Equation

\(Sr(NO_3)_2{(aq)} + 2KI{(aq)} \rightarrow SrI_2{(s)} + 2KNO_3{(aq)}\)

Balanced Complete Ionic Equation

\(Sr^{2+}{(aq)} + 2NO_3^-{(aq)} + 2K^{+}{(aq)} + 2I^{-}{(aq)} \rightarrow SrI_2{(s)} + 2K^{+}{(aq)} + 2NO_3^-{(aq)}\)

Net Ionic Equation

\(Sr^{2+}{(aq)} + 2I^{-}{(aq)} \rightarrow SrI_2{(s)}\)