Question

For each of the following water-soluble compounds, indicate which ions are present in aqueous solution. KCN ..... (NH_4)_2CO_3 ..... Na_3PO_4 ..... List the three chemical processes that can result in the removal of ions from solutions during metathesis reactions. Give the complete molecular, ionic and net ionic balanced equations, for the following reaction. Molecular Eqn. Ionic Eqn Net ionic Eqn

Answer 1

1

i. KCN is soluble in water

And it gives

$KCN\rightarrow K^++CN^-\\ Then\\ CN^-+H_2O\rightarrow HCN+OH^-\\ ions\quad are K^+, CN^-, OH^-$

ii.

$(NH_4)_2CO_3\rightarrow NH_4^++CO_3^{2- }$

$NH_4^++H_2O\rightarrow NH_3+H_3O^+$

The ions are $NH_4^+,H_3O^+, CO_3^{2-}$ .

iii.

$\\Na_3PO_4\rightarrow Na^++PO_4^{3-}\\ PO_4^{3+}+H_2O\rightarrow H_3PO_4+OH^-\\ ions \quad are\\ Na^+,PO_4^{3-},OH^-$