Question

1. An aqueous solution of sodium fluoride is mixed with sulfuric acid. Write the balanced net ionic equation for the reaction.

2. Write the balanced net ionic equation for the gas producing reaction between hydrochloric acid and sodium carbonate.

Answer 1

1. Molecular equation;

2NaF(aq) + H2SO4(aq) >>>>> Na2SO4(aq) + 2HF(aq)

Full ionic equation for reaction is ;

2Na^+(aq) + 2F^-(aq) + 2H^+(aq) + SO4^2-(aq) >>>>> 2Na^+(aq) + SO4^2-(aq) + 2H^+(aq) + 2F^-(aq) .

All the ions are present on both sides in full ionic equations, there is no product(solid,liquid or gas) , so the net ionic equation isn't possible for this reaction.

2. molecular equation :

2HCl(aq) + Na2CO3(aq) >>>>>> 2NaCl(aq) + H2O(l) + CO2(g)

Full ionic -

2H^+(aq) + 2Cl^-(aq) + 2Na^+(aq) + CO3^2-(aq) >>>>> 2Na^+(aq) + 2Cl^-(aq) + H2O(l) + CO2(g)

Net ionic equation; remove common ions from full ionic equation.;

2H^+(aq) + CO3^2-(aq) >>>>>> H2O(l) + CO2(g)