Question

1.) Write a net ionic equation for the reaction that occurs when aqueous solutions of potassium hydroxide and nitrous acid are combined.

2.) Write a net ionic equation for the overall reaction that occurs when aqueous solutions of sodium hydroxide and phosphoric acid are combined. Assume excess base.

Answer 1

1)

complete equation :

KOH (aq) + HNO2 (aq) ------------------------> KNO2(aq) + H2O (l)

complete ionic equation :

K+ (aq) + OH- (aq) + HNO2 (aq)---------------> K+(aq) + NO2- (aq) + H2O (l)

net ionic equation :

HNO2 (aq) + OH- (aq)   -------------------> H₂O (l) + NO₂^- (aq)

2)

complete equation :

3 NaOH (aq) + H3PO4 (aq) ------------------> Na3PO4 (aq) + 3 H2O (l)

net ionic equation :

H₃PO₄ (aq) + 3 OH^- (aq) ----------------------> PO₄^-3 (aq) + 3 H₂O (l)