Question

Balance the following equations and write the corresponding ionic and net ionic equations:

A. HBr + NH3 →
B. Ba(OH)2 + H3PO4 →
C. HClO4 + Mg(OH)2 →

Answer 1

Answer: The ionic and net ionic equations are written below.

Explanation:

Net ionic equation of any reaction does not include any spectator ions.

Spectator ions are defined as the ions which does not get involved in a chemical equation. They are found on both the sides of the chemical reaction when it is present in ionic form.

• For A:  Reaction of ammonia and hydrobromic acid

The chemical equation for the reaction of ammonia and hydrobromic acid is given as:

$HBr(aq.)+NH_3(l)\rightarrow NH_4Br(aq.)$

Ionic form of the above equation follows:

$H^+(aq.)+Br^-(aq.)+NH_3(l)\rightarrow NH_4^+(aq.)+Br^-(aq.)$

As, bromide ions are present on both the sides of the reaction. Thus, it will not be present in the net ionic equation and are spectator ions.

The net ionic equation for the above reaction follows:

$H^+(aq.)+NH_3(l)\rightarrow NH_4^+(aq.)$

• For B:  Reaction of barium hydroxide and phosphoric acid:

The chemical equation for the reaction of barium hydroxide and phosphoric acid is given as:

$2H_3PO_4(aq.)+3Ba(OH)_2(aq.)\rightarrow Ba_3(PO_4)_2(s)+H_2O(l)$

Ionic form of the above equation follows:

$6H^+(aq.)+2PO_4^{3-}(aq.)+2Ba^{2+}(aq.)+6OH^-(aq.)\rightarrow Ba_3(PO_4)_3(s)+H_2O(l)$

No spectator ions are present in the above equation. So, ionic equation is the net ionic equation.

The net ionic equation for the above reaction follows:

$6H^+(aq.)+2PO_4^{3-}(aq.)+2Ba^{2+}(aq.)+6OH^-(aq.)\rightarrow Ba_3(PO_4)_3(s)+H_2O(l)$

• For C:  Reaction of magnesium hydroxide and perchloric acid:

The chemical equation for the reaction of magnesium hydroxide and perchloric acid is given as:

$2HClO_4(aq.)+Mg(OH)_2(s)\rightarrow Mg(ClO_4)_2(aq.)+2H_2O(l)$

Ionic form of the above equation follows:

$2H^+(aq.)+2ClO_4^{-}(aq.)+Mg(OH)_2(s)\rightarrow Mg^{2+}(aq.)+2ClO_4^-(aq.)+2H_2O(l)$

As, perchlorate ions are present on both the sides of the reaction. Thus, it will not be present in the net ionic equation and are spectator ions.

The net ionic equation for the above reaction follows:

$2H^+(aq.)Mg(OH)_2(s)\rightarrow Mg^{2+}(aq.)+2H_2O(l)$