Question

Right the balanced net ionic equation for the reaction:

a) of Iron metal with a solution of hydrochloric acid.

b) of calcium metal with a solution of copper(II) nitrate.

Answer 1

a)

given

reaction of iron metal with HCl solution

so

the balanced reaction is

Fe(s) + 2HCl ----> FeCl2 (aq) + H2 (g)

now

write the ionic equation ,

solids and gases does not ionize

so

Fe(s) + 2H+ + 2Cl- --> Fe+2 + 2 Cl- + H2(g)

cancel out the common ions

Fe (s) + 2H+ (aq)---> Fe+2 (aq) + H2 (g)

so

the net ionic reaction is

Fe (s) + 2H+ (aq) ---> Fe+2 (aq) + H2 (g)

b)

the balanced reaction is

Ca (s) + Cu(N03)2 (aq) ---> Ca(N03)2 (aq) + Cu (s)

the ionic reaction is

Ca (s) + Cu+2 + 2N03- ---> Ca+2 + 2N03- + Cu

cancel out the common ions

so

the net ionic reaction is

Ca(s) + Cu+2 (aq) ---> Ca+2 (aq) + Cu (s)