# What is the net ionic equation for the reactions of:a.) magnesium metal and acetic acidb.) acetic acid and ammonia solution My answers were :a.) Mg(s) + 2H+ (aq) -> Mg2+ (aq) + H2 (g)b.) H+ (aq)...

What is the net ionic equation for the reactions of:
a.) magnesium metal and acetic acid
b.) acetic acid and ammonia solution

a.) Mg(s) + 2H+ (aq) -> Mg2+ (aq) + H2 (g)
b.) H+ (aq) + NH3(aq) -> NH4+ (aq)

llltkl | Student

When magnesium metal reacts with acetic acid (CH3CO2H, a weak acid), magnesium acetate (a salt) and hydrogen gas is produced. The salt, Mg(CH3CO2)2 is soluble in water because all acetates are soluble. Thus, the complete equation is:

Mg(s) + 2 CH3CO2H(aq)  =  Mg(CH3CO2)2(aq)  + H2 (g)

Since acetic acid is a weak acid it should not be shown dissociated in the total ionic or the net ionic equation.  Mg(CH3CO2)2(salt)  is a strong electro­lytes.  The total ionic equation therefore is:

Mg(s) + 2 CH3CO2H(aq) =Mg˄+(aq) + 2CH3CO2 ˄– (aq) + H2 (g)

Following similar arguments, the total ionic equation of the second reaction can also be obtained.