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write ionic and net ionic equations for the following
reactions:
(a) na2s(aq) + zncl2(aq) →
(b) k3po4(aq) + 3sr(no3)2(aq) →→
(c) mg(no3)2(aq) + 2naoh(aq) →

(a)  

First, write the balanced equation as follows:

Na2S(aq) + ZnCl2(aq) -> 2 NaCl(aq) + ZnS  (s)

Then, rewrite the equation so that all dissolved compounds are separated into their constituted ions. This is called, total ionic equation:

Finally, cancel the ions that appear both in reactants and products. This is called, net ionic equation:

(b)

Balanced equation:

2 K3PO4(aq) + 3Sr(NO3)2(aq) -> Sr3(PO4)2 (s) + 6 KNO3 (aq)

Total ionic equation:

Net ionic equation:

(c)

Balanced equation:

Mg(NO3)2(aq) + 2NaOH(aq) -> Mg(OH)2 (s) + 2 NaNO3 (aq)

Total ionic equation:

Net ionic equation:

the answer to this question is 3.

because of all the things that happen around the us, many people get into arguments which sadly could get physical, but we should actually make a change for that.