I missed class sessions for the balancing of these type of equations, and do not

Question

I missed class sessions for the balancing of these type of equations, and do not understand what they are asking about the reactions. Any help would be appreciated.

*****Suppose a solution of lead(II) nitrate is mixed with a solution of hydrochloric acid, and a white precipitate of PbCl2 forms.

Which representation of the lead(II) nitrate solution is the most chemically accurate?

Select one:

a. Pb2+(aq) + 2NO3-(aq)

b. Pb(NO3)2(aq)

c. PbNO3+(aq) + NO3-(aq)

d. Pb+(aq) + NO3-(aq)

Which representation of the hydrochloric acid solution is the most chemically accurate?

Select one:

a. H3O+(aq) + Cl-(aq)

b. HCl(aq)

c. Cl+(aq) + H-(aq)

d. H3O+(aq) + Cl2(aq)

After the reaction is complete, what are the principal species present in the solid phase?

Select one:

a. Pb(NO3)2(s) only

b. PbCl2(s) only

c. PbCl2(s) and Pb(NO3)2(s)

d. PbCl2(s) and HCl(s)

After the reaction is complete, what are the principal species present in the aqueous phase?

Select one:

a. NO3-(aq)

b. Cl-(aq)

c. H3O+(aq)

d. H3O+(aq) and NO3-(aq)

Which is the balanced net ionic chemical equation for this reaction?

Select one:

a. Pb2+(aq) + 2Cl-(aq) PbCl2(s)

b. NO3-(aq) + H+(aq) HNO3(s)

c. 2NO3-(aq) + Pb2+(aq) Pb(NO3)2(s)

d. Pb(NO3)2(aq) + 2HCl(aq) PbCl2(s) + 2HNO3(aq)

Explanation / Answer

1) Which representation of the lead(II) nitrate solution is the most chemically accurate?

a. Pb2+(aq) + 2NO3-(aq)

2) Which representation of the hydrochloric acid solution is the most chemically accurate?

a. H3O+(aq) + Cl-(aq)

3) After the reaction is complete, what are the principal species present in the solid phase?

b. PbCl2(s) only

4) After the reaction is complete, what are the principal species present in the aqueous phase?

d. H3O+(aq) and NO3-(aq)

5) Which is the balanced net ionic chemical equation for this reaction?

a. Pb2+(aq) + 2Cl-(aq) PbCl2(s)

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