Question

15.

Does a reaction occur when aqueous solutions of cobalt(II) chloride and iron(III) nitrate are combined?

yesno

If a reaction does occur, write the net ionic equation.

16.

Does a reaction occur when aqueous solutions of potassium phosphate and chromium(III) chloride are combined?

yesno

If a reaction does occur, write the net ionic equation.

17.

Does a reaction occur when aqueous solutions of silver(I) nitrate and barium chloride are combined?

yesno

If a reaction does occur, write the net ionic equation.

Answer 1

15 )

When Cobalt (II) chloride is combined with iron (III) nitrate possible products are Cobalt (II) nitrate and iron (III) chloride. Both products are ionic compounds & they are present in the form of ions in the solution. Both reactants are also ionic ionic compounds & they are present in the form of ions in the solution. We get same ions before & after reaction, hence we can assume, there is no reaction.

CoCl ₂ (aq) + Fe (NO₃) ₃ (aq) $\rightarrow$ No reaction

16) When potassium phosphate & Chromium ( III ) chloride are combined , we get two possible products one is Chromium (III) phosphate & potassium chloride. Chromium (III) phosphate is insoluble compound in water. Hence, we in this case reaction occurs.

Molecular equation : K₃PO₄ (aq) + CrCl ₃ (aq) $\rightarrow$ CrPO ₄ (s) + 3 KCl (aq)

Net ionic equation : Cr ³⁺ (aq) + PO ₄^3- (aq)  $\rightarrow$ CrPO ₄ (s)

17 ) When silver nitrate is combined with Barium (II) chloride reaction is possible. we get insoluble AgCl and Barium (II) nitrate .

Molecular equation : 2 AgNO₃ (aq) + BaCl ₂ (aq) $\rightarrow$ 2 AgCl(s) +Ba(NO₃) ₂ (aq)

Net ionic equation : Ag ⁺ (aq) + Cl ^- (aq)  $\rightarrow$ AgCl(s)