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a. Nickel (II) Chloride dissolves in water to form a light green solution. What ions are...

a. Nickel (II) Chloride dissolves in water to form a light green solution. What ions are present in solution? - that is, what is 'swimming around' in the aqueous solution? Write the formulas.

b. Sodium Carbonate dissolves in water to form a colorless solution. What ions are in solution? Write the formulas.

c. When solutions of nickel (II) chloride and sodium carbonate are combined, a green nickel (II) carbonate precipitate forms. What is the formula of the precipitate?

d. Write the ionic equation representing (1) the reactants as they exist in solution before the reaction and (2) the products as they exist in solution after the reaction.

e. What spectator ions remain in solution in the reaction mixture?

f. Write the net ionic reaction that accounts for the appearance for the precipitate.

If anyone could help me, I'd really appreciate it!

Solutions

Expert Solution

a. Nickel (II) Chloride dissolves in water to form a light green solution. What ions are present in solution? - that is, what is 'swimming around' in the aqueous solution? Write the formulas.

NiCl2 (aq) Ni2+(aq) + 2 Cl- (aq)

The ions in solution are Ni2+(aq) and Cl- (aq)

b. Sodium Carbonate dissolves in water to form a colorless solution. What ions are in solution? Write the formulas.

Na2CO3 (aq) 2 Na+ (aq) + CO32-(aq)

The ions in solution are Na+ (aq) + CO32-(aq)

c. When solutions of nickel (II) chloride and sodium carbonate are combined, a green nickel (II) carbonate precipitate forms. What is the formula of the precipitate?

The precipitate will have the formula NiCO3(s) where both the ions are in the same oxidation states.

d. Write the ionic equation representing (1) the reactants as they exist in solution before the reaction and (2) the products as they exist in solution after the reaction.

The reactants in solution are nickel (II) chloride and sodium carbonate

Ni2+(aq) + 2Cl-(aq) and 2Na+(aq) + CO32- (aq)

After the reaction NiCO3(s) precipitates out and  2Cl-(aq) and 2Na+(aq) are in solution.

e. What spectator ions remain in solution in the reaction mixture?

The spectator ions in solution are 2Cl-(aq) and 2Na+(aq)

f. Write the net ionic reaction that accounts for the appearance for the precipitate.

Ni2+(aq) + 2Cl-(aq) + 2Na+(aq) + CO32- (aq) NiCO3(s) + 2Na+(aq)+ 2Cl-(aq)

queen_honey_blossom answered 2 years ago
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