3. Determine if a chemical reaction occurs in the following. If a reaction occur
ID: 713766 • Letter: 3
Question
3. Determine if a chemical reaction occurs in the following. If a reaction occurs identify the solid and the color of the solid. a. Aqueous solutions of sodium carbonate and calcium bromide mix. b. Aqueous solutions of zinc sulfate and sodium sulfate mix. Aqueous solutions of potassium chromate and barium chloride mix. c. d. Aqueous solutions of calcium chloride and silver nitrate mix. 4. For the reactions in problem 3 write a balanced molecular equation, balanced ionic equation, net ionic equation, and the spectator ions. Include physical states.Explanation / Answer
Q.3 Spectator ions are those ions that exists in the same form on both sides of reactants and product of a chemical reaction and these ions are ignored while writting chemical equation.
a) Na2CO3 (aq)+ CaCl2 (aq)-------- CaCO3(s)+ 2NaBr (aq)
white colour
b) ZnSO4 + NaSO4 -------- no reaction
c) BaCl2 (aq) + K2CO3 (aq) -------- Ba(CO3)2 (s) + 2KCl (aq)
white colour
d) AgNO3(aq) + CaCl2 (aq) -------- 2AgCl (s) + Ca(NO3)2
white colour
Q.4 a) Balanced molecular equation :- Na2CO3 (aq)+ CaBr2 (aq)-------- CaCO3(s)+ 2NaBr (aq)
Balanced ionic equation :- 2Na+ (aq) + CO2-3 (aq)+ Ca2+ (aq) + 2Br- (aq)-------- CaCO3(s)+ 2Na+(aq) + 2Br- (aq)
Net ionic equation :-CO2-3 (aq)+ Ca2+ (aq) ---------- CaCO3(s)
Spectator ions:-Na+(aq) + Br- (aq)
c) Balanced molecular equation :-BaCl2 (aq) + K2CO3 (aq) -------- Ba(CO3)2 (s) + 2KCl (aq)
Balanced ionic equation :-Ba2+ (aq)+ 2Cl- (aq) + 2K+ (aq) + CO2-3 (aq) -------- Ba(CO3)2 (s) + 2K+ (aq) + 2Cl- (aq)
Net ionic equation :-Ba2+ (aq) + CO2-3 (aq) -------- Ba(CO3)2 (s)
Spectator ions:- K+ (aq) + Cl- (aq)
d) Balanced molecular equation :- AgNO3(aq) + CaCl2 (aq) -------- 2AgCl (s) + Ca(NO3)2
Balanced ionic equation :-2Ag+(aq) + 2NO-3(aq) +Ca2+ (aq) + 2Cl- (aq) -------- 2AgCl (s) + Ca2+(aq) + 2NO-3 (aq)
2Ag+(aq) + 2Cl- (aq) -------- 2AgCl (s)
Net ionic equation :- Ag+(aq) + Cl- (aq) -------- AgCl (s)
Spectator ions:-Ca2+(aq) + NO-3 (aq)
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