Question

Write the balanced chemical equations for the following chemical
reactions.
(i) Potassium bromide reacts with Barium iodide
(ii) Zinc carbonate is heated

Answer 1

Answer:

2KBr + BaI2 --> 2KI + BaBr2

ZnCO3 --> ZnO + CO2

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Answer 2

Answer:

(a) Potassium bromide(aq) + Barium iodide(aq) → Potassium iodide(aq) + Barium bromide(s)

2KBr(aq) +BaI2(aq)→2KI(aq) +BaBr2(s)

In this reaction, both the reactants exchanges ions to for two new products, hence, it is a double displacement reaction.

(b) zinc carbonate(s) → Zinc oxide(s) + Carbon dioxide(g)

ZnCO3(s)→ZnO(s)+CO2(g)

In this reaction, a single substance yields two different product. hence, it is a decomposition reaction