Question

Write the balanced chemical equation for the following and identify the type of
reaction in each case.
(a) Potassium bromide(aq) + Barium iodide(aq) → Potassium iodide(aq) +
Barium bromide(s)
(b) Zinc carbonate(s) → Zinc oxide(s) + Carbon dioxide(g)
(c) Hydrogen(g) + Chlorine(g) → Hydrogen chloride(g)
(d) Magnesium(s) + Hydrochloric acid(aq) → Magnesium chloride(aq) + Hydrogen(g)
​

Answer 1

Answer:

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

2KBr(aq) + BaI2(aq) → 2KI(aq) + BaBr2(s)

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

ZnCO3(s) →ZnO(s) + CO 2(g)

(c) Hydrogen(g) + Chlorine(g) → Hydrogen chloride(g)

H2(g) + Cl2(g) → 2HCl (g)

(d) Magnesium(s) + Hydrochloric acid(aq) → Magnesium chloride(aq) + Hydrogen(g)

Mg(s) + 2HCl (aq) → MgCl2(aq) +H2(g)

Explanation:

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

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

c)In this reaction, two different reactants react with each other to form a single product. Hence, it is called a combination reaction.

d) In this reaction, more reactive Mg is replacing less reactive H. Hence, it is displacement reaction.