Question 8:

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

(a) 2KBr_(aq) + BaI_2(aq) → 2KI_(aq) + BaBr_2(s); Double displacement reaction

(b) ZnCO_3(s) → ZnO_(s) + CO_2(g); Decomposition reaction

(c) H_2(g)+ Cl_2(g) → 2HCl_(g); Combination reaction

(d) Mg_(s) + 2HCl_(aq) → MgCl_2(aq) + H_2(g); Displacement reaction

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