Question

59. Complete and balance each gas-evolution equation. MISSED THIS? Read Section 5.8; Watch KCV 5.5 a. HBr(aq) + NiS(s) ¡ b. NH4I(aq) + NaOH(aq) ¡ c. HBr(aq) + Na2S(aq) ¡ d. HClO4(aq) + Li2CO3(aq) ¡ Tro, Nivaldo J.. Chemistry (p. 206). Pearson Education. Kindle Edition.

Answer 1

Balanced chemical reaction : It is defined as the number of atoms of individual elements present on reactant side must be equal to the product side.

Double-displacement reaction : It is defined as the reaction in which the cation of two reactants molecule exchange their places to give two different products.

(a) The balanced chemical reaction will be:

`2HBr(aq)+NiS(s)\rightarrow NiBr_2(aq)+H_2S(g)`

(b) The balanced chemical reaction will be:

`NH_4I(aq)+NaOH(aq)\rightarrow NaI(aq)+NH_3(g)+H_2O(l)`

(c) The balanced chemical reaction will be:

`2HBr(aq)+Na_2S(aq)\rightarrow 2NaBr(aq)+H_2S(g)`

(d) The balanced chemical reaction will be:

`2HClO_4(aq)+Li_2CO_3(aq)\rightarrow 2LiClO_4(aq)+CO_2(g)+H_2O(l)`