Q25 of 44 Page 5

Write the balanced chemical equations for the following reactions

(a) Sodium carbonate on reaction with hydrochloric acid in equal molar concentrations gives sodium chloride and sodium hydrogen carbonate.


(b) Sodium hydrogen carbonate on reaction with hydrochloric acid gives sodium chloride, water and liberates carbon dioxide.


(c) Copper sulphate on treatment with potassium iodide precipitates cuprous iodide (Cu2 I2), liberates iodine gas and also forms potassium sulphate.


(a) HCl + Na2CO3→ NaCl + NaHCO3
NaHCO3 + HCl → NaCl + H2O + CO2

However, this reaction can be summed up as.


2HCl + Na2CO3→ 2NaCl + H2O + CO2


(b) NaHCO3 + HCl → NaCl + H2O + CO2


(c) 2CuSO4 + 4KI → Cu2I2 + I2 + 2K2SO4


More from this chapter

All 44 →
23

Identify the reducing agent in the following reactions.

(a) 4NH3 + 5O24NO+6H2O


(b) H2O +F2HF + HOF


(c) Fe2O3 + 3CO2Fe + 3CO2


(d) 2H2 + O22H2O

 24

Identify the oxidising agent (oxidant) in the following reactions

(a) Pb3O4 + 8HCl ⎯→ 3PbCl2 + Cl2 + 4H2O


(b) 2Mg + O2⎯→ 2MgO


(c) CuSO4 + Zn ⎯→ Cu + ZnSO4


(d) V2O5 + 5Ca ⎯→ 2V + 5CaO


(e) 3Fe + 4H2 O ⎯→ Fe3O4 + 4H2


(f) CuO + H2⎯→ Cu + H2O

 26

A solution of potassium chloride when mixed with silver nitrate solution, an insoluble white substance is formed. Write the chemical reaction involved and also mention the type of the chemical reaction?

 27

Ferrous sulphate decomposes with the evolution of a gas having a characteristic odour of burning sulphur. Write the chemical reaction involved and identify the type of reaction.