CHAPTER-1 Chemical Reactions and Equations
Short Answer Questions
QUESTION-25
- 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 hydrogencarbonate.
(b) Sodium hydrogencarbonate 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.
SOLUTION
(a) Na2CO3 + HCl → NaCl + NaHCO3
(b) NaHCO3 + HCl → NaCl + H2O + CO2
(c) 2CuSO4+4Kl →2K2SO4+CU2I2+I2