What type of a reaction is the reaction between the aqueous solutions of sodium carbonate and hydrochloric acid write the balanced equation?

Question 25 Write the balanced chemical equations for the following reactions a Sodium carbonate on reaction with hydrochloric acid in equal molar concentration 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 Cu2I2, liberates iodine gas and also forms potassium sulphate.

Sodium hydrogen carbonate $(N a H C O_{3})$ on reaction with hydrochloric acid $(H C l)$ gives sodium chloride $(N a C l)$ , water $(H_{2} O)$ and liberates carbon dioxide $(C O_{2})$ .

${NaHCO}_{3} + HCl \to NaCl + H_{2} O + {CO}_{2}$

Part (c):

Copper sulphate $(C u S O_{4})$ on treatment with potassium iodide $(K I)$ precipitates cuprous iodide $(C u_{2} I_{2})$ , liberates iodine gas $(I_{2})$ , and also forms potassium sulphate $(K_{2} S O_{4})$ .