Question

3.Write the balanced chemical equations for the following reactions-

a) calcium hydroxide +. Carbon dioxide ------→calcium carbonate +water

b)Zinc +. Silver nitrate-------→ zinc nitrate + silver.​

Answer 1

a)calcium hydroxide +. Carbon dioxide ------→calcium carbonate +water

(a) Answer:

The representation of a chemical reaction in the form of substances is known as a chemical equation. The equation in which the number of atoms of all the molecules is equal on both sides of the equation is known as a balanced chemical equation.

Balanced chemical equation

• Calcium hydroxide + Carbon dioxide → Calcium carbonate + Water
• $Ca(OH)2 + CO2 → CaCO3 + H2O$
• Zinc + Silver nitrate → Zinc nitrate + Silver
• $Zn + 2AgNO3 → Zn(NO3)2 + 2Ag$
• Aluminium + Copper chloride → Aluminium chloride + Copper
• 2Al + 3CuCl2→ 2AlCl3+ 3Cu
• Barium chloride + Potassium sulphate → Barium sulphate + Potassium chloride

• $BaCl2+ K2SO4 → BaSO4 + 2KCl$

b)Zinc +. Silver nitrate-------→ zinc nitrate + silver.​

b) Answer:

Zinc + Silver nitrate → Zinc nitrate + Silver

Zn(s) + 2AgNO3(s) → Zn(NO3)2 + 2Ag

Zinc leads to the formation of zinc nitrate with silver nitrate and provides silver as a byproduct during or at the end of the process. The process happens since zinc, that leads to zinc nitrate, is much more reactive than silver, and this, in turn, creates silver. In particular, this process is a substitution reaction where zinc is substituted in place of silver.