When dilute hydrochloric acid (HCl) is added to different substances, various chemical reactions occur. Here’s a brief explanation of what happens with each substance and the balanced chemical equations:
(i) Bleaching Powder (Calcium Hypochlorite):
When dilute hydrochloric acid is added to bleaching powder, it reacts to form chlorine gas, water, and calcium chloride.
Balanced Equation:
Ca(OCl)2 + 4HCl → CaCl2 + 2Cl2 + 2H2O
(ii) Zinc Granules:
Adding dilute hydrochloric acid to zinc granules produces zinc chloride and hydrogen gas.
Balanced Equation:
Zn + 2HCl → ZnCl2 + H2↑
(iii) Baking Soda (Sodium Bicarbonate):
When dilute hydrochloric acid is added to baking soda, it reacts to form sodium chloride, carbon dioxide gas, and water.
Balanced Equation:
NaHCO3 + HCl → NaCl + CO2↑ + H2O