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(a) Substitute formulae for names and balance the following equations: Calcium carbonate reacts with hydrochloric acid to produce calcium chloride, water and carbon dioxide gas. (b) Write balanced chemical equation with state symbols for the following reaction: Sodium hydroxide solution reacts with hydrochloric acid solution to produce sodium chloride solution and water.

ChemistryClass 10ICSEAnswered 27 Mar 2026
Answer

(a) CaCO3 + 2HCl → CaCl2 + H2O + CO2

(b) NaOH (aq) + HCl (aq) → NaCl (aq) + H2O (l)

Chemistry · Class 10