NCERT Solution for Class 10 Science Chapter 1
Chemical Reactions and Equations
Intext Questions
Page No-6
Questions No-3
(i) Solutions of barium chloride and sodium sulphate in water react
to give insoluble barium sulphate and the solution of sodium
chloride.
(ii) Sodium hydroxide solution (in water) reacts with hydrochloric
acid solution (in water) to produce sodium chloride solution and
water.
(i) BaCl₂(aq)+Na2SO₄(aq) → BaSO₄(s) +2NaCl(aq)
(ii) NaOH(aq) + HCl(aq) → NaCl(aq)+H₂O(l)
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(i) BaCl2(aq)+NaSO4→BaSO4(S)+2NaCl(aq)
(ii) NaOH(aq)+HCl(aq)→Nacl(aq)+H2O(l)
The balanced chemical equation for the reaction between solutions of barium chloride and sodium sulfate is:
BaCl₂(aq) + Na₂SO₄(aq) → BaSO₄(s) + 2NaCl(aq)
In this equation:
» BaCl₂ is barium chloride.
» Na₂SO₄ is sodium sulfate.
» BaSO₄ is barium sulfate, which is insoluble and forms a solid precipitate.
» NaCl is sodium chloride, which remains in solution.
» The state symbols indicate the physical states of each substance:
» (aq) denotes an aqueous solution (dissolved in water).(s) indicates a solid precipitate.
» (s) indicates a solid precipitate.