Chemistry 0620 · IGCSE · The mole and the Avogadro constant

The mole and the Avogadro constant — practice question

Sodium carbonate solution is allowed to react with dilute hydrochloric acid. The reaction equation is shown below. $\text{Na}_2\text{CO}_3(aq) + 2\text{HCl}(aq) \rightarrow 2\text{NaCl}(aq) + \text{CO}_2(g) + \text{H}_2\text{O}(l)$ An excess of sodium carbonate is then added to $10.0\,\text{cm}^3$ of $0.10\,\text{mol dm}^{-3}$ hydrochloric acid. What volume of carbon dioxide gas is produced?

  • A$12\,\text{cm}^3$
  • B$24\,\text{cm}^3$
  • C$12\,000\,\text{cm}^3$
  • D$24\,000\,\text{cm}^3$

Worked solution & mark scheme

This 1-mark question has a full step-by-step worked solution and mark scheme.

  • Full mark scheme, point by point
  • Step-by-step worked solution
  • Write your answer & get it marked instantly by AI