Chemistry 5070 · O Level · Rate of reaction

Rate of reaction — practice question

When calcium carbonate reacts with dilute hydrochloric acid, carbon dioxide is formed. The carbon dioxide is gathered with the apparatus shown. The reaction is carried out four times. In each reaction, $25\,\text{g}$ of calcium carbonate and an excess of hydrochloric acid are used. Which reaction mixture fills the gas syringe with carbon dioxide in the shortest time?

  • Alumps of calcium carbonate with $1\,\text{mol dm}^{-3}$ hydrochloric acid
  • Blumps of calcium carbonate with $2\,\text{mol dm}^{-3}$ hydrochloric acid
  • Cpowdered calcium carbonate with $1\,\text{mol dm}^{-3}$ hydrochloric acid
  • Dpowdered calcium carbonate with $2\,\text{mol dm}^{-3}$ hydrochloric acid

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