Rates of Reaction - method 2

• What is the second method of rate of reaction?


  • using a measuring cylinder place 50cm3 of hydrochloric acid into a conical flask
  • attach conical flask to bung and delivery tube - place delivery tube into container filled with water
  • then place a upturned measuring cylinder also filled with water over the delivery tube
  • add 3cm strip of magnesium to hydrochloric acid and start a stopwatch - reaction produces hydrogen gas (trapped in measuring cylinder)
  • continue till no more hydrogen is given off
  • repeat using different hydrochloride acid concentrations
• What is the word equation for this reaction ?

  Magnesium + hydrochloric acid -> magnesium chloride + hydrogen
• What does this reaction show?


  This is shown by two different experiments having the same results (reproductible)

  Greater the concentration - faster reaction takes place