Rates of Reaction Required Practicals

Rate of Reaction Practical 1

  1. Place a printed black cross onto a white tile
  2. Place a conical flask on top of the tile
  3. Add 10cm3 Hydrochloric Acid into a conical flask
  4. Add 10cm3 Sodium thiosulphate into the conical flask and immediately start a stopwatch
  5. Look down through the conical flask to the cross on the tile below
  6. Stop the stopwatch when the tile is no longer visible. Record the time taken
  7. Repeat this experiment twice more and calculate the average time taken
Safety Concerns
  • Glass can smash
  • Wear goggles when looking through conical flask
  • HCL is corrosive



Rate of Reaction Practical 2

  1. Set up a conical flask containing 50dm3 of 1.0M Hydrochloric Acid sealed with a bung with a delivery tube connecting to an up-turned, water-filled measuring cylinder placed in a water-filled container
  2. Add a 3cm long strip of Magnesium to the conical fask and quickly reseal with the bung. Immeditely start the stopwatch
  3. Record the volume of Hydrogen accumulating at the top of the measuring cylinder every 10 seconds until no more gas is given off
  4. Repeat the experiment using different concentrations of Hydrochloric Acid
Safety Concerns
  • Glass can smash
  • HCL is corrosive