Photosynthesis practical

• Photosynthesis practical

  1. Using measuring cylinder pour 40cm^3 of sodium hydroxide carbonate into a test tube
  2. Place pondweed into the test tube
  3. Leave pondweed to acclimatise for about 5 minutes
  4. Start stopwatch and count the number of bubbles per minute
  5. Repeat 2 more times for a mean
  6. Repeat steps 2-5 for different distances from light source
  7. Using the collected data, plot a graph
• Safety precautions for photosynthesis practical:

  -allergy risk from pondweed

  -lamp may be hot

  -make sure to keep water away from electrical outlets
• Sources of error for photosynthesis practical:

  -temperature may also be a factor affecting rate of photosynthesis

  -bubbles may be produced to quickly to be counted