Decay

• What is the process to test how temperature affects the rate of decay in milk

  • Make a solution of milk and phenolphthalein indicator
  • Add sodium carbonate to the solution which turns it pink
  • Place the tube in a water bath at a specific temperature wait for it to acclimatise
  • Add lipase enzyme and begin a stopwatch
  • Record how long it takes for the pink to disappear (PH is acidic)
  • Record this for different temperatures to see the rate of decay