9.19B - **Biology Only** Rate Changes in the Decay Of Biological Material Flashcards
(7 cards)
What is the purpose of the experiment?
To investigate the effects of temperature on decay by measuring the pH change of fresh milk in the presence of the enzyme lipase.
What solution is made for the experiment?
A solution of milk and phenolphthalein indicator.
What is added to the milk solution to make it alkaline?
Sodium carbonate, which causes the solution to appear pink.
What is done with the tube after adding sodium carbonate?
Place the tube in a water bath at a specific temperature.
What is added to the solution to start the experiment?
The lipase enzyme is added, and the stopwatch is started.
What is measured during the experiment?
The time it takes for the pink color to disappear, indicating a decrease in pH.
What is the goal of repeating the experiment at different temperatures?
To determine at which temperature the pink color disappears the quickest, indicating the quickest decomposition.
