Ecology RQP- effect of temperature on the rate of decay of fresh milk by measuring pH change

Question 1

step 1

Answer 1

Place 20 cm3 of fresh milk into three beakers

Question 2

step 2

Answer 2

Decide the three temperatures you will investigate. Write these onto the sides of the beakers. They may be 5, 20 and 35°C.

Question 3

step 3

Answer 3

Use universal indicator paper or solution to determine the pH of the milk in the three beakers

Question 4

step 4

Answer 4

Cover each beaker in cling film and incubate at the appropriate temperature

Question 5

step 5

Answer 5

Use universal indicator paper or solution to determine the pH of the milk in the three beakers after 24, 48 and 72 hours