SSCE VCE Biology Scientific Investigation and Research Methods: Lipase catalyses the breakdown o

Question

Lipase catalyses the breakdown of fats into glycerol and fatty acids.
Fatty acids can neutralise an alkaline solution.
Sodium carbonate is an alkaline solution.

Student 1 set up four test tubes each containing 5 mL of a fatty solution and 10 mL of sodium carbonate solution. Each test tube was suspended in a water bath. Each water bath was set at a different temperature. pH probes were placed into each test tube. Each solution had a pH of 8.

Student 1 timed how long it took for the pH of the solution to become neutral (pH of 7).
Student 1 repeated the experiment so that she had three measurements for each temperature. She obtained the data shown in Table 1.

Table 1. Results from Student 1

Temperature (°C)	Time taken for solution to become neutral (seconds)
				Measurement 1	Measurement 2	Measurement 3
5			240		238		241
15			229		230		226
25			200		201		202
35			180		181		180

Student 1 was concerned about the precision of her measurements.
Analyse the data above and state the temperature at which the measurements are the most precise. Justify your response.

Lipase catalyses the breakdown of fats into glycerol and fatty acids - VCE - SSCE Biology - Question 11 - 2019 - Paper 1

Worked Solution & Example Answer:Lipase catalyses the breakdown of fats into glycerol and fatty acids - VCE - SSCE Biology - Question 11 - 2019 - Paper 1

State the temperature at which the measurements are the most precise.

Justify your response.

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