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A student carried out an experiment to find the temperature rise for a reaction between hydrochloric acid and sodium hydroxide solution - AQA - A-Level Chemistry - Question 4 - 2018 - Paper 3
Question 4
A student carried out an experiment to find the temperature rise for a reaction between hydrochloric acid and sodium hydroxide solution. - The student used a measur... show full transcript
Worked Solution & Example Answer:A student carried out an experiment to find the temperature rise for a reaction between hydrochloric acid and sodium hydroxide solution - AQA - A-Level Chemistry - Question 4 - 2018 - Paper 3
Step 1
Plot a graph of temperature against time
Answer
-
Begin by marking the temperature values on the Y-axis and the time intervals on the X-axis, using the grid provided.
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Plot the points for each time and corresponding temperature from Table 3:
- (0, 19.8)
- (1, 19.8)
- (2, 19.8)
- (3, 19.8)
- (4, 21.6)
- (5, 21.7)
- (6, 21.5)
- (7, 21.4)
- (8, 21.3)
- (9, 21.2)
- (10, 21.1)
- (11, 21.1)
- (12, 21.1)
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After marking the points, draw suitable lines to connect the points accurately. It helps to smooth the curve as you create the line of best fit, considering the nature of the reaction and temperature change.
-
Extend the lines to determine the value of the temperature at the fourth minute by extrapolating from the trend observed.
Step 2