Combined Science: Trilogy > AQA Question Papers > AQA GCSE COMBINED SCIENCE: TRILOGY Higher Tier Chemistry Paper 2H (All)
AQA GCSE COMBINED SCIENCE: TRILOGY Higher Tier Chemistry Paper 2H
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GCSE AQA COMBINED SCIENCE: TRILOGY Higher Tier Chemistry Paper 2H A student investigated the reaction between magnesium and excess hydrochloric acid. Figure 1 shows the apparatus. Figure 1 Th... is is the method used. 1. Pour 50 cm3 of hydrochloric acid into a conical flask. 2. Add a piece of magnesium. 3. Insert stopper and delivery tube and start a timer. 4. Collect the gas produced in a gas syringe. 5. Record the volume of gas produced every 20 seconds for 2 minutes. 6. Repeat steps 1 to 5 with higher concentrations of hydrochloric acid. 0 1 . 1 Give the independent variable and one control variable in this investigation. [2 marks] Independent variable Control variable Question 1 continues on the next page 4 *04* IB/M/Jun21/8464/C/2H Do not write outside the Table 1 shows the results from the first experiment using hydrochloric acid with a box low concentration. Table 1 Time in seconds 0 20 40 60 80 100 120 Volume of gas in cm3 0 48 72 90 97 98 98 0 1 . 2 Complete Figure 2. You should: • plot the data from Table 1 (the point 0,0 has been plotted for you) • draw a line of best fit. [3 marks] [Show More]
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