Page 407 - SUBSEC October 2017_Neat

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2. A student is required to investigate the rate of reaction in which a fixed mass of magnesium
metal (0.12 g) is added to different volumes of 1.5 mol dm hydrochloric acid. The acid is
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added from a burette and water added to make the final volume of 50 cm . The time taken for
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the magnesium ribbon to disappear is recorded. Figure 1 below shows the burette reading for the
volume of acid added and the time taken for the magnesium to disappear for each reaction. The
initial burette reading is always 0.0 cm . DO NOT WRITE IN THIS AREA
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Figure 1 DO NOT WRITE IN THIS AREA

(a) From the results shown in Figure 1, construct a table to show experiment number, volume
of acid added from the burette, volume of water added to the acid, and the time taken for
the magnesium to disappear.

[5 marks] DO NOT WRITE IN THIS AREA

(b) On the graph paper on page 7, plot a graph of time taken for the magnesium ribbon to
disappear against volume of acid added from the burette. [5 marks]
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