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Answer each question and check where every mark went.
- 1
Question 1
A student makes a sample of insoluble barium sulfate by adding excess aqueous barium chloride to aqueous sodium sulfate. The mixture is stirred, then filtered to collect the solid.
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10 marksOpen › - 2
Question 2
A student uses a burette to add dilute hydrochloric acid to 25.0 cm³ of aqueous sodium carbonate with an indicator, until the end-point is reached. The experiment is done three times.
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10 marksOpen › - 3
Question 3
A student dissolves anhydrous lithium chloride in water in an insulated cup and records the temperature of the mixture as it warms up. The results have been plotted and a line of best fit drawn, shown in Fig. 3.1. Use the graph to answer the questions below.
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10 marksOpen › - 4
Question 4
A student identifies an unknown salt and then plans an investigation. A reference table of tests and results is provided.
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10 marksOpen ›