1. Add some dilute sulfuric acid to a small beaker. 2. Add some hot water from a kettle to larger beaker or water bath. Place the beaker of sulfuric acid into the hot water to warm up the acid.

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Speaker one Measure 40 cubic centimetres of the sulfuric acid. This is your limiting reactant. All of the acid needs to react during this experiment. That ensures we have pure crystals formed.