Once the crucible is being heated over a roaring blue flame in the first experiment, learners can begin the calcium carbonate with hydrochloric acid reaction. ![]() ![]() To fit both activities into one hour in the laboratory it is possible to run both experiments concurrently. The reaction of magnesium with oxygen takes around 30–45 minutes, depending on the competence of the class. Technician notes and integrated instructions are offered for both experiments.
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