Question

0.75 grams of magnesium was heated in air. 1.25 grams of magnesium oxide was formed. How much oxygen is needed to obtain 1.25 grams of magnesium oxide

Answer 1

Answer:

#BINOD BINOD BINOD BINOD

Answer 2

Students weigh magnesium and heat it in a crucible. The magnesium reacts with oxygen to produce the oxide. Students see there is an increase in mass and can use the results to find the formula of magnesium oxide.

The practical activity takes around 30–45 minutes, depending on the competence of the class. Students should all be standing and should wear eye protection. Students with long hair should tie it back.

It is a good idea for students to practice lifting the lid on and off the crucible and the crucible off the pipe clay triangle before they start. This has the added bonus of checking that all the tongs are functioning correctly.

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