Magnesium Oxide Experiment Procedures

This video tutorial guides students through determining the empirical formula of magnesium oxide by combusting magnesium in an oxygen-rich environment. It covers the initial setup, including weighing the crucible and magnesium ribbon, and provides detailed instructions for safely conducting the combustion reaction. The tutorial emphasizes the importance of allowing oxygen flow and monitoring the reaction to prevent product loss. After the reaction, students learn to cool the crucible, add water to form a paste, reheat to complete the reaction, and weigh the final product. Safety precautions and proper handling techniques are highlighted throughout.

What is the first step in preparing for the magnesium oxide experiment?

• Light the Bunsen burner

• Clean and weigh the crucible and lid

• Weigh the magnesium ribbon

• Add water to the crucible

Why should the magnesium ribbon not be wrapped too tightly?

• To allow air to reach it for the reaction

• To ensure it fits in the crucible

• To prevent it from breaking

• To make it easier to weigh

What safety precaution should be taken when lighting the Bunsen burner?

• Wear gloves

• Keep flammable items away

• Wear a face mask

• Use a fire extinguisher

What indicates that the magnesium has ignited in the crucible?

• The crucible starts to glow

• The magnesium ribbon changes color

• Smoke is produced

• The crucible lid pops off

How can you ensure oxygen enters the crucible during the reaction?

• By adding more magnesium

• By adding water to the crucible

• By increasing the Bunsen burner flame

• By tilting or lifting the lid slightly

What should you do if smoke is observed during the reaction?

• Increase the flame intensity

• Add more magnesium

• Cover the crucible completely

• Adjust the lid to reduce smoke

What is the purpose of adding water to the crucible after the reaction?

• To form a paste with the solid

• To cool the crucible

• To clean the crucible

• To dissolve the magnesium oxide

What is the final step after reheating the crucible with the paste?

• Reignite the Bunsen burner

• Weigh the crucible and contents

• Add more water

• Remove the magnesium oxide

How do you know when the magnesium oxide formation is complete?

• The paste turns light gray

• The crucible stops glowing

• The Bunsen burner flame changes color

• The crucible lid falls off

What should be done with the crucible after the experiment is complete?

• Dispose of it safely

• Store it with the product inside

• Clean and scrub it thoroughly

• Leave it to dry naturally