what happens to the mass when magnesium ribbon is added to copper sulphate solution. a increase b decreases or c remain. Why
Answers
Answer :
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.
To enable students to light their Bunsen burners they will need access to matches or lighters. Alternatively, light one or two Bunsen’s around the room and students can light their own using a splint.
The most significant hazard in this experiment is the hot apparatus. Warn students that it will take some time to cool down.