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College students weigh magnesium and warmth it in a crucible. The magnesium reacts with oxygen to provide the oxide. College students see there is a rise in mass and may use the outcomes to search out the system of magnesium oxide
The sensible exercise takes round 30–45 minutes, relying on the competence of the category. College students ought to all be standing and may put on eye safety. College students with lengthy hair ought to tie it again.
It’s a good suggestion for college students to apply lifting the lid on and off the crucible and the crucible off the pipe clay triangle earlier than they begin. This has the added bonus of checking that each one the tongs are functioning appropriately.
To allow college students to mild their Bunsen burners they are going to want entry to matches or lighters. Alternatively, mild one or two Bunsen’s across the room and college students can mild their very own utilizing a splint.
Essentially the most important hazard on this experiment is the new equipment. Warn college students that it’s going to take a while to chill down.
For courses with shorter consideration spans, the ultimate step of heating to fixed mass could possibly be omitted.
Tools
Well being, security and technical notes
Process
Instructing notes
College students ought to have recorded the next lots:
This could enable them to calculate the mass of the mass of the magnesium (mass 2 – mass 1) and the mass of the product (mass 3 – mass 1). They may additionally calculate the rise in mass (mass 3 – mass 2), which corresponds to the mass of oxygen.
The equation is:
College students generally get unconvincing outcomes to this experiment. It’s value evaluating what they’ve completed as there are a number of explanation why their outcomes could also be disappointing:
Discovering the system of magnesium oxide – “magnesium ribbon formula”
Methodology one
Methodology two