Method Step 3:
- place the magneisum of in the Crucible.
- Place the Crucible on top of the pipe clay triangle.
- Turn the bunsen burner on to a safe flame by moving the metal to close the hole in the bunsen burner.
- When you turned on the gas, open the hole and start the experiment.
- Cut a piece of magnesium about 10-15 cm long
- Take a piece of Magnesium ribbon and Weigh it. That will be [mass 1]
- After the experiment, weigh magnesium [what is left of it]
- put it into table to see the difference
Method Step 2:
Method Step 1:
- Take a heat resistant mat and place it on the desk.
- On top of that, in the middle place a bunsen burner and plug it into the generator of gas.
- On top of the mat also place a tripod as shown on the picture.
- Take the pipe clay triangle and place it on top of the tripod, right in the middle.
Equipment:
- as you have seen from the video;
- After the expereiment, the magnesium ribbon was burned with oxygen giving a compound of magnesium oxide [ 2MgO ].
- This is a highly exothermic reaction, giving off intense heat and light.
- the colour goes from shiny silver to a white-silver substance
- Magnesium ribbon(10-15cm)
- Eye protection
- Crucible with lid
- Tongs
- Tripod
- Heat resistant mat
- Balance (2 d.p.)
- Pipe clay triangle
- Bunsen burner
Health & Safety
- Wear goggles..
- Do not look directly at the light emitted from the metal, It might cuase temporary loss of sight.
- Keep away from combustible materials. (combustible means catch on fire or burn easily)
Aims:
Our aim for this experiment is to see the differences of magnesium after the reaction with oxygen when burnt (oxidation). For example: the colour change, the mass, and the shape.
magnesium + oxygen = magnesium oxide
Mg (s) + O2 (g) = MgO (s)
http://www.rsc.org/learn-chemistry/resource/res00000718/the-change-in-mass-when-magnesium-burns?cmpid=CMP00005934
http://chemwiki.ucdavis.edu/Under_Construction/Demonstrations/Burning_Magnesium
http://www4.ncsu.edu/~franzen/public_html/Outreach/Oxidation_Demonstration.pdf
http://lecturedemos.chem.umass.edu/chemReactions4_1.html
http://www.bbc.co.uk/education/guides/zqd2mp3/revision/4
Magnesium in reaction with Oxygen