Activity & Practical Of Burning Magnesium ribbon in a Bunsen flam | Class 10th level | edugrown
When magnesium ribbon burns in oxygen, magnesium oxide is formed with the production of dazzling white light. After it burns, the white powder of magnesium oxide gets formed
Aim
Burning Magnesium ribbon in a Bunsen flame:.
MATERIALS REQUIRED
Apparatus
Chemicals
- Magnesium ribbon, about 10–15 cm
THEORY
Burning Magnesium Ribbon: Are students allowed to burn magnesium ribbon in a Bunsen
burner flame using tongs as a class activity or should it just be a teacher demo? I know that
people should not look directly at the burning ribbon. Also, is it okay to burn it in a crucible?
The flare from most chemicals burned in a Bunsen flame is usually of short duration and
therefore is unlikely to pose any real hazard. The exception is burning magnesium ribbon,
which burns with a light of high intensity and heat. Watching a magnesium fire can cause
eye damage.
Burning small pieces of magnesium ribbon held with tongs over a Bunsen flame is
recommended to only be done as a teacher DEMONSTRATION not as a class activity—a sitespecific
risk assessment should be carried out and safety procedures and guidelines followed
as detailed below:
Be aware that burning magnesium produces a lot of heat and a white flame that emits
ultraviolet light.
Wear safety glasses.
The piece of magnesium ribbon should be no more than 2cm in length.
Use crucible tongs to hold the piece of magnesium ribbon over the Bunsen burner flame
to light it, or suspend the strip of magnesium over the Bunsen burner flame using a
laboratory stand and clamp.
Students should sit no closer than 2–3 m from the flame.
Students are instructed NOT to look or stare directly at the burning metal, observation
should be from the side (i.e., using peripheral vision) due to the risk of eye damage.
Avoid breathing in the smoke from the burning magnesium ribbon.
The following information is from the ChemSupply SDS:
Highly flammable in the presence of open flames and sparks, or heat
Flammable solid. Contact with moisture or water liberates flammable gases
Ignites readily, burns with intense white light and heat
Watching a magnesium fire can cause eye injury
The burning of magnesium is a reaction between the metal magnesium and oxygen in the air.
A chemical change occurs forming a new compound: magnesium oxide.
PROCEDURE
Take a piece of magnesium ribbon about 15 cm long and roll it into a tight coil.
2. Weigh an empty crucible with lid and record its mass.
3. Place the coil of magnesium ribbon into the crucible, weigh the crucible, lid and
magnesium and record this mass.
4. Place the crucible on a pipe clay triangle on a tripod stand and heat over a bunsen
burner.
5. Heat for 1 minute, then carefully lift the lid slightly with tongs. The magnesium will burst
into flames as the air reaches it. Do not let any white smoke escape and replace the lid.
This will prevent any loss of product (magnesium oxide).
6. Lift the lid periodically over 5 minutes to ensure an adequate supply of oxygen.
7. Let the crucible cool. When it is cool, weigh it. Record the mass of the crucible, lid and
magnesium oxide. (Take care that a hot crucible is not placed on a plastic pan top of the
balance or the plastic may melt.)
OBSERVATIONS
RESULT
Also Magnesium oxite is a metal oxide so the oxide are Basic In nature and it is react with acid to form salt and water
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