Wednesday, 21 June 2017

mumtaz

Chemical
reactions and equation.
Acitivity : to show the burning of magnesium is a chemical change

When a magnesium ribbon is heated ,it burns in air with a dazzling white falme to form a white powder called magnesium oxide. Actually , on heating , magnesium combines with oxygen present in air to form magnesium oxide:
         Magnesium   +   oxygen  ~heat   ~ magnesium oxide
The burning of magnesium in air to form magnesium oxide is an example of a chemical reaction.so,before burning in air ,the magnesium ribbon is cleared by rubbing with a sand paper. This is done to remove the protective layers of basic magnesium carbonate from the surface of magnesium ribbon.

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