Chemistry itself knows altogether too well that - given the real fear that the scarcity of global resources and energy might threaten the unity of mankind - chemistry is in a position to make a contribution towards securing a true peace on earth.
~Kenichi Fukui

Wednesday, 13 February 2013

Practical - Chemical and Physical Changes

Activity 1: Heating and cooling solids (Sodium chloride, Copper (II) carbonate and magnesium)

Sodium chloride and copper (II) carbonate upon cooling 


Magnesium Ribbon during heating

Activity 2: Electrolysis 

Electrolysis of sodium chloride - bubbles are formed on both carbon plates but more bubble are formed on the carbon plate connected to the negative terminal


Teacher's demonstration

Sublimation of grey solid iodine to purple gas

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