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Iodine is a definite kind of matter , distinguished from other kinds by its lustre ,
greyish purple colour , opacity , easy solubility in alcohol with production of a
reddish brown liquid , and by the fact that when a drop or two of this liquid is
added to a ...
3 , the water - gas ( or steam ) produced by heating the water is condensed to
liquid water which is found in the small flask . But water may also be chemically
changed . An electric current is passed through water to which some sulphuric
To prove that copper could be changed into iron , the alchemist placed a piece of
copper in aqua fortis ( nitric acid ) ; the copper slowly disappeared ; in the blue -
green liquid thus formed he placed a piece of iron ; the iron disappeared , and ...
A weighed quantity of finely divided copper is dissolved in moderately
concentrated warm sulphuric acid ; when solution is complete , the greenish blue
liquid is evaporated to dryness by steam ; the blue solid is kept at 100° until it is
The blue solid is now dissolved in water , some sulphuric acid is added , and an
electric current is passed through the liquid until it is perfectly colourless . Every
particle of the red solid which has formed on one of the platinum plates is washed
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