What is complex compound what is double salt in short

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Complex compound


1- These retain their identity in solid as well as in solution State. 

2- The Constituent simple salts may not be in the equimolar proportions.

3- These may have ionic as well as covalent bonds.

4- These salts don't gives the test of all the ions of their Constituents in the solution.

5- potassium ferrocyanide K4 [Fe (CN) 6] is a complex compound .

Double salt 

1- These retain their identity in solid but lose their identity in solution .

2- The Constituent simple salt in it are in equimolar properties.

3- These contain ionic bonds.

4- These are characterised by the complete dissociation in solution State and therefore give the test of all the ion present in them .

5- Alum is a double salt .
                   K2 SO4 Al2 (SO4) 24H2O

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