1.

a) Why do ionic compounds have high melting points ? b) Write the equation for the reaction of i) Iron with steam ii) Calcium and potassium with water.

Answer»

Solution :In the formation of ionic compounds, positive ions and negative ions PRECIPITATE. These are closely packed and the ionic compounds exist as crystalline solids. They have strong inter - ionic process of ATTRACTION and have high metling and BOILING POINTS.
i) `3Fe + 4H_(2)O to FC_(2)O_(4)+H_(2)`
ii) `Ca+2H_(2)O toCa(OH)_(2)+ H_(2)`
`2K + 2H_(2)O to 2KOH+H_(2)`


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