1.

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

Answer»

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 melting and boiling points.

i) 3Fe + 4H2O → FC2O4 + H2

ii) Ca + 2H2O → Ca(OH)2 + H2

2K + 2H2O → 2KOH + H2



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