Question

The chemical formulae of oxide of an element 'x' is x2o5.write the chemical formula of its chloride

Answer 1

Xcl5 is the chloride

Valency of x is 5 and chlorine is 1 criss cross it

Answer 2

The chemical formula of its chloride is $XCl_5$

Explanation:

For formation of a neutral ionic compound, the charges on cation and anion must be balanced. The cation is formed by loss of electrons by metals and anions are formed by gain of electrons by non metals.  

In $X_2O_5$, X is having an oxidation state of +5 and oxide anion with oxidation state of -1. They combine and their oxidation states are exchanged and written in simplest whole number ratios to give neutral $X_2O_5$

For formation of chloride,  X with oxidation state of +5 will combine with chloride anion with oxidation state of -1. Their oxidation states are exchanged and written in simplest whole number ratios to give neutral $XCl_5$

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