Question

an ionic compound contains three elements a b and C if oxidation state of A = + 2. B =+ 5 and C= - 2 the possible molecular formula of that ionic compound is​

Answer 1

The possible molecular formula of that ionic compound is

is:

A(BC3)2 and A3B2C8 .

• The formula of the compound with elements A,B,C will be in the form AxByCz. (x,y and z are atomicities of individual atoms respectively).
• As given , oxidation state is

A= +2 , B= +5 , C = -2

• A compound is always neutral ,so the oxidation number of the compound is zero .So , the net oxidation state of the individual atom is zero.

=> +2x+5y+(-2)z = 0

2x+5y-2z = 0

• The maximum state oxidation state could be +8 or -3 .So, by hit and trial method the value of x ,y and z can be 1,2,6 or 3,2,8.
• Both can be possible for the unknown compound .

so , the answer is A(BC3)2 and A3B2C8 .