An element is trivalent write the formula of its chloride, oxide, and sulphide
Answers
Explanation:
Thus, the formula of sulphide of element E is ES2. (It should be noted that the element E having a valency of 4 is like carbon, C. So, the chloride ECl4 is like carbon tetrachloride, CCl4, and the sulphide, ES2 is like carbon disulphide, CS2).
We are given that the element is trivalent.
The valency of the element = 3
Let us assume the symbol of the element as X
Chloride ion has the symbol Cl⁻, it is a negative ion with valency 1
Oxide ion has the symbol O²⁻, it is a negative ion with valency 2
Sulphide ion has the symbol S²⁻, it is a negative ion with valency 2
Since the element combines with these negative ions, it can be assumed that it will have a positive charge.
The symbol of the element will be X³⁺, as the valency of the element is 3
For the general formula of the compound = (Symbol of cation)(Valency of anion) (Symbol of anion)(Valency of cation)
Formation of element chloride:
Valency of element = 3
Valency of chlorine = 1
Using the formula, ACl₃
Formation of element oxide:
Valency of element = 3
Valency of oxide = 2
Using the formula, A₂O₃
Formation of element sulphide:
Valency of element = 3
Valency of sulphide = 2
Using the formula, A₂S₃
Therefore, the formula of the chloride is ACl₃, oxide is A₂O₃ and the sulphide is A₂S₃.