Question

Be sure to answer all parts. Write the formula for the following ionic compounds: (a) potassium oxide (b) iron(III) sulfide (containing the Felt ion) (c) cobalt(I) sulfate (containing the Cotion and So, ion) O Type here to search

Answer 1

Step-by-step explanation:

(a) potassium oxide

Potassium is the element of group 1 and oxygen is the element of group 16. The most common valency of potassium and oxygen are 1 and 2 respectively.

So, the ionic compound formed:

K (Cation) O (Anion)

1 2

Interchange of the valency, So,

K₂O

(b) iron(III) sulfide

Iron is a d block element and sulfur is the element of group 16. The most common valency of sulfur is 2. The valency of iron is 3 which is written in roman in the name.

So, the ionic compound formed:

Fe (Cation) S (Anion)

3 2

Interchange of the valency, So,

Fe₂S₃

(c) cobalt(I) sulfate

Cobalt is a d block element. The valency of cobalt is 1 which is written in roman in the name. Sulfate is an anion which has formula of SO₄²⁻ .

So, the ionic compound formed:

Co (Cation) SO₄

1 2

Interchange of the valency, So,

Co₂SO₄