Question

What is the correct name for CaS04? (a) calcium sulfoxide (b) calcium sulfite (c) calcium sulfur oxide (d) calcium sulfate (e) calcium sulfide tetroxide

Answer 1

Answer: OPTION, D

Explanation:

It is an example for ionic salt and has Calcium ion and sulfate ion.

Hence it's name is Calcium sulfate.

Calcium sulfoxide does not exist.

Calcium sulfite has CaSO3.

Answer 2

Answer: The name of $CaSO_4$ is calcium sulfate.

Explanation:

An ionic compound is defined as the compound which is formed when electron gets transferred from one atom to another atom. These are usually formed when a metal reacts with a non-metal or a metal reacts with a polyatomic ion or a reaction between two polyatomic ions takes place.

$CaSO_4$ is an ionic compound because calcium element is a metal and sulfate ion is a polyatomic ion. The bond formed between a metal and a non-metal is always ionic in nature.

The nomenclature of ionic compounds is given by:

• Positive ion is written first.
• The negative ion is written next and a suffix is added at the end of the negative ion. The suffix written is '-ide'.
• In case of polyatomic ions, the name of the ion is written as such. For Example: $OH^-$ is named as hydroxide, $SO_4^{2-}$ is named as sulfate and so on..

Hence, the name of $CaSO_4$ is calcium sulfate.