What is meant by water of crystallisation?
Answer and explanation
Correct answer: A fixed amount of water in salt crystals
Water of crystallisation is the definite number of water molecules chemically associated with one formula unit of certain salt crystals. For example, copper sulphate crystals contain five water molecules, written as CuSO₄·5H₂O. It is not simply river water, any water mixed with acid, or a gas from a base. Thus, option A gives the correct definition.
Frequently asked questions
What is the correct answer to this question?
A fixed amount of water in salt crystals
Why is this the correct answer?
Water of crystallisation is the definite number of water molecules chemically associated with one formula unit of certain salt crystals. For example, copper sulphate crystals contain five water molecules, written as CuSO₄·5H₂O. It is not simply river water, any water mixed with acid, or a gas from a base. Thus, option A gives the correct definition.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Chemical Substances – Nature and Behaviour. Topic: Acids, Bases, and Salts.
