When blue copper sulphate is heated, a white solid is formed. This change occurs due to the loss of what?
Answer and explanation
Correct answer: Water of crystallisation
Blue copper sulphate crystals are hydrated copper sulphate, CuSO4·5H2O, which contain water of crystallisation. On heating, this bound water is removed and anhydrous copper sulphate, CuSO4, is formed; it is white. Therefore, option A is correct. No chlorine, hydrogen or sodium is released because none of those species is part of copper sulphate crystals.
Frequently asked questions
What is the correct answer to this question?
Water of crystallisation
Why is this the correct answer?
Blue copper sulphate crystals are hydrated copper sulphate, CuSO4·5H2O, which contain water of crystallisation. On heating, this bound water is removed and anhydrous copper sulphate, CuSO4, is formed; it is white. Therefore, option A is correct. No chlorine, hydrogen or sodium is released because none of those species is part of copper sulphate crystals.
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.
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