copper sulphate
Definition
Noun: - A blue crystalline compound: Copper sulphate is an inorganic chemical compound with the formula CuSO₄. It is most commonly encountered as the pentahydrate, CuSO₄·5H₂O, which forms bright blue crystals. - A copper salt: It is produced by the reaction of sulfuric acid with copper or copper oxide.
Usage and Examples
- General Use: Copper sulphate is used as a fungicide, herbicide, and in various industrial processes.
- The farmer used copper sulphate to control algae in the pond.
- In the laboratory, we prepared a solution of copper sulphate for the electroplating experiment.
- Scientific/Technical Context: It serves as a source of copper ions in chemical reactions and is a common reagent.
- The formation of a deep blue color indicated the presence of copper sulphate in the test.
Advanced Usage
- "Copper sulphate pentahydrate": The specific, most common hydrated form of the compound (CuSO₄·5H₂O).
- The blue crystals you see are copper sulphate pentahydrate.
- "Anhydrous copper sulphate": The white, powdery form of the compound without water (CuSO₄), used as a desiccant.
- Anhydrous copper sulphate turns blue when it absorbs water from the air.
Variants and Related Words
- Copper sulfate: The American English spelling variant. The meaning is identical.
- Copper sulfate is listed as a common laboratory chemical.
- Cupric sulphate: An older, alternative name based on the "cupric" (Cu²⁺) ion.
- Cupric sulphate was historically used in dyeing processes.
Synonyms
- Blue vitriol: A common historical name for the pentahydrate form.
- Bluestone: Another common name, especially in agricultural and horticultural contexts.
Related Phrases and Compounds
- Copper sulphate solution: An aqueous mixture of the compound.
- The copper was purified using a copper sulphate solution.
- Copper sulphate test: A chemical test using the compound as a reagent.
- A positive copper sulphate test confirms the presence of reducing sugars.
Noun
-
a copper salt made by the action of sulfuric acid on copper oxide
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