copper sulphate

British  

noun

1. a copper salt found naturally as chalcanthite and made by the action of sulphuric acid on copper oxide. It usually exists as blue crystals of the pentahydrate that form a white anhydrous powder when heated: used as a mordant, in electroplating, and in plant sprays. Formula: CuSO 4

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Example Sentences

Today when industrial-scale food adulteration occurs, such as the 85,000 tonnes of olives treated with copper sulphate that Italian police seized in February, we expect a systemic response.

From The Guardian • Apr. 18, 2016

In particular, he and his team are working on alternative treatments for common vine mildews; the conventional one, copper sulphate, accumulates in soil in doses that are toxic to wildlife.

From Nature • Dec. 19, 2012

Putting a crystal of copper sulphate in solution so that it grows is not life.

From Nature • Oct. 12, 2011

After that, he brushed the two tablets with fine graphite, suspended them in a copper sulphate solution with pieces of pure copper and made master plates by electrolysis.

From Time Magazine Archive

Free hydrogen and copper sulphate produce sulphuric acid and free copper.

From Electric Bells and All About Them A Practical Book for Practical Men by Bottone, S. R.