Rochelle salt

American  

noun

Chemistry, Pharmacology.

1. a colorless or white, water-soluble solid, KNaC 4 H 4 O 6 ⋅4H 2 O, used in silvering mirrors, in the manufacture of Seidlitz powders and baking powder, and in medicine as a laxative.

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Rochelle salt British  

noun

1. a white crystalline double salt, sodium potassium tartrate, used in Seidlitz powder. Formula: KNaC 4 H 4 O 6 .4H 2 O

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Etymology

Origin of Rochelle salt

First recorded in 1745–55; after La Rochelle

Example Sentences

See Examples For:

Rochelle salt

In another vessel dissolve pure Rochelle salt to the amount of 2.6 w, and make up the solution to the volume v.

From On Laboratory Arts by Threlfall, Richard

Then combine 1 part of the alkaline Rochelle salt solution, 1 part of copper sulphate, and 4 parts of water.

From School and Home Cooking by Greer, Carlotta Cherryholmes

When these substances are dissolved in water and mixed, effervescence occurs, carbon dioxide escapes, and a solution of Rochelle salt remains. 212a.

From General Science by Clark, Bertha M.

This acid, united to the mineral alkali, makes Rochelle salt.

From Heads of Lectures on a Course of Experimental Philosophy: Particularly Including Chemistry by Priestley, Joseph

Now, you know the shelf bottles of tartar emetic and Rochelle salt Ant. et Pot.

From Strictly business: more stories of the four million by Henry, O.