What is another word for Rochelle Salt?
Pronunciation: [ɹˈɒt͡ʃɛl sˈɒlt] (IPA) 
Rochelle salt, also known as potassium sodium tartrate, is a compound commonly used in electrochemistry and piezoelectric devices. It is a byproduct of the wine industry and is made by crystallizing cream of tartar from grape wine. The salt is colorless and has a sweet taste. As a chemical compound, it can be compared to other similar substances, such as sodium potassium tartrate or sodium tartrate. In electronics, it is sometimes replaced by sodium chloride or sodium sulfate. In medicine, it's sometimes substituted by magnesium sulfate, and in food, it can be substituted with cream of tartar, sodium citrate or citric acid.
