Substitute For Cream of Tartar I recently bought tartar sauce instead of cream of tartar as my recipe said. The thing is I can't decide if tartar sauce is the same thing as cream of tartar. 

Please advise whether I can use this as a substitute or if there are other substitutes or a recipe for cream of tartar.
Cream of Tartar is potassium bitartrate in the form of powder. It is acidic, and is used in cooking mainly to stabilise meringue.

Tartare sauce is a mayonnaise-based sauce made using cornichons, capers, and tarragon or dill. It is usually served with seafood.

The two items are completely different and cannot be substituted one for the other.