# Do acids without hydrogen taste sour?

I have heard that acids taste sour because of hydrogen (I don't really know exactly). According to the definition of acids:

An acid (from the Latin acidus/acēre meaning sour) is a chemical substance whose aqueous solutions are characterized by a sour taste, the ability to turn blue litmus red, and the ability to react with bases and certain metals (like calcium) to form salts

Some acids may not contain hydrogen. Would they also taste sour?

• Could you provide an example of acid, which does not contain hydrogen and you would like to put it in your mouth? – ssavec Oct 20 '13 at 14:43
• This has to do with molecules interacting with taste receptors, so could it possibly be a question more appropriate for Biology.SE? – Nicolau Saker Neto Oct 20 '13 at 15:03

• @Caters are you referring to cases such as $\ce{P4O10}$ or $\ce{CO2}$? If so, those compounds react with water to create the corresponding hydrogen-containing and hydrogen-releasing acids $\ce{H3PO4}$ and $\ce{H2CO3}$ respectively. – Jan Sep 28 '15 at 12:35