Subject: When rubber and sulfuric acid are mixed...

We performed a lab in class in which we allowed 4.5 molar sulfuric acid and 
various types of rubber (eraser, glove, elastic band, etc.) to react for four 
days. However, when we weighed the rinsed and dried pieces of rubber, we found 
that the mass of just about all samples had increased, and they were completely 
dry. My lab partener and I were hoping you could help, as we have no idea.

Re: When rubber and sulfuric acid are mixed...