Don't know what an acid is? It is anything with a PH lower than 7. Something that is basic is anything with a PH higher than 7. They can both burn you bad if they are basic or acidic enough. Examples of powder acid are boric acid, citric acid, sulfuric acid, etc..
Ohhhhh I didn't know you meant that kind of acid, I thought you meant an ecstasy pill that was really lsd XD
or we can let this shit thread die already....seriously, if you see this post please resist the urge to post again