Quote:
Originally posted by Shazaam! ... Here’s a simple test. Draw a small amount of battery acid and put the particles in it. Battery acid is dilute sulfuric acid, so when you add chromium to it you’ll get a release of hydrogen bubbles and the chromium will turn the darker violet color of chromium sulfate. Aluminum doesn’t react. For you chemistry majors: 2Cr + 3H2SO4 > Cr2 [SO4]3 + 3H2 |
A further test to confirm this - using a match, apply a small flame to the gas that's given off. If H2 (Hydrogen gas) is being produced, you'll hear a "pop" (and the walls and roof of your garage will disappear).
NB. Do not really try this!