I press the BRB and change my avatar to a copper sulfate solution flask (my 4th flask)
List of past flasks
1. Hydrochloric Acid with universal indicator
2. Sodium hydroxide with phenolphthalein indicator
3. Ethanol with universal indicator
4. Copper sulfate solution with no indicator The optimist says the glass is half full. The pessimist says the glass is half empty. I say the glass is completely full: 50% water, 39% nitrogen, 10.5% oxygen, 0.45% argon and 0.015% carbon dioxide.