Testing for Gases

• When anhydrous copper sulfate is mixed with water, it will absorb the water and change in appearance, becoming a blue crystalline
•  Place a lighted splint in a test tube containing the gas. If the gas is hydrogen, there will be a squeaky pop
• The glowing splint test is when you place the glowing splint into the unknown gas. In carbon dioxide, the splint goes out completely. In oxygen, the splint reignites.
•  If carbon dioxide is bubbled through limewater, the limewater turns milky or cloudy white.