1. Colors of common substances in junior middle school chemistry (1): solid color 1, red solid: copper and iron oxide 2, green solid: basic copper carbonate 3, blue solid: copper hydroxide and copper sulfate crystal 4, purple-black solid: potassium permanganate 5, light yellow solid: sulfur 6, and colorless solid: ice and copper sulfate 4. Copper oxide, manganese dioxide, ferroferric oxide, (carbon black, activated carbon) 9, reddish-brown solid: iron hydroxide 10, white solid: sodium chloride, sodium carbonate, sodium hydroxide, calcium hydroxide, calcium carbonate.