MARTYN F. CHILLMAID / SCIENCE PHOTO LIBRARY MARTYN F. CHILLMAID / SCIENCE PHOTO LIBRARY
Sodium hydroxide and transition metals. Test tubes containing sodium hydroxide solution reacting with various transition metal salts. From left to right: iron II sulphate, iron III sulphate, copper sulphate and nickel sulphate. The reaction produces a coloured precipitate of solid metal hydroxide in a colourless solution of sodium sulphate.
Model release not required. Property release not required.