inorganic chemistry. salts in test tubes: manganese sulfate, copper sulfate, nickel chloride, zinc sufate and iron oxide.

analysis analytical black blue chemical chemistry chloride color colorful copper crystal design different education equipment experiment experimental exploration formula green group hydrate industrial industry inside iron oxide label laboratory loose macro mineral powder reagent research salt sample school science scientific set structure substance sulfate technology test tubes tube weight white work inorganic salts manganese nickel zinc sufate colored reagents metals