QA Flashcards
Possible white solid
- compounds of group 1 and 2 metals
- Zn2+/NH4+ compounds
Colourless solution
solutions of salts of group 1 and 2 metals, Zn2+/NH4+ salts, dilute acids/alkalis, hydrogen peroxide solution
Blue solid/solution
(Solution of) Hydrated Cu2+ salts
Green solid
Fe2+ salts(pale green), CuCO3
Green solution
Solution of Fe2+ salts(pale green)
Yellow solid
Fe3+ salts, AgI(pale yellow), PbI2(bright yellow), ZnO(hot)
Yellow solution
Dilute solution of Fe3+ salts
Brown/Red-brown solid
Fe2O3, Fe(OH)3, Cu(can be pink)
Brown solution
Concentrated solution of Fe3+ salts, i2(aqueous iodine)
Purple solid/solution
KMnO4
Grey solids
Metals except Cu and Au
Black solids
CuO, MnO2, I2(s), carbon powder
Solubility of (SO4)2- salts
All soluble except Ba, Ca, Pb, Ag(sparingly soluble)
Solubility of chloride salts
Soluble except Ag and Pb(except in hot water)
Solubility of carbonate salts
Insoluble except carbonates of group 1 metals and ammonium
Solubility of hydroxides and oxides
All insoluble except group 1 metals, Ba and Ca(slightly)
Test for hydrogen
Colourless, odourless gas evolved extinguishes lighted splint with ‘pop’ sound
Test for oxygen
Colourless, odourless gas relights a glowing splint