Originally posted by UltimaOnline:
Pb2+ fits the data... almost : the colour is a bit off. PbCl2 and PbBr2 are white, while PbI2 is bright yellow. Addition of aqueous sodium iodide would fit the data better, but since you said "The identity of B is PbCl2. How do I obtain that answer?", I replied accordingly.
Al3+ and Zn2+ ions also form insoluble hydroxides that dissolve in excess OH-. However, their chlorides are rather soluble.
Haha.. then i think there is a lot of info missing in this question then! Since supposing I didn't reveal the answer, it cannot be solved..
Many thanks ^^
one question to consult:
Which compound, when added to aqueus iron(II) sulphate, takes part in a redox reaction.
a) ammonia
b) barium chloride
c)acidified potassium dichromate(VI)
d)sodium hydroxide
Mind explaining each of the choices?