for example, can anyone tell me whether metal (3) ions (AlCl3) actually hydrolyse when only added to water? in the chapter on inorganic ions it says that it doesn't:
AlCl3 + excess H2O ---> (Al(H2O)6)3+ +3Cl
but in the chapter on periodicity, it says that it does, but only slightly! not to the neutral ppt!!:
AlCl3 ---> Al3+ + 3Cl-
then just that the hydrated Al3+ ion is only partly hydrolysed!!
(Al(H20)6)3+ ---> (Al(H2O)5 OH) +H