a. All hydroxides and oxides are insoluble except All Gp 1 elements Sr2+, Ba2+, Ca2+ and ammonium (NH4+)
b. All sulphides are insoluble except for All Gp 1 elements Ca2+ and ammonium (NH4+)
2007-04-03 01:11:38 · 3 answers · asked by me t 1 in Science & Mathematics ➔ Chemistry
Solubility depends on a whole lot of factors, these are temperature, concentration of the solute in the solution. So it is not general that all hydroxides all insoluble. Plus the elements you mention as group 1 are actually 2. Sulphides are definately insoluble, and ammonium is just an ion, you would have to specify which compound it is that you talk about.
2007-04-03 01:18:38 · answer #1 · answered by Amanda P 2 · 0⤊ 0⤋
Ammonium oxide does not exist, which rules out a.
2007-04-03 08:17:36 · answer #2 · answered by Gervald F 7 · 0⤊ 0⤋
For your answer in (a), it's Gp 2 not 1, Sr, Ba and Ca all have valency +2, shown clearly by yourself. And all of them are soluble.
And neither b is the answer.
2007-04-03 08:16:47 · answer #3 · answered by brad 3 · 0⤊ 1⤋