Question

can anyone help me with salt solubility? I am supposed to decide what is and isn't soluble and I don't understand them. I really just need help with understanding the first two, hopefully I will be able to understand the others.
1. AgNO3
2. Ag2SO4
I looked them up and one is and two isn't. I don't understand why though. I couldn't find any reasoning behind them being so different.

Answer 1

Here are the general rules: http://www.csudh.edu/oliver/chemdata/solrules.htm

Answer 2

The first is soluble because any compound with nitrate is soluble.

Answer 3

The second is insoluble because, although most sulfates are soluble, silver sulfate is an exception.

Answer 4

Make sense?

Answer 5

Ok that does make sense I suppose my problem is that I am also to label the rule I used to identify it. I think that the only rules I to use are the one provided for my which are five;
1. Salts of group 1 and ammonia are soluble.
2. Acetates and nitrates are soluble.
3. Binary compounds of group 17, except F, are soluble with metals,
except Ag, Hg+, and Pb.
4. All sulfates are soluble, except those of Ba, Sr, Pb, Ca, Ag, and Hg+.
5. Except for those in rule 1, carbonates, hydroxides, oxides, sulfides, and phosphates are insoluble.

And I am having a hard time understanding the rules I guess because #4 says that Ag are insoluble which is in both problems.

Answer 6

Ok. #4 only says that sulfates with Ag are insoluble. #2 says that all nitrates are soluble :-)

Answer 7

Ok so if a problem has a characteristic that is considered soluble, that's dominating to non soluble characteristic?

Answer 8

Ag isn't generally insoluble. Just with sulfates and in binary compounds with group 17 elements.

Answer 9

Ok I think I get it! Thank you so much!

Answer 10

You're welcome :-)