Final answer:
Compounds of Li+, Na+, K+, Rb+, Cs+, and NH4+ are usually soluble, but there are exceptions for certain Li+ salts. Acetates, nitrates, and perchlorates are soluble. Carbonates, phosphates, sulfides, oxides, and hydroxides are mostly insoluble, but there are exceptions for certain ions.
Step-by-step explanation:
When it comes to the solubility of compounds, there are some general guidelines to follow. Generally, compounds of Li+, Na+, K+, Rb+, Cs+, and NH4+ are soluble in water. However, there are exceptions for certain Li+ salts. Other soluble compounds include acetates (C2H3O2-), nitrates (NO3-), and perchlorates (ClO4-). Bromides, chlorides, and iodides are also soluble.
On the other hand, there are anions whose compounds are mostly insoluble. These include carbonates (CO3^2-), phosphates (PO4^3-), sulfides (S^2-), oxides (O^2-), and hydroxides (OH-). However, there are exceptions for sulfides formed with group 2 cations and hydroxides formed with calcium, strontium, and barium.
It's important to note that solubility is a matter of degree and there is a wide range of actual solubilities. These guidelines provide a general understanding, but there may be variations depending on specific compounds.