a)Name two cations whose salts are quite soluble in water?

b)Name one anion whose salts are soluble in water.?

Refer to this table.

http://www.files.chem.vt.edu/RVGS/ACT/notes/solubility_rules.html

I would choose Na and NH4 for the cations and nitrate for the anion.

a) To identify cations whose salts are soluble in water, we need to refer to a solubility chart or table. This chart provides information on the solubility of various compounds in water.

Here are two common cations whose salts are typically soluble in water:
1) Sodium cation (Na+): Salts such as sodium chloride (NaCl), sodium nitrate (NaNO3), and sodium sulfate (Na2SO4) are highly soluble in water.
2) Potassium cation (K+): Salts like potassium chloride (KCl), potassium nitrate (KNO3), and potassium sulfate (K2SO4) show good solubility in water.

b) Similarly, to identify an anion whose salts are soluble in water, we need to consult a solubility chart.

One common anion whose salts are usually soluble in water is the chloride anion (Cl-). Salts such as sodium chloride (NaCl), potassium chloride (KCl), and calcium chloride (CaCl2) readily dissolve in water.