Using the solubility rules, predict the solubility of each of the following compounds in water: (S= Soluble, I= Insoluble)


a)CaCO©ý _______

b) Al(OH)©ý ______
c) Hg©üCl©ü _______

d) Pb(NO©ý)©ü _______

To predict the solubility of compounds in water using solubility rules, we need to refer to a set of guidelines that outline which compounds are soluble and which are insoluble. Here are the solubility rules for the compounds you provided:

a) CaCO₃: Calcium carbonate is generally considered insoluble in water. However, there are exceptions for compounds that contain the group 1A cations or the ammonium ion (NH₄⁺). Since Ca²⁺ is not in either of these groups, the solubility of CaCO₃ is predicted to be insoluble (I) in water.

b) Al(OH)₃: Aluminum hydroxide is also insoluble in water. Hydroxides of group 1A cations and ammonium are usually soluble, but aluminum hydroxide, being an exception, is insoluble (I) in water.

c) HgCl₂: Mercury (II) chloride is soluble. Chlorides are generally soluble except when paired with silver (Ag⁺), lead (Pb²⁺), or mercury (I) (Hg₂²⁺). Since Hg²⁺ is not in any of these groups, the solubility of HgCl₂ is predicted to be soluble (S) in water.

d) Pb(NO₃)₂: Lead (II) nitrate is soluble. Nitrates are almost always soluble in water. Therefore, the solubility of Pb(NO₃)₂ is predicted to be soluble (S) in water.

Remember, these predictions are based on general solubility rules, but there can be exceptions. It is always a good idea to verify with experimental data or other references if available.