Volume and Temperature are directly proportional to each other. (Take a balloon outside in the cold, it will shrink)

V=kT

If temperature and moles of gas are constant, the amount of pressure and volume are inversly proportional:

Increase in pressure=decrease in volume

P= k

     —

     V

Solubility Rules

(for ionic compounds in water)

1. All common compounds of group 1A ions (Li⁺, Na⁺, K⁺, etc.) and ammonium ion (NH₄⁺) are soluble.

2. All common nitrates (NO₃^-), acetates (CH₃COO^- or C₂H₃O₂^-) and most perchlorates (ClO₄^-) are soluble.

3. All common chlorides (Cl^-), bromides (Br^-) and iodides (I^-) are solulble except those of Ag⁺, Pb²⁺, Cu⁺, and Hg₂²⁺

4. All common sulfates (SO₄^2-) are soluble, except those of Ca²⁺, Sr²⁺, Ba²⁺, and Pb²⁺

1. All common metal hydroxides are insoluble, except those of Group 1A and the larger members of Group 2A (beginning with Ca²⁺)

2. All common carbonates (CO₃²⁺) and phosphates (PO₄^3-) are insoluble except those of Group 1A and NH₄⁺.

3. All common sulfides and insoluble except those of Group 1A, Group 2A and NH₄⁺.

                  mass%= mass of solute

                               mass of solution

1. Formation of Precipitate

2. Formation of gas

3. Formation of water (acid-base RXN)

4. Formation of soluble weak electrolyte.