Solubility Lab and Rules! :D

A couple weeks ago we did yet another lab, yay! In this specific lab, the materials included different solutions containing either cations or anions. We then combined the different solutions to determine solubility. I put my observations in a chart. It's a little messy but here it is;

From the results, we were able to conclude solubility rules about the anions and cations.

Anions: 

• NO3 is ALWAYS soluble
• Cl is ALWAYS soluble (except for Pb and Ag)
• Po4 is usually solube (except for alkaline metals)
• SO4 is always soluble (except for Pb)

Cations:

• All alkali metals are soluble (Na, K, NH4)
• Silver is insoluble (except bonds with Sulfate and Nitrate)
• Lead is insoluble (except bonds with Nitrate)
• Ammonium is ALWAYS soluble