Solubility Rules

Question 1

NO₃^-

Answer 1

Always Soluble

Question 2

C₂H₃O₂^-

(acetates)

Answer 2

Always Soluble

Question 3

Cl^-, Br^-, I^-

Answer 3

Always Soluble
EXCEPT Ag⁺, Pb⁺, Hg₂²⁺

Question 4

SO₄^2-

Answer 4

Always Soluble
EXCEPT
Ba²⁺, Pb²⁺, Ca²⁺, Sr²⁺

Question 5

CO₃^2-, PO₄^3-

Answer 5

Always Insoluble
EXCEPT
Na⁺, K⁺, NH₄⁺

Question 6

OH^-

Answer 6

Always Insoluble
EXCEPT
Na⁺, K⁺

Question 7

S^2-

Answer 7

Insoluble
EXCEPT
Na⁺, K⁺, NH₄⁺, Alkaline Earth Metals

Question 8

Na⁺, K⁺, NH₄⁺

Answer 8

Always soluble