General Solubility Rules (2-5)

Question 1

Rule 2

Answer 1

All chlorides (Cl-), bromides (Br-), iodides (I-), are soluble except Ag+, Hg2^2+, and Pb^2+
All fluorides (F-) are soluble except Group 2 and Pb^2+

Question 2

Rule 3

Answer 2

Most sulfates (SO4^2-) are soluble except Sr^2+, Ba^2+, Ca^2+, Ag+, Hg2^2+, and Pb^2+

Question 3

Rule 4

Answer 3

All carbonates (CO3^2-), phosphates (PO4^3-), chromates (CrO4^2-), oxalates (C2O4^2-), and oxides (O^2-) are insoluble except Group 1 and NH4+

Question 4

Rule 5

Answer 4

All hydroxides (OH-) are insoluble except Group 1, Sr^2+, and Ba^2+ (Ca^2+ is slightly soluble).

Question 5

What are the exceptions to rule 2?

Answer 5

Cl-, Br-, I- : Ag+, HG2^2+, and Pb^2+
F- : Group 2 and Pb^2+

Question 6

What are the exceptions to rule 3?

Answer 6

SO4^2- : Sr^2+, Ba^2+, Ca^2+, Ag+, Hg2^2+, and Pb^2+

Question 7

What are the exceptions to rule 4?

Answer 7

CO3^2-, PO4^3-, CrO4^2-, C2O4^2-, O^2- : Group 1 and NH4+

Question 8

What are the exceptions to rule 5?

Answer 8

OH- : Group 1, Sr^2+, and Ba^2+ (Ca^2+ is slightly soluble)

Question 9

All ___ and ___ are soluble

Answer 9

nitrates, acetates

Question 10

All sulfides are insoluble except…

Answer 10

Group 1, Sr^2+, Ba^2+
Ca^2+ is slightly soluble

Question 11

Most compounds containing ___, __, and ___ are soluble

Answer 11

potassium, sodium, ammonium