Solubility Rules

Question 1

Salts of Na+, K+, NH4+

Answer 1

Always soluble

Question 2

Nitrates (NO3)-

Answer 2

Always soluble

Question 3

Chlorates (ClO3-)

Answer 3

Always soluble

Question 4

Perchlorates (ClO4-)

Answer 4

Always soluble

Question 5

Chlorides (Cl-)

Answer 5

Mostly soluble.
Insoluble: Ag+, Hg2 2+, Pb 2+

Question 6

Bromides (Br-)

Answer 6

Mostly soluble.
Insoluble: Ag+, Hg2 2+, Pb 2+

Question 7

Iodides (I-)

Answer 7

Mostly soluble.
Insoluble: Ag+, Hg2 2+, Pb 2+

Question 8

Fluorides (F-)

Answer 8

Mostly soluble
Insoluble: Mg 2+, Ca 2+, Sr 2+, Ba 2+, Pb 2+

Question 9

Acetates (CH3COO-)

Answer 9

Mostly soluble
Insoluble: Ag+, Hg2 2+

Question 10

Sulfates (SO4 2-)

Answer 10

Mostly soluble
Insoluble: Ca 2+, Sr 2+, Ba 2+, Ag +, Pb 2+

Question 11

Sulfides (S 2-)

Answer 11

Mostly insoluble
Soluble: Li+, Na+, K+, Rb+, Cs+, NH4+, H+

Question 12

Sulfites (SO3 2-)

Answer 12

Mostly insoluble
Soluble: Li+, Na+, K+, Rb+, Cs+, NH4+, H+

Question 13

Carbonates (Co3 2-)

Answer 13

Mostly insoluble
Soluble: Li+, Na+, K+, Rb+, Cs+, NH4+, H+

Question 14

Chromates (CrO4 2-)

Answer 14

Mostly insoluble
Soluble: Li+, Na+, K+, Rb+, Cs+, NH4+, H+

Question 15

Oxalates (C2O4 2-)

Answer 15

Mostly insoluble
Soluble: Li+, Na+, K+, Rb+, Cs+, NH4+, H+

Question 16

Phosphates (PO4 3-)

Answer 16

Mostly insoluble
Soluble: Li+, Na+, K+, Rb+, Cs+, NH4+, H+

Question 17

Hydroxides (OH-)

Answer 17

Mostly insoluble
Soluble: Li+, Na+, K+, Rb+, Cs+, Ba 2+

Question 18

Oxides (O 2-)

Answer 18

Mostly insoluble
Soluble: Li+, Na+, K+, Rb+, Cs+