Solubility Rules

Question 1

Soluble (NAGSAG)

Answer 1

• Nitrates
• Acetates
• Group 1
• Sulphates
• Ammonium
• Group 7

Aqueous

Question 2

Insoluble (CHOPS)

Answer 2

• Carbonates
• Hydroxides
• Oxides
• Phosphates
• Sulphides

Solid

Question 3

Nitrates

NO3-

Answer 3

Soluble, no exceptions

Question 4

Acetates

C2H3O2-

Answer 4

Soluble, no exceptions

Question 5

Group 1 salts

Na, Li, K, etc.

Answer 5

Soluble, few rare exceptions

Question 6

Sulphates

(SO4)2-

Answer 6

Soluble, except with
- Barium (Ba2+)
- Lead (Pb2+)
- Calcium (Ca2+)
- Strontium (Sr2+)

Exceptions: BAd LEAky CALculator STRuggles

Question 7

Ammonium

NH4+

Answer 7

Soluble, few rare exceptions

Question 8

Group 7

Cl, Br, I

Answer 8

Soluble, except with:
- Lead (Pb+)
- Silver ( Ag+)
- Mercury I (Hg2)2+

Exceptions: LEADing SILVERy MERmaids

Question 9

PbCl2

Answer 9

Slightly soluble in cold water, moderately soluble in hot water

Question 10

Carbonates

(CO3)2-

Answer 10

Insoluble, except with:
- Group 1
- Ammonium (NH+)

Question 11

Hydroxides

Answer 11

Insoluble, except with:
- Group 1
- Barium (Ba2+)
- Strontium (Sr2+)

Exceptions: Group 1 BARking STorks

Question 12

Phosphates

(PO4)3-

Answer 12

Insoluble, except with:
- Group 1
- Ammonium

Question 13

Oxides

Answer 13

Insoluble, except with:
- Sodium (Na+)
- Potassium (K+)
- Barium (Ba2+)
- Ammonium (NH4+)

Exceptions: SODden POTtery BARs AMity

Question 14

Sulphides

S2-

Answer 14

Insoluble, except with:
- Group 1
- Group 2
- Ammonium

Question 15

Insoluble except with Group 1 and Ammonium

Answer 15

• Carbonates
• Phosphates
• Sulphides (also with group 2)