Solubility Rules

Question 1

soluble or insoluble:
Li+, Na+, K+, Rb+, Cs+ (group 1A cations)

Answer 1

soluble

Question 2

soluble or insoluble:
NH4+ (ammonium ion)

Answer 2

soluble

Question 3

soluble or insoluble:
Cl-, Br-, I-

Answer 3

mainly soluble

Question 4

common exceptions for:
Cl-, Br-, I-

Answer 4

Ag+, Hg2(2+), Pb(2+)

Question 5

soluble or insoluble:
NO3- (nitrate)

Answer 5

soluble

Question 6

soluble or insoluble:
ClO4- (perchlorate)

Answer 6

soluble

Question 7

soluble or insoluble:
CH3CO2 (acetate)

Answer 7

soluble

Question 8

soluble or insoluble:
SO4(2-) (sulfate)

Answer 8

mainly soluble

Question 9

common exceptions for:
SO4(2-) sulfate

Answer 9

Sr(2+), Ba(2+), Hg2(2+), Pb(2+)

Question 10

soluble or insoluble:
CO3(2-) carbonate

Answer 10

mainly insoluble

Question 11

common exceptions for:
CO3(2-) carbonate

Answer 11

group 1A cations & NH4+

Question 12

soluble or insoluble:
S2- sulfide

Answer 12

mainly insoluble

Question 13

common exceptions for:
S2- sulfide

Answer 13

group 1A cations, NH4+, Ca2+, Sr2+, Ba2+

Question 14

soluble or insoluble:
PO4(3-) phosphate

Answer 14

mainly insoluble

Question 15

common exceptions for:
PO4(3-) phosphate

Answer 15

group 1A cations, NH4+

Question 16

soluble or insoluble:
OH- (hydroxide)

Answer 16

mainly insoluble

Question 17

common exceptions for:
OH- (hydroxide)

Answer 17

group 1A cations, NH4+, Ca2+, Sr2+, and Ba2+