OSMOTIC COEFFICIENTS OF PHYSIOLOGICAL SOLUTES

n: number of particles that dissociated from the solute molecule.
M.W.: Molecular Weight.
f: osmotic coefficient of the solute

Each solution listed contains only one type of solute and the solute concentration is the same as what is found in the extracellular fluids of mammals - the temperature of all the solutions is 37oC.

Solute

n

M.W.

f

NaCl

2

58.5

0.93

KCl

2

74.6

0.92

HCl

2

36.6

0.95

NH4Cl

2

53.5

0.92

NaHCO3

2

84.0

0.96

NaNO3

2

85.0

0.90

KSCN

2

97.2

0.91

KH2PO4

2

136.0

0.87

CaCl2

3

111.0

0.86

MgCl2

3

95.2

0.89

Na2SO4

3

142.0

0.74

K2SO4

3

174.0

0.74

MgSO4

2

120.0

0.58

Glucose

1

180.0

1.01

Sucrose

1

342.0

1.02

Maltose

1

342.0

1.01

Lactose

1

342.0

1.01