Download Plant hormones

Plant hormones
Molarity
Molarity is often used to express
concentrations of plant hormones
especially in tissue culture.
It is a good way to compare
hormones because it is an
expression of active molecules in
the solution regardless of the
weight of the compound.
Back to main
biology menu
Next
A one molar solution (1 M) is the
molecular weight of the compound
in grams dissolved in a solvent to
measure one liter.
Researchers
commonly
use
molarity to express hormone
concentrations.
Growers need to be able to
convert molar to ppm as well as
ppm to molar.
Back to plant
hormome menu
Back to main
selection menu
Plant hormones
Molarity
Conversion of ppm to molar uses the following formula:
ppm = micromolar concentration x molecular weight
divided by 1000.
Conversion of ppm to molar is
calculated as:
ppm =
Convert 2000 M IBA to ppm. The
molecular weight of IBA is 203.
# M x molecular weight
Back to main
biology menu
ppm =
1000
Back
Next
2000 M x 203
1000
Back to plant
hormome menu
= 406 ppm
Back to main
selection menu
Plant hormones
Molarity
Conversion of molar to ppm uses the following formula:
Micromolar = (ppm x 1000) divided by molecular weight.
Conversion of molar to ppm is
calculated as:
M =
Convert 406 ppm IBA to molar. The
molecular weight of IBA is 203.
# ppm x 1000
Molecular weight
Back to main
biology menu
Back
M =
406 ppm x 1000
203
Back to plant
hormome menu
= 2000 M
Back to main
selection menu