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Unformatted text preview: Equivalent weight
Formula Weight Eq Wt = # equivalents/mole
Determining the number of equivalents in a
mole requires that you know the type of
reaction and how the species involved actually
In other words - you already know R If the normality of your titrant and the equivalent
weight of your analyte is known, your
calculations are simpler.
NAVA = NBVB = equivalentsB
%B = mlA NA eq wtB 100
mg sample Realistically, you still need to know R so you can
use either type of calculations. Parts per million and parts per billion
These are extensions of the % system which
are used for very dilute solutions
ppm = ppb = wt solute
wt solution wt solute
wt solution x 106 x 109 ...
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