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View Full Document Solution Concentration
Solution Concentration
Read 281 – 283. Try questions 1 – 8 (show work)
Concentration = quantity of solute
quantity of
solution
(not solvent)
There are 3 basic ways to express concentration:
1) percentages, 2) very low concentrations,
and 3) molar concentrations
1) % concentration can be in V/V, W/W, or W/V
•
Like most %s, V/V and W/W need to have the
same units on top and bottom.
•
W/V is sort of in the same units; V is mostly
water and water’s density is 1 g/mL or 1 kg/L
3
g
H
2
O
2
/100
mL
solution
≈
3
g
H
2
O
2
/100
g
Solution Concentration
Solution Concentration
2) Expressing concentrations in parts per million
(ppm) requires the unit on top to be 1,000,000
times smaller than the unit on the bottom
E.g.
1 mg/kg or
μ
g/g
•
Multiples of 1000 are expressed in this order
μ
_, m_, _, k_
(“_” is the base unit)
(pg.631)
•
Notice that any units expressed as a volume
must be referring to a water solution (1L = 1kg)
•
For parts per billion (ppb), the top unit would
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This note was uploaded on 11/09/2011 for the course CHEM 110 taught by Professor Sullivan during the Fall '10 term at BYU.
 Fall '10
 Sullivan

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