Post by: bucket on April 12, 2008, 03:36:30 pm
After doing several chemical analysis questions I've seen that some questions ask for different percentages.
I've found myself getting stuck on many of these questions because I don't know/don't remember as easily what is exactly being asked.
The only one I can remember without fail, are
can anyone explain what some of the other ones are asking for?
Some that I've seen are
I think there might be others...
Post by: Mao on April 12, 2008, 03:54:58 pm
% m/v : mass per volume: 1% m/v is 1g/100mL
% w/v : weight per volume, exactly as % m/v
ppm: parts per million: it can be used as m/v, 1 ppm = 1 microgram per mL, or 1 milligram per L (1 in a million)
mass/volume concentrations are based on the assumption that the density of the solution is 1g/mL
Volume/Volume:
% v/v : volume per volume: 1% v/v is 1mL/100mL
Mass/Mass:
ppm: parts per million: it can be used as m/v where it is an aqueous solution, as the average density is 1g/mL, 1ppm = 1 microgram per gram, or 1 milligram per kilogram
% m/m: mass per mass: 1% m/m = 1 gram/100 grams
% w/w: weight per weight, same as mass per mass
Mole/litre:
M: mole per litre. 1M = 1 mole/litre
EDIT: added stuff and fixed a couple things
Post by: bucket on April 12, 2008, 03:58:40 pm
*prints*
Post by: Mao on April 12, 2008, 04:11:30 pm
its all formatted, so :P