*VOLUME PERCENT SOLUTIONS: Determined by the volume in milliliters of solute per 100 milliliters of solution ( milliliters solute + milliliters
solvent). Volume percent (v/v) = volume of solute in mL x 100 100 mL of solution Example: 20 mL of ethyl alcohol in 80 mL of water is a 20% by
volume solution. *MASS-VOLUME PERCENT
SOLUTIONS: Indicated by w/v%.
Determined by the mass in grams of solute per 100 milliliters of solution. Mass-volume percent (w/v%) = mass of solute in grams x 100 100 mL of solution Example: 1 gram of Phenolphthalein in 100 mL of 95% ethyl
alcohol is a 1 w/v% solution. Tom Jaszewski www.livesoil.com 702-595-7012 -----Original
Message----- Tom: How do you get 200 ml CaCl? How many grams of NaCl would you need to use to produce 200 ml
CaCl? if I want to make 2% baking soda solution, since baking soda is in
solid powder form, how many games of baking soda should I use in one litter of water? Regards -----Original Message----- Percent
by volume: Solutions based on
percent by volume are calculated the same as for percent by weight, except that
calculations are based on volume. Thus one would simply determine what
percentage was desired (for example, a 20% by volume aqueous solution of sodium
chloride) and the total quantity to be prepared. If
the total quantity needed is 1 liter, then it would simply be a matter of
calculating 20% of 1 liter which, of course is: 0.20
NaCl * 1000 ml/l = 200 ml NaCl/l. Tom Jaszewski www.livesoil.com 702-595-7012 -----Original
Message----- Tom: As I read through the article, How do you make a 2% backing
soda solution? What does this 2% mean? Regards -----Original Message----- ATTRA as usual provides some GREAT
informatiom.
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