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20 mg%

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light:
Calcium chloride (MW 110.99)

20 mg%

hello,

can anyone tell me how to make a 20mg% solution of calcium chloride? what makes me confused is the unit mg%. what on earth does it mean?

thanks!

Mitch:
by weight?

light:
here is an example i found;

Dinitrophenol (DNP - MW 184.11)

18.4 mg% - Dissolve 18.4 mg of 2,4-dinitrophenol to a final volume of 100 mL with water or buffer.

but what exactly does mg% mean?

Demotivator:
It's a term I haven't heard before either, but I deduce that mg% = % by weight x 1000 (thus the term milli). In the DNP example, 18.4 mg = .0184 g.
(.0184g/100g total) x 100 = .0184% ..the actual percent.
.0184% x 1000 mg = 18.4 mg%

AWK:
mg% - this term is used often in pharmacy and means - number of mg of solute in 100 g of solution.

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