[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.

[thallium chick]

doesnt mg mean miligram?

like maybe 20percent of a miligram??? im not a big fan of the metric system

[Mitch]

doesnt mg mean miligram?

like maybe 20percent of a miligram??? im not a big fan of the metric system

I would trust Awk

[jdurg]

mg% = mg/dL.  Trust me on this one.  I work with lab data all the time, so I constantly see this abbreviation used.  

[AWK]

Yes, mg means miligrams

100 grams and 1 dL for diluted water solution (eg physiological fluids) are apparently the same,
so Jdurg is also right (in fact for liquids a volume is used, but for solids - always mass).

Frankly saing, Light asked for calcium chloride solution, so Jdurg is slightly more right than me.

Mitch,  thank you to my fan.
.