units/ calculations
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10 Terms
what is molar solution (M)
the concentration of one mole per 1 litre
what does %w/v mean
weight of a solid in grams of a 100ml of liquid ( 1g in 100ml )
what does %w/w mean
weight in grams of a solid in 100g of a solid ( sometimes a liquid ) ( 1g in 100 g)
what does %v/v mean
volume of a liquid in 100ml of liquid ( 1ml in 100ml )
what does a calculation of total amount mean
it gives the total amount or weight of a drug ( in grams or moles ) in a volume of solution or multiple dosage forms
what doe ratio concentration express
they express the number of parts ( in ml ) of a solvent which one part of a drug is dissolved or dispersed in
e.g. 1:5000 = 1g of drug in 5l of solution
in a dilution what happens to the weight of the active ingredient
it stays the same throughout
what is the equation used for dilution of liquids and solids
how long is a pharmaceutical month
28 days