Chapter 9 1 9 7 9 8 9 5 13 Deriving conversion factors from within the problem A conversion factor may be deduced from information in a word problem Facor is valid for ONLY that problem Dosing Dose per mass Drug delivered per time o 500mg pen 6h 2 millagrams with tablet that is to 50 micro grams how much o Convert micro into milli o 005 2 o 4 tablets Write out what youre given and what you need to know make plan Write out conversion factors Set up and problem solve Percent conversions Percent factor o Parts whole Uses the same units for the parts and whole Can be written as two factors 793 8 635 04 A solution has a solute and a solvent The concentration of a solution is the amount of solute dissolved in a specific amount of solution Concentration amount of solute amount of solution Weight volume percent o Solute Weight Solution Voluyme mL Volume volume percent o Volume Volume o Parts per million billion o Solute parts Solution 10 6 Mass percent m m or w w concentration Percent by mass of solute in a solution and is calculated using the formula Calculating Mass Percent The calculation of mass percent requires grams of solute and grams of solution Volume of percent Volume of solute solution Mass by volume percent The mass volume percent m v or w v o Mass volume o Mass of solute solution G of soltte 100 mL of solution 9M M 15 KCI 15g of Kcl 100 g of solution M V 5 glucose V v 12 5g of glucose 100mL 12 ml of ethanol 100mL solution Parts by million Mass of solure solution X 10 6 Mg per Kg Parts per billion Mass of solute solution X 10 9 Micro gram per kilogram