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27 Cards in this Set
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What is w/w?

Weight in weight
used when the final product is a solid (powder oint etc) and the component you are measuring the % is also a solid. Units in the numerator and denominator must be the same. (ie lb/lb) 
What is v/v?

Volume in volume.
is used when the final product is a liquid (solution) and the component you are measuring the % of is also a liquid. Units in the numerator and denominator must be the same (ie ml/ml) 
How many liters of a 1:20 dextrose solution contain 100g of dextrose?

100g 1g
______ = _____ ? 20ml ?=100g x 20/1 2000ml or 2 liters 
How many ml of ethanol are in 35ml of a 1:2 v/v ethanol solution?

1ml ethanol ?
___________ = ________ 2ml solution 35ml solu 1mlx35/2 ?=17.5ml ethanol 
1 ounce = _____ grains
1 pound = _____ grains 
437.5 grains
7000 grains 
Using the alligation method,
calculate how many parts of 5% and 20% ointments you will need to make a 10% final product. 
20% (10%)= 5 parts of 20%
5%(subtracted from 10%)= 10 parts of 5% 
If a label on a vial reads "add 9.2ml of diluent to the vial to get 10ml of a 100mg/ml solution for injection." How many ml of the reconstiututed solution would provide a 250mg dose?

100mg x
_____ = _____ x=1000mg/vial 1ml 10ml 1000mg 250gm ______ = ______ 10ml x x=2.5ml 
what is the celsius to fahrenheit temp conversion formula?

9(ºC)=5(ºF)160
converting degrees C to degrees F ºF = 32 + 5/9 Converting degrees F to degrees C ºC = 5/9 (ºF32) 
How much water would you add to 100ml of a 15% kcl solution to get a 5% final product?

(100ml)(15%) = (X)(5%)
(100ml)(15%) ____________ = x (5%) x=300ml total 100ml 15% 200ml of H2O 
if an I.V. order is for 500ml of D5 NS to be given over 4 hours (240 min) & the I.V. set delivers 15 drops per ml, what would the flow rate be?

15gtts x
______ = ______ x=7500 gtts 1ml 500ml 7500 x _____ = _____ x= 31gtts/min 240min 1min 
1 scruple = ____ grains
1 dram = ___ scruples 1 ounces = _____ drams 
1 scruple = 20 grains
3 scruples = 1 dram 8 drams = 1 ounce 
1 teaspoon = ____ml
1 Tablespoonful = ____ml 
5
15 
convert 39ºF to celcius

9(ºC) = 5(39)  160
9(ºC) = 195160 9(ºC) = 35 ºC=35/9 ºC=3.9 
1 gram = ______ grains
1 grain = ____ mg 1 pound = _______gms 1 kg = _______pounds 
1 gm = 15.4 grains
1 grain = 65 mg 1 pound = 454 gms 1kg = 2.2 pounds 
Check the validity of the DEA number AP1857397

It has 2 letter and 7 digits
Sum of 1,3,5 digits = 9 (sum1) sum of 2,4,6 digits = 24 24 X 2 = 48 (sum 2) 48+9 = 57 (sum3) the 7th digit is a 7 The number is valid. 
Convert 80º C to ºF.

9(80)=5(ºF)160
5(ºF)=720+160 5(ºF)= 880/5 ºF = 176 
How many liters of a 5% dextrose solution contain 100g of dextrose?

5g 100g
___ = _____ 100g x 100ml/5gm 100ml ? 2000ml 
what is the ratio strength (w/v) of a solution with 2 g of drug in 50ml of solution?

1g 2g
___ = ___ ? 50ml 1g x 50/2 25ml ratio is 1:25 
How many grams of dextrose are in 50ml of a 5% w/v solution?

5g = ?
____ ____ 5gx50ml/100ml 100ml 50ml 2.5 gms 
How many grams of lidocaine are in 75 g of a 1:50 w/w ointment?

1g lido ?
________ = ________ 50gm oint 75g oint ?=1gx75/50 ?=1.5g lidocaine 
How many ml of ethanol are in 35ml of a 70% v/v ethanol solution?

70ml ethanol ?
____________ = _______ 100ml solution 35ml sol 70 x 35/100 24.5ml of ethanol 
How many grams of lidocaine are in 75g of a 2% w/w ointment?

2g lido ?
_______ = ________ 100g oint 75g oint 2 x 75/100 1.5 g of lidocaine 
What is w/v?

Weight in volume is used when the final product is a liquid as indicated by the v in the denominator and the component your are measuring the % of is a solid as indicated by the w in the numerator. The numerator is always in grams and the denominator is always in ml.
EX: 17g of drug K in 100ml of a final solution would be 17g/100ml=0.17or 17%w/v 
How many gms of a 1:100 hct crm contain 0.5g of hct?

1 g hct 0.5g hct
_______ = _________ 100g cr ? ?=100gx0.5/1 ?=50gm of cream 
How much nacl is in 200ml of a 1:111 solution?

1g ?
_____ = ______ 111ml 200ml ?=1gm x 200/111 ?= 1.8gm 
1 fluid ounce = _____ ml
1 pt = ______ml 1 gal = ______ ml 
30ml
473ml 3785ml 
What is the formula for checking the validity of a DEA number?

DEA # should contain 2 letters & 7 #.
Add digits 1,3 & 5 to get sum 1 Add digits 2,4 & 6 & multiply x2 this is sum 2. Add sum 1 & 2 this is sum 3. In a valid DEA #, the 7th digit will be the 2nd digit of sum 3. If not, the DEA # is not valid. 