Formulas (exam 3)

Question 1

Smallest quantity (mg)

Answer 1

(100% sensitivity requirement) / (acceptable error (%)) = smallest quantity (mg)

Question 2

Aliquot method steps

Answer 2

MWQ = 100% x SR / %
1. MF= mwq/given (Drug)
2. Drug = MF + given drug
3. Total= drug x MF
4. Diluent = total - drug
5. Take= drug/ total = given/x (proportion)

Question 3

Percent error

Answer 3

Error x 100% / quantity desired

Question 4

Density

Answer 4

Density = mass/volume

Question 5

Specific gravity

Answer 5

Weight of given substance/ weight of equal volume in water

Question 6

Volume by weight & SG

Answer 6

ML = grams/sg

Question 7

Percent weight in volume

Answer 7

Volume (mL) x % (decimal) = weight (g)

Question 8

Mosteller formula

Answer 8

Body surface area m^2 = square root height (cm) x weight (kg) / 3600

Question 9

Potency proportion

Answer 9

Units (given) / weight or volume (given) = units (given or desired) / weight or volume (given or desired)

Question 10

Molecule to meq weight

Answer 10

Mg/meq = mw / valence

Question 11

Ideal BW

Answer 11

Males: 50kg + 2.3kg (inches > 5ft)
Females: 45.5 + 2.3kg (inches > 5ft)

Question 12

Adjusted body weight

Answer 12

(Actual body weight - IBW) x 0.4 + IBW