Module 1

Question 1

What are the divisions of the apothecary system of measurement (solid weight)?

Answer 1

1 Troy (apothecary) pound = 12 ounces

1 ounce = 8 drams

1 dram = 3 scruples

1 scruple = 20 grains

Question 2

What are some fluid measurements in the apothecary system?

Answer 2

1 gallon = 4 quarts

1 quarts = 2 pints

1 pints = 16 fluid ounces

1 fluid ounce = 8 fluidrams

1 fluidram = 60 minims

Question 3

Do units with the same name in the Avoirdupois and Apothecary measurement systems have the same weight?

Answer 3

No, but the common measure between the two systems is the grain

1oz (Avoirdupois) = 437.5 grains (gr)

1 ounce (Apothecary) = 480 grains (gr)

Question 4

What are the measurements in the Avoirdupois system of measurement (solid weight)?

Answer 4

1 avoirdupois pound = 16 avoirdupois ounces

1 avoirdupois ounce = 437.5 grains

Question 5

If an ounce is denoted with “oz.”, what measurement system should be assumed?

Answer 5

Avoirdupois system

Question 6

What are conversions of household measurements into metric?

Answer 6

1 tsp = 5mL

3 tsp = 1 tbsp

1 tbsp = 15mL

Question 7

What are the boiling, freezing, and body temperatures of water in the Fahrenheit system?

Answer 7

Boiling point: 212*F

Freezing point: 32*F

Normal Body Temperature: 98.6*F

Question 8

What are some conversions between the Apothecary system to Metric?

Answer 8

Weight:
1 apothecary pound = 373.2 g

1 apothecary ounce = 31.1 g

1 grain = 65 mg

1g = 15.432 grains (gr)

Volume:
1 gallon = 4545 mL

1 pint = 473 mL

1 fluid ounce = 29.57 mL

1 minim = 0.06 mL

Question 9

What are some conversions between the Avoirdupois and Metric systems of measurement?

Answer 9

1 avoirdupois pound = 454 g

1 kg = 2.2 lbs

1 avoirdupois ounce = 28.35 g

Question 10

What are some important conversion rates between imperial and metric systems of measurement?

Answer 10

1 inch = 2.54 cm

1 ft = 12 inches

Question 11

What are some approximate metric conversions from the avoirdupois and apothecary systems of measurement?

Answer 11

1 dram = 1tsp = 5mL

1 apothecary ounce = 30 g

1 avoirdupois ounce = 30 g

1 fluid ounces (apoth.) = 2 tbsps = 6 tsps = 30mL

Question 12

Study the different symbols for the units found in the apothecary and avoirdupois systems

Question 13

What are the sig fig rules for weighing and measuring?

Answer 13

The final answer should be as precise as the equipment you have

Question 14

What are the rules for sig figs for % concentrations?

Answer 14

w/w & w/v : 2 decimal places

ppm: whole number

Question 15

What are the sig fig rules for mEq & mmol?

Answer 15

1 decimal place

Question 16

What are the sig fig rules for drops?

Answer 16

Whole number

Question 17

What are the sig fig rules for temperature?

Answer 17

1 decimal place

Question 18

What are the sig fig rules for body weight?

Answer 18

For small infants (grams, leave as whole number)

For children or adults, express pounds as a whole number and kilograms to 1 decimal place

Question 19

What are the sig figs for doses measured in grams?

Answer 19

2 decimal places

Question 20

What are the sig fig rules for milligrams and micrograms?

Answer 20

Leave as whole number

Question 21

What is the sensitivity requirement (SR) of a Class A Torsion Balance?

Answer 21

6mg

Question 22

What is the smallest quantity weighable (SQW) on a given scale?

Answer 22

SQW= (100%xsensitivity requirement (SR))/(acceptable percentage of error (%))

Question 23

What is linearity in terms of electronic balances?

Answer 23

It is analogous to sensitivity requirement (SR) in non-electronic balances.

Linearity values can be inserted into the SQW equation in place of SR

Question 24

What is the utility of the aliquot method of measuring smaller quantities of drugs?

Answer 24

It allows pharmacists to accurately dispense quantities of drug compound lower than the smallest quantity weighable for a given balance.

The aliquot employs dilution to accomplish this task