**PHARMACEUTICAL CALCULATION | BANK OF QUESTIONS PST LEVEL 4**

What is the meaning of International Unit?

What is Imperial Unit?

What is Metric System?

What is Household unit of measure?

What is a density?

What is a specific gravity?

What is the formula for calculating the volume
of specified liquid when you have specific gravity and its weight?

What is the formula for calculating the weight
of specified liquid when you have specific gravity and its volume?

What is the percentage of zinc oxide in an
ointment prepared by mixing 200 g of 10% ointment, 50 g of 20% ointment, and
100 g of 5% ointment?

A hospital pharmacist wants to use three lots
of zinc ointment containing respectively, 50%, 20% and 5% of zinc ointment. In
what proportion should they be mixed to prepare a 10% zinc oxide?

What is dilution of liquid?

What is concentration of liquid?

What is the
volume of potassium permanganate 10%w/v needed to prepare 2000 mL of 1%w/v
solution of potassium permanganate?

What volume of
dextrose 5% w/v solution will be prepared from 500 mL of dextrose 25%w/v
solution?

What are the
common diluents used for diluting powders for injection?

The label
amoxicillin oral suspension calls for the additional of water into a bottle
(100 mL) with a 30 mL of a dry powder such that when mixed with water will
produce a 250 mg / 5mL amoxicillin oral suspension.

How many
milliliters of water were added?

How many
milligram of amoxicillin are in the suspension?

Answers:

The following is
the answer for the above question:

Volume
of the dry amoxicillin powder is 30 mL

Then
volume of water needed will be determined as follows

Total
volume (100 mL) – volume of dry powder (30mL) = 70 mL **Answer**

Amount
ofamoxicillin in the suspension:

Each
5 mL contains 250 mg of amoxicillin

100
mL will contain X mg of amoxicillin.

X
mg = (100 mL×250 mg )/5 mL

X
mg = 5000 mg of amoxicillin powder

What
are different methods used in the determination of child dose?

What
are the reasons for calculating child dose?

What
are the two important factors to consider when determining doses for elderly
patients

What
is Heparin?

How
do you calculate the dose of Heparin?

What is the
meaning of percentage weight-in-volume?

What do you
understand by the term sodium chloride 0.9%w/v (normal saline)?

What is the meaning
of percentage volume-in-volume?

What do you
understand by the term sodium chloride 0.5%v/v chloroform solution?

What is the
meaning of mg%w/v?

What do you
understand by 400mg%w/v dextrose
solution?

What do you
understand by the following : percentage strength w/w, %w/v, %v/v, ratio
strength and parts per million.

What
do you understand by the term “reducing and enlarging of formula?”

Write
the formula for calculating factor

What
do you understand by dilution in a reduced or enlarged formula?

What is dilution of solids and semisolids?

What is concentration if solids and
semisolids?

How many grams of 20% benzocaine ointment and how many grams of ointment base (diluent) should be used in preparing 5 lb. of 2.5% benzocaine ointment?

What is aliquot?

What are the steps of weighing by aliquot
method?

What are the steps of measuring volume by
aliquot method?

What is a
pharmaceutical calculations?

What is the
importance of pharmaceutical calculations?

What is
Arabic numerals?

What is Roman
numerals?

What are the units of measure of volume?

What are instruments that are used to measure
volume?

Convert the following into mL : 0.5L, 1L,
2.5L, 5L and 250ÂµL

What are the units of measure of weight?

Convert the following units of measure of
weight into milligram; 250g, 0.003kg, 7.4 g, 10g , 188000Âµg and 100g

What is the unit of measure of length?

Convert the following units of measure of
length into meter: 100mm, 360cm, 80km,
123500Âµm, 0.045hm and 250 dm

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