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PH102 LAB > DENSITY AND SPECIFIC GRAVITY > Flashcards

DENSITY AND SPECIFIC GRAVITY Flashcards

1
Q

Mass per unit volume of a substance

A

Density

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2
Q

What is density expressed as

A

Grams per cubic centimeter

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3
Q

What is the density of water?

A

1g/cc

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4
Q

Formula of density

A

Density = Mass/Volume

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5
Q

Is a ratio, expressed decimally, of the weight of a substance to the weight of an equal volume of a subtance

A

Specific Gravity

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6
Q

The weight of a substance relative to the weight of a standard

A

Relative Value

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7
Q

Formula for Specific Gravity

A

Specific Gravity = Weight of substance/Weight of Equal Volume of Water

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8
Q

What substances are lighter than water?

A

A specific gravity of less than 1

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9
Q

What substances are heavier than water?

A

Specific gravity is greater than 1

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10
Q

Concrete number

A

Density

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11
Q

Units of measure varies

A

Density

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12
Q

Maybe expressed as

A

1g/mL, 1000g/L, 62.5 lb/cu ft

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13
Q

Abstract number

A

Specific Gravity

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14
Q

No unit

A

Specific gravity

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15
Q

Glass bottle to determine specific gravity

A

Pycnometer

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16
Q

What is the formula for calculating the weight if the volume and specific gravity is given

A

Grams = mL x specific gravity

17
Q

What id the formula for calculating the volume if the weight and specific gravity is given

A

mL = Grams/Specific Gravity

18
Q

Convert the weight of an ingredient or preparation to volume or vice versa

A

Pharmaceutical Applications of Specific Gravity

19
Q

Calculate the equivalent strength of a preparation on the basis of either weight or volume

A

Pharmaceutical Applications of Specific Gravity

20
Q

Preparation of total parenteral nutrition (TPN) admixtures

A

Pharmaceutical Applications of Specific Gravity

21
Q

Specific gravity is an important factor for urinalysis

A

Clinical Application

22
Q

What are the percentage strengths?

A

% w/v
% v/v
% w/w

23
Q

Ratio Strength

A

5% into 1/20 or 1:20
1:20 into 5%

24
Q

How to convert product percentage strength mg/ml?

A

Multiply the % strength expressed as a whole number by 10

Example: 4% x 10 = 40mg/mL

25
Q

Expresses the number of mg of substance in 100 mL of liquid

A

Milligrams percent

26
Q

It is used to occasionally to denote the concentration of a drug or natural substance in a biologic fluid, as in the blood.

A

Milligrams Percent

27
Q

How are strengths pf very dilute solutions are commonly expressed?

A

Ppm or ppb

28
Q

What are the methods to reduce or enlarge formulas

A

Ratio and Proportion
Dimensional Analysis
Factor Method: Simplest Method

PH102 LAB (13 decks)

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