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Pharm Chem PL1001 > Solutions and Dilutions > Flashcards

Solutions and Dilutions Flashcards

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1
Q

What does API stand for?

A

Active Pharmaceutical Ingredient

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2
Q

What is an excipient?

A

Any other component of medicines that isn’t API

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3
Q

What is Route of Administration?

A

The path medicines take into the body

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4
Q

What is a solution?

A

A solution is a homogeneous mixture of 2 or more substances in a single phase

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5
Q

What is a solvent?

A

Solvent is the component present in larger quantities in a solution

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6
Q

What is a solute?

A

A solute is the component present in smaller quantities in a solution

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7
Q

What is solubility?

A

Maximum of quantity of solute which can dissolve in a given solvent quantity

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8
Q

What is meant by saturated solution?

A

A solution is saturated when no more solute can dissolve and there is excess. Particles switch in and out of the saturated solution

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9
Q

How is solubility expressed?

A

Solubility is expressed in terms of concentration

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10
Q

What is a mole fraction?

A

Mole fraction is the number of moles of solute over the total number of moles in a mixture

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11
Q

What is the equation for mole fraction?

A

n(solute) / n(solute) + n(solvent)

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12
Q

What is molarity?

A

The number of moles of solute dissolved in 1L of solution

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13
Q

What are the units of molarity?

A

molL^-1

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14
Q

What is a molar solution?

A

1 molL^-1

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15
Q

What is %w/v

A

The number of grams of solute in 100ml of solution

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16
Q

What is %w/w

A

The number of grams of solute in 100g of solution

17
Q

What is density?

A

Ratio of an object’s mass to its volume

18
Q

What is the equation for density?

A

Density = mass/volume

19
Q

What are the standard units of density?

A

gcm^-3

20
Q

What is 0°C in K?

A

0°C = 273K

21
Q

What is a qualitative observation?

A

A change in colour or physical appearance

22
Q

What is 0°C in °F?

A

0°C = 32°F

23
Q

What can lead to variations in molarity?

A

Temperature changes can affect solution density and therefore molarity

Pharm Chem PL1001 (2 decks)

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