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solutions Flashcards

(18 cards)

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1
Q

what is a solution

A

a homogeneous mixture of two or more substances

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2
Q

what is a solute

A

the substance dissolved in a solution

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3
Q

what is a solution

A

a substance, usually liquid which is capable of dissolving one or more substances

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4
Q

what is volume concentration expressed as

A

% v/v (volume per volume)
used when both are liquids

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5
Q

what is weight concentration expressed as

A

% w/w (weight per weight)

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6
Q

what does % w/v stand for

A

weight per volume

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7
Q

when is %w/v used

A

when a solid chemical is dissolved in a liquid

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8
Q

what is the equation for %w/v

A

mass of solute (g)
____________________ x100
volume of solution (ml)

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9
Q

what is the equation for %w/w

A

mass of solute (g)
____________________ x100
mass of solution (g)

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10
Q

what is the equation for %v/v

A

volume of solute
____________________ x100
volume of solution (ml)

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11
Q

what is normal saline

A

A sterile solution of sodium chloride (NaCl) dissolved in purified water

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12
Q

what is a percentage solution

A

the amount of solute dissolved in a given volume of solvent, this is expressed as a percentage of the solutes mass in relation to the total mass of the solution

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13
Q

what is referred to as a normal solution

A

a solution of known concentration

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14
Q

what is a buffer solution

A

a solution that can resist change in its PH when an acid or base is added to it

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15
Q

what is a molar solution

A

one that contains 1 mole of a solution in 1L of solvent

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16
Q

what does serial dilution do

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A

creates a series of solutions with decreasing concentrations from a stock solutions

17
Q

whats the equation for dilution factor

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A

initial volume
______________ = dilution factor
final volume

18
Q

how is serial dilution done

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A

the solution is diluted repeatedly by a fixed factor

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