Quantative Chemistry Topic 4 Unit 2 Flashcards

1
Q

What is the definition of concentration?

A

The concentration of a solution is a measure of how much of a substance is dissolved in a known amount of water

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2
Q

Concentration in g/dm3 =…..

A

Mass of solute (g) / volume (dm3)

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3
Q

What is the concentration in g/dm3 of 30g of Nacl dissolved in 3dm3 of solution

A

Concentration in g/dm3 = mass of solute (g) / volume (dm3)
30/3
10g/dm3

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4
Q

1 litre = …

A

1dm3

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5
Q

C in the formula c = n/v

A

Concentration

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6
Q

N in formula c = n/v

A

No. of moles

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7
Q

V in formula c = n/v

A

Volume

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8
Q

1dm3 = ……

A

1000cm3

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9
Q

What formula do you use to change from one unit to another?

A

Concentration in g/dm3 = concentration in moles / dm3 X RFM

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10
Q

Definition of titration

A

A method of reacting 2 solutions together to determine the number of moles of the solute in one of the solutions

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11
Q

How do you prepare a burette

A

Rinse with deionised water
Rinse with solution
Fill with solution
Allow solution to run out until bottom of meniscus is on the zero line
Ensure the tip is full and there are no air bubbles

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12
Q

How do you prepare a pipette

A

Rinse with deionised water
Using a pipetter filler: rinse with solution, fill with solution
Holding the pipette vertically with the volume line at eye level, run out the solution until the bottom of the meniscus is on the line

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13
Q

Colour of phenolphalein in acid

A

Colourless

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14
Q

Colour of methyl orange in acid

A

Red

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15
Q

Colour of methyl orange in alkali

A

Yellow

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16
Q

Colour of phenophtalein in alkali

A

Pink