SC6i - CALCULATIONS 2 Flashcards

1
Q

actual yield definition

A

amount of product actually made

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2
Q

expected yield definition

A

amount of product expected to be made

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3
Q

percentage yield formula

A

percentage yield = actual yield / expected yield x 100

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4
Q

actual yield is always less than expected yield because (3 reasons)

A
  1. some product is ‘left behind’ on the equipment eg. filter paper
  2. the reaction may not be complete or may be reversible
  3. there may be unwanted side reactions
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5
Q

atom economy definition

A

a measure of how efficient or sustainable a chemical reaction is

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6
Q

atom economy formula

A

atom economy (%) = mass of useful product / total mass of products x 100

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7
Q

concentration definition

A

amount of solute (in g or moles) per dm3 or solvent

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8
Q

concentration equation

A

concentration (g/dm3) = mass of solute (g) / volume of solution (dm3)
OR
concentration (mol/dm3) = moles of solute (mol) / volume of solution (dm3)

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9
Q

moles equation including concentration and volume

A

moles (mol) = concentration (mol/dm3) x volume (dm3)

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10
Q

equation for converting concentration in g/dm3 to mol/dm3

A

concentration in mol/dm3 = concentration in g/dm3 / RFM

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11
Q

at room temperature and pressure (RTP), 1 mole of any gas occupies __dm3

A

24dm3

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12
Q

mole equation for gases

A

moles = volume (dm3) / 24

moles = volume (dm3) / 24,000

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13
Q

moles equation including mass and RFM

A

moles (mol) = mass (g) / RFM (g/mol)

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