3.4 reacting Quantities Flashcards

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1
Q

Define

stoichiometry

A

The stoichiometry represents the ratios the chemicals react in. This can be used to do
calculations. (stoichiometric ratio = multipliers in front of compounds).

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2
Q

Formula for

pecentage yeild

A

actual yeild/theoretical x100

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3
Q

Why is percentage yeild not 100%

A
  • incomplete reaction
  • other side reactions might of taken place
  • purification process can result in loosing some product
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4
Q

Define

Limiting reactant

A

the reactant that is not in excess will be completley used up first and stop the reaction

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5
Q

percentage yeild and atom economy comparision

A

atom economy: we take into acount multipliers
percentage yeild: you need experimental values

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6
Q

Formula for

atom economy

A

sum of mr of desired products/sum of mr of all products x100

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7
Q

comment on sustainability in light of

atom economy

A

atom economy can be 100%

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8
Q

Efficiency depends on both atom econmoy and % yeild

A

a particular reaction may have a high atom economy but poor percentage yeild

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