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Mohamd Kambl
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Cards (20)
What is the term used to describe the amount of product obtained from a chemical reaction?
Yield
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How can yield be measured in chemistry?
In
grams
or
moles
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What does the term 'actual yield' refer to?
The amount of product actually obtained from a
reaction
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What does 'theoretical yield' represent?
The yield expected based on
calculations
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If 2 grams of hydrogen reacts with 16 grams of oxygen, what is the theoretical yield of water?
18 grams
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Why might the actual yield be less than the theoretical yield?
There are several reasons, including incomplete reactions,
side reactions
, and
product loss
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What is one reason why a reaction might not go to completion?
The
reactants
might not fully react
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What is a reversible reaction?
A reaction where products can revert back to
reactants
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In
the nitrogen and hydrogen reaction to make ammonia, why might we not get the expected amount of ammonia?
Some ammonia might break back down into nitrogen and hydrogen
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What are side reactions in a chemical reaction?
Reactions where
reactants
produce different products than expected
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If nitrogen reacts with oxygen instead of hydrogen, what product is formed?
Nitrogen dioxide
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What is one way product loss can occur during a reaction?
Gaseous
products
can escape into the air
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What happens when filtering a solution?
Some liquid or
solid
may be left behind
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How do you calculate the percentage yield?
Divide the
actual yield
by the
theoretical yield
and multiply by 100
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If the actual yield is 15 grams and the theoretical yield is 18 grams, what is the percentage yield?
83.3%
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What does a percentage yield of 100% indicate?
All
predicted products
were obtained
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What is the theoretical yield of the reaction between 2 grams of hydrogen and 16 grams of oxygen?
18 grams
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What does a percentage yield of 0% indicate?
No product was obtained
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What are the common reasons for a lower actual yield in chemical reactions?
Reactants may not fully react
Side reactions producing unexpected products
Loss of product during the process
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How do you find the percentage yield from a chemical reaction?
Take the actual yield
Divide by the theoretical yield
Multiply by 100
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