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Chemistry
Unit 3: Chemistry in Society
KA 3: Fertilisers
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Cards (15)
What is the purpose of fertilisers?
To increase
food crop
yields
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What three elements are essential in fertilisers?
Nitrogen
,
Phosphorus
, and
Potassium
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How do fertilisers benefit soil?
They restore
essential
elements for growth
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What is ammonia's state and smell?
Colourless
gas with a
pungent
smell
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What happens when ammonia is dissolved in water?
It forms an
alkaline
solution
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What does ammonia produce when reacted with acids?
Soluble
ammonium
salt and water
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Who created the Haber Process?
Fritz Haber
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What is the role of the iron catalyst in the Haber Process?
To speed up the
reaction
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What happens if the temperature is too low in the Haber Process?
The process is not
economical
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What happens if the temperature is too high in the Haber Process?
The backward reaction becomes
dominant
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What is a significant aspect of Fritz Haber's legacy?
He is known as the father of
chemical warfare
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What is the Ostwald Process used for?
To create
Nitric Acid
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What are the reactants in the Ostwald Process?
Ammonia
, water, and oxygen
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What catalyst is used in the Ostwald Process?
Platinum
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What are the key points about fertilisers and their production?
Fertilisers restore
essential
soil
elements
Key elements:
Nitrogen
,
Phosphorus
,
Potassium
Ammonia
and Nitric acid produce
nitrogen salts
Ammonia is a
colourless
gas with a pungent smell
Ammonia forms an
alkaline
solution in water
Ammonia
reacts
with acids to form ammonium salts
Haber Process
creates ammonia using an
iron catalyst
Ostwald Process
creates nitric acid using ammonia, water, and oxygen with
platinum catalyst
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