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Chemistry > Fertilisers > Flashcards

Fertilisers Flashcards

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1
Q

Ammonia

A

NH3

Only alkaline gas

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2
Q

Haber process

A

Process used to make ammonia

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3
Q

Haber process equation

A

N2 + 3H2 = 2NH3

Nitrogen and hydrogen are combined to make ammonia

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4
Q

Reaction chamber

A 
Moderate temperature (400 degrees c)
High pressure (200 atm)
Iron catalyst
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5
Q

How is the haber process made more economical

A

Unreacted nitrogen and hydrogen are put back into the reaction chamber

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6
Q

Ammonium reactions

A

Ammonium compound + alkali = ammonia

Ammonia + water = alkaline solution

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7
Q

Ostwald process

A

Ammonia from haber process is used to make nitric acid

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8
Q

Conditions for Ostwald process

A

A platinum catalyst is used
Temperature 600-900 degrees c
Slight pressure is used

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9
Q

Fertilisers

A

Must contain one of the elements nitrogen
Phosphorus and potassium
Must be soluble in water to be absorbed by plants roots

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Chemistry (8 decks)

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