CI-Nitrogen chemistry Flashcards

1
Q

What kind of bond does N2 have? How does this affect its properties?

A

Triple covalent
unreactive

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2
Q

2 types of compounds nitrogen is incorporated into in order to be useful

A

Fertilisers-plant growth
NH3-Haber process

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3
Q

Shape of NH3

A

Pyrimidal, 107 degrees

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4
Q

Shape and bond angle of NH4+

A

Tetrahedral, 109.5

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5
Q

name and appearance of N20

A

Dinitrogen (I) oxide, colourless gas

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6
Q

Where does N2O come from

A

Bacteria in soil

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7
Q

Name and appearance of NO

A

Nitrogen (II) oxide, colourless gas

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8
Q

Where does NO come from

A

car exhausts-> high T+ P in engine, N and O from air
Lightning

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9
Q

Name and appearance of NO2-

A

Nitrogen (IV) oxide, brown gas (toxic)

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10
Q

Where does NO2 come from?

A

Oxidation of NO in air

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11
Q

Name the two nitrate ions
NO3-
NO2-

A

Nitrate (v)
Nitrate(III)

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12
Q

Shape of
NO3-
NO2-

A

NO3-= trigonal planar
3 bonding sets of electrons
NO2-= non linear
2 bonding pairs, 1 lone pair

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13
Q

How to test for NO3- ions

A

Add NaOH
Add Devarda’s alloy
warm gently
test gases with damp red litmus paper
Positive result- gas evolved turns damp red litmus paper blue (NH3 formed)

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14
Q

How to test for NH4+ ions

A

Add NaOH
NH4+ +OH–> NH3+H2O
Warm gently
Test gas with damp red litmus paper
Positive result- gas evolved turns damp red litmus paper blue (NH3 formed)

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