CI-Nitrogen chemistry Flashcards
What kind of bond does N2 have? How does this affect its properties?
Triple covalent
unreactive
2 types of compounds nitrogen is incorporated into in order to be useful
Fertilisers-plant growth
NH3-Haber process
Shape of NH3
Pyrimidal, 107 degrees
Shape and bond angle of NH4+
Tetrahedral, 109.5
name and appearance of N20
Dinitrogen (I) oxide, colourless gas
Where does N2O come from
Bacteria in soil
Name and appearance of NO
Nitrogen (II) oxide, colourless gas
Where does NO come from
car exhausts-> high T+ P in engine, N and O from air
Lightning
Name and appearance of NO2-
Nitrogen (IV) oxide, brown gas (toxic)
Where does NO2 come from?
Oxidation of NO in air
Name the two nitrate ions
NO3-
NO2-
Nitrate (v)
Nitrate(III)
Shape of
NO3-
NO2-
NO3-= trigonal planar
3 bonding sets of electrons
NO2-= non linear
2 bonding pairs, 1 lone pair
How to test for NO3- ions
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)
How to test for NH4+ ions
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)