Ammonia production by the Haber process
How can nitrogen from the air be converted into ammonia quickly, efficiently and economically?
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CHEMISTRY · 9 EXPLORATION STEPS
Iron and its compounds: changes in oxidation state
The element is still iron, so why does it sometimes have oxidation state +2 and sometimes +3 in a test tube? How can you tell?
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▶ Open 3D simulationYOUR EXPLORATION
One step, one new insight.
- 01
Explore the experiment
- 02
White precipitate
- 03
Exclude air
- 04
Test with KSCN
- 05
Lower the oxidation state
- 06
Raise the oxidation state
- 07
Look inside
- 08
Test for iron
- 09
Assessment: return to +2
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Factors affecting reaction rate
Why do some reactions finish in seconds while others take a long time? What determines how fast a reaction proceeds?
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Molecular models of organic compounds
Molecular formulae are drawn on flat paper, but what are the actual three-dimensional shapes? What can a ball-and-stick model reveal?
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