IGCSE Chemistry

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Thursday, March 21, 2019

4.19 know the general formula for alkanes

General formula for alkanes:

C_nH_2n+2

at March 21, 2019

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Syllabus Points

Organic Chemistry: 4.1 know that a hydrocarbon is a compound of hydrogen and carbon only 4.2 understand how to represent organic m...

4.17 describe how long-chain alkanes are converted to alkenes and shorter-chain alkanes by catalytic cracking (using silica or alumina as the catalyst and a temperature in the range of 600–700ºC)

- In cracking, a large alkane is cracked to produce smaller, more useful molecules. longer chained alkane --> shorter chained alkane + ...
Syllabus Points

Organic Chemistry: 4.1 know that a hydrocarbon is a compound of hydrogen and carbon only 4.2 understand how to represent organic m...
4.6 understand how to classify reactions of organic compounds as substitution, addition and combustion

Substitution: reaction where one atom is swapped with another atom. (only happens in ALKANES) e.g. when ethane reacts with bromine gas, one...

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