Methane, CH₄, is a hydrocarbon - Edexcel - GCSE Chemistry - Question 3 - 2017 - Paper 1
Question 3
Methane, CH₄, is a hydrocarbon.
Chlorodifluoromethane can be formed from methane.
A diagram of one molecule of this compound is
Cl
|
C
... show full transcript
Worked Solution & Example Answer:Methane, CH₄, is a hydrocarbon - Edexcel - GCSE Chemistry - Question 3 - 2017 - Paper 1
Step 1
Explain whether or not this molecule is a hydrocarbon.
96%
114 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
This molecule is not a hydrocarbon. A hydrocarbon is defined as a compound that contains only carbon and hydrogen atoms. Since chlorodifluoromethane contains chlorine (Cl) in addition to carbon and hydrogen, it does not meet the criteria for being a hydrocarbon.
Step 2
State what this shows about the structure of this compound.
99%
104 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The fact that there is no decolorization of the orange bromine water indicates that chlorodifluoromethane is not an unsaturated compound. This suggests that it does not contain double or triple bonds, which would usually react with bromine.
Step 3
Complete the balanced equation for this reaction.
96%
101 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The balanced equation is:
2CHClF2→C2F4+2HCl
Step 4
State the type of reaction that occurred when tetrafluoroethene gas formed the solid.
98%
120 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The type of reaction that occurred is a polymerization reaction. Tetrafluoroethene can undergo polymerization to form polytetrafluoroethylene.
Step 5
Deduce the name of the solid formed.
97%
117 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The name of the solid formed is polytetrafluoroethylene (PTFE), which is commonly known as Teflon.
