This table showing the names, molecular formulae and structures of the three alkenes is incomplete - Edexcel - GCSE Chemistry - Question 5 - 2016 - Paper 1
Question 5
This table showing the names, molecular formulae and structures of the three alkenes is incomplete.
Complete the table.
name of alkene
molecular formula
structur... show full transcript
Worked Solution & Example Answer:This table showing the names, molecular formulae and structures of the three alkenes is incomplete - Edexcel - GCSE Chemistry - Question 5 - 2016 - Paper 1
Step 1
Complete the table for propene
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
The name of alkene is propene, the molecular formula is C₃H₆, and the structure can be represented as:
H H
| |
H—C=C—C—H
| |
H H
Step 2
Complete the table for butene
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 name of alkene is butene, the molecular formula is C₄H₈, and the structure is:
H H H
| | |
H—C=C—C—H
| | |
H H H
Step 3
Describe what is seen when bromine water is added to a sample of a liquid alkene and the mixture is shaken.
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
When bromine water is added to a liquid alkene, the solution changes from orange/red to colourless. This indicates that the alkene has reacted with the bromine, confirming the presence of the double bond in the alkene.
