Reaction 1 is an addition reaction - NSC Physical Sciences - Question 4 - 2023 - Paper 2
Question 4
Reaction 1 is an addition reaction.
Write down:
4.1.1 The TYPE of addition reaction
4.1.2 ONE observable change which occurs in the container during the reaction
4... show full transcript
Worked Solution & Example Answer:Reaction 1 is an addition reaction - NSC Physical Sciences - Question 4 - 2023 - Paper 2
Step 1
4.1.1 The TYPE of addition reaction
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Answer
The reaction can be classified as a Electrophilic Addition Reaction. In this type of reaction, the alkene reacts with an electrophile, resulting in the formation of a saturated compound.
Step 2
4.1.2 ONE observable change which occurs in the container during the reaction
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One observable change is the decolorization of bromine water. The reddish-brown color of bromine disappears as it reacts with the alkene.
Step 3
4.1.3 The STRUCTURAL FORMULA of compound Q
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The structural formula of compound Q can be represented as follows:
H Br
| |
H--C==C--H
| |
H H
This structure shows the addition of the bromine atom to the original double bond.
Step 4
4.1.4 Write down the IUPAC name of compound R
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The IUPAC name of compound R is 2-bromo-2-methylpropane. This name reflects the presence of bromine and the branching in the carbon chain.
Step 5
4.1.5 A balanced equation using STRUCTURAL FORMULAE for the organic compounds
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The balanced equation for the reaction can be formulated as:
H H
| |
H--C==C--H + HBr → H--C--C--H
| |
Br H
This illustrates the addition of HBr across the double bond.
Step 6
4.1.6 The IUPAC name of alcohol P
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The IUPAC name of alcohol P is 2-methylpropan-2-ol. This indicates the two methyl groups attached to the hydroxyl functional group.
Step 7
4.1.7 Write down the TYPE of elimination reaction
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The type of elimination reaction is known as Dehydration Reaction. This process involves the removal of a water molecule, typically from an alcohol.
