4.1 The flow diagram below shows the conversion of propane to propan-2-ol - NSC Physical Sciences - Question 4 - 2021 - Paper 2
Question 4
4.1 The flow diagram below shows the conversion of propane to propan-2-ol.
Step 1
Br₂
X
Step 2
Propan-2-ol
4.1.1 State ONE reaction condition for Step 1.
4.1.... show full transcript
Worked Solution & Example Answer:4.1 The flow diagram below shows the conversion of propane to propan-2-ol - NSC Physical Sciences - Question 4 - 2021 - Paper 2
Step 1
State ONE reaction condition for Step 1.
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The reaction condition for Step 1 is the presence of heat or sunlight (radiation).
Step 2
Write down the NAME or FORMULA of the INORGANIC product formed in Step 1.
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The inorganic product formed in Step 1 is hydrogen bromide (HBr).
Step 3
Name the TYPE of substitution reaction represented by Step 2.
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The type of substitution reaction represented by Step 2 is nucleophilic substitution.
Step 4
Write down the NAME or FORMULA of the INORGANIC reagent needed in Step 2.
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The inorganic reagent needed in Step 2 is sodium hydroxide (NaOH).
Step 5
Write down the IUPAC name of compound X.
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The IUPAC name of compound X is 2-bromopropane.
Step 6
React chloroethane with (conc.) NaOH or NaOH in ethanol.
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The balanced equation for this reaction is:
C2H5Cl+NaOH(ethanol)→C2H4+NaCl+H2O
Conditions: Heat is applied during the reaction.
Step 7
Indicate heat/A (on the arrow) or as a reactant in the reaction of chloroethane.
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Heat is essential during the reaction of chloroethane to promote further reaction.
Step 8
Correct condensed formula for ethene as product.
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The condensed formula for ethene as product is C₂H₄.
Step 9
Product H₂O in the reaction of chloroethane.
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Water (H₂O) is produced in the overall reaction as one of the by-products.
Step 10
React ethene with H₂.
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The balanced equation for this reaction is:
C2H4+H2PtC2H6
Conditions: The reaction is conducted in the presence of a platinum catalyst.
Step 11
Indicate Pt on the arrow of at the reaction of ethene with H₂.
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The platinum catalyst (Pt) is used to facilitate the hydrogenation of ethene.
