SN1, SN2, and Alkyl Halides Reaction

Question 1

1-chloropropane reacts with an aqueous sodium hydroxide solution.

Which one is true?
A. 1-chloropropane is a primary alkyl halide and follows an SN2 reaction.
B. 1-chloropropane is a primary alkyl halide and follows an SN1 reaction.
C. 1-chloropropane is a tertiary alkyl halide and follows an SN2 reaction.
D. 1-chloropropane is a tertiary alkyl halide and follows an SN1 reaction.

Answer 1

A. Because 1-chloropropane is a primary alkyl halide with one R group attached to the carbon with two H atoms surrounding it.

Question 2

CH3CHBr(CH3)CH3 + NaOH –> CH3CHOH(CH3)CH3 + NaBr

What is the name of the haloalkane and the alcohol produced from this reaction?

Answer 2

Haloalkane: 2-bromo, 2-methylpropane
Alcohol: 2-methylpropan-2-ol.

Question 3

Identify which one is tertiary, primary, or secondary.
1. 2-chloropropane
2. 1-bromo, 2-methylpropane
3. 2-bromo, 2-methylpropane
4. 3-iodopentane

Answer 3

1. Secondary
2. Primary
3. Teritary
4. Primary

Question 4

Read the question to answer this section.
1. SN2 reacts with primary alkyl halides
2. SN1 forms a carbocation in the intermediate reaction.
3. SN2 reacts with tertiary alkyl halides.
4. SN1 reacts with tertiary alkyl halides.

What statements are true about SN1?
A. 1,2,3, and 4.
B. 2 and 3
C. 2 and 4
D. 4 only

Answer 4

C. Both statements from 2 and 4 are true about SN1.

Question 5

What happens when Sodium hydroxide is dissolved in the ethanol to form ethanolic sodium hydroxide and reacts with 1-bromoethane?

A. It will react in a nucleophilic substitution
B. It will react in an elimination reaction
C. It will react in an SN2 mechanism
D. No reaction at all

Answer 5

B. When the conditions of the NaOH are changed from aqueous to alcoholic, there is no nucleophilic substitution. It will form a double bond to form ethene.

Question 6

Answer 6

B.

Question 7

Answer 7

C.

Question 8

Answer 8

C.

Question 9

Select two statements that are true in the question

This is the synthesis to make butanoic acid. What statements are true?
1. X is an SN1 reaction to form butanenitrile
2. Y is a nucleophillic substitution of the CN functional group
3. Y uses Hydrochloric acid and water to form butanoic acid and ammonium chloride
4. X uses HCN to form butanenitrile

Answer 9

1 and 3

Question 10

Answer 10

C.

Question 11

Use your notes if you struggle in the medium section of this revision

Answer the question on the picture

Remember that the halogen with a bigger atomic radius has a lower bond energy of the C-X bond.

Answer 11

D.

Question 12

Answer 12

C.

Question 13

Answer three of this questions

Look at the picture of the mechanism.
1. What is the category of the haloalkane in the picture before the reaction?
2. What is the name of this mechanism?
3. What are the reactants?
4. What are the products?
5. What is the use of the Ethanol in the solution?

Answer 13

1. Primary haloalkane
2. SN2 mechanism
3. 1-bromoethane and (either NaOH or KOH is accepted)
4. Ethanol and (either NaBr or KBr).
5. Ethanol makes the 1-bromoethane soluble since the haloalkane is insoluble in water.

Question 14

Answer 14

C.

Question 15

Read the question and show working

A student conducts an experiment where ethanol is oxidised to ethanoic acid. The student acidifies the 20 cm^3 solution of Dichromate(VI) ions of 0.090 mol dm^-3. The student collects 30 cm^3 of the carboxylic acid. Calculate:
a) The equation of the oxidation of ethanol with Dichromate(VI)
b) The number of mols of the dichromate solution
c) Use your results from b) to find the number of mols of ethanoic acid.
d) Calculate the pH when the ka constant is 5.54 x 10^-4.

Use ka = ([H+][A-])/[HA]

Answer 15

Question 16

You have finished the SN1 and SN2 revision

Answer 16

Good Luck!