Edexcel A-Level Chemistry A2 15.12 The Reactions of Carboxylic Acids with I Lithium Tetrahydridoaluminate Iii Lithium Aluminium Hydride in Dry Ether Questions

Match each reagent to the functional-group change, then write the salt, acyl chloride, alcohol or ester product with the required condition or observation.

Exam points

Reduce a carboxylic acid to a primary alcohol using lithium tetrahydridoaluminate in dry ether.
Write acid-base equations with hydroxides, carbonates or hydrogencarbonates, including carbon dioxide effervescence and carboxylate salts.
Convert a carboxylic acid to an acyl chloride with phosphorus(V) chloride, giving the product equation and steamy hydrogen chloride fumes.
Identify the acid, alcohol and acid catalyst in esterification, then draw or name the ester product.

[Maximum number: 4]

This question is about carboxylic acids and their derivatives.

(a)

A reaction scheme involving butanoic acid is shown.

Figure for Question (a) — Edexcel A-Level Chemistry A2

Identify X, Y and Z by name or formula.
Alcohol X

Reagent Y

Compound Z

[ 3 ]

(b)

An organic compound E contains carbon, hydrogen and oxygen only.

[ 1 ]

(i)

Aqueous sodium hydrogencarbonate is added to a sample of E. No effervescence occurs.

State what can be deduced by this observation.

[ 1 ]

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Edexcel A-Level Chemistry A2 15.12 The Reactions of Carboxylic Acids with I Lithium Tetrahydridoaluminate Iii Lithium Aluminium Hydride in Dry Ether Questions question 1

Question (a)

Question (b)

Question (i)