3.8 - Aldehydes & Ketones

Question 1

Tollens’ reagent contains the complex ion ____ ?

Answer 1

[Ag(NH₃)₂]⁺

Question 2

Aldehydes are readily Oxidised to ____ ?

Answer 2

Carboxylic Acids

Question 3

Functional Group: Aldehyde

Answer 3

C(=O)-H

carbonyl

Question 4

Functional Group: Ketone

Answer 4

R-C(=O)-R

carbonyl

Question 5

Structural Suffix: Aldehyde

Answer 5

-CHO

Question 6

What type of isomers are Ketones & Aldehydes w/ same no. of Carbon atoms?

Answer 6

Functional Group Isomers

Question 7

Ketones ____ further Oxidised?

Answer 7

Cannot be

Question 8

General Formula: Ketone

Answer 8

CnH₂ₙO

Question 9

General Equation: Ketones reduced to Alcohols

Answer 9

R-C(=O)-R + 2[H] |> R-C-(H,OH)-R

Question 10

In balanced equations, how is the reducing agent simplified?

Answer 10

[H]

Question 11

Observation: Tollens’ + Aldehyde

Answer 11

Silver Mirror

Question 12

Colour Change H⁺/Cr₂O₇²⁻ + Aldehyde?

Answer 12

Orange |> Green

Question 13

General Formula: Aldehyde

Answer 13

CnH₂ₙO

Question 14

Reagent: Reduction of Aldehydes & Ketones to alcohols

Answer 14

NaBH₄

source of ∶H⁻

Question 15

Conditions: Reduction of Aldehydes & Ketones to alcohols

Answer 15

Aqueous, warm

Question 16

Aldehydes & Ketones are susceptible to attack by ____ ?

Answer 16

Nucleophiles because they have a δ⁺ Carbon

Question 17

Why does a Silver Mirror form?

Answer 17

Aldehyde Oxidised to Carboxylic Acid

Silver ions Reduced to Silver atoms

Question 18

Equation: Reduction of Silver ions

Answer 18

Ag⁺ + e⁻ |> Ag(s)

Question 19

General Equation: Aldehyde Oxidised to Carboxylic Acid

Answer 19

R-C(=O)-H + [O] |> R-C(=O)-OH

Question 20

Observation: Fehling’s + Aldehyde

Answer 20

Blue solution |> Brick Red ppt

Question 21

Equation: Reduction of Copper(II) ions

Answer 21

Cu²⁺ + e⁻ |> Cu⁺

Question 22

General Equation: Aldehydes reduced to Alcohols

Answer 22

R-C(=O)-H + 2[H] |> R-C-(H,OH)-H

Question 23

What causes a Brick Red ppt to form?

Answer 23

Copper(II) ions reduced to Cu⁺