The Tollens reaction

LC2.3.4.1
The Tollens reaction
The Tollens reaction

Description

Aldehydes and ketones both have a carbonyl group. Because of the terminal carbonyl group of aldehydes, they have a reducing effect and can be oxidised to carboxylic acids. In contrast, ketones cannot be oxidised to carboxylic acids. In the Tollens reaction, the reducing effect of the aldehydes is demonstrated by the reduction of silver ions to elemental silver. The students then recognise the differences in reactivity between aldehydes and ketones and can thus draw conclusions about the structure of the compounds.

Components of equipment sets

1 6748800  4 
Silver nitrate solution, 0,1 mol/l, 250 ml LD
GHS07GHS09 Warning H315 H319 H410
1 6703650  4 
Ammonia solution, diluted, 2 mol/l, 500 ml LD
GHS05 Danger H315 H318
1 6753410  4 
Water, pure, 5 l LD
1 6746650  4 
Nitric acid, diluted, approx. 2 mol/l, 500 ml LD
GHS05 Danger H314 H290
1 30945  4 
Universal pencil LD
1 667057  4 
Test tube rack metal, 20 mm Ø LD
4 6659531  4 
Dropping pipette 150 mm x 7 mm Ø LD
4 6659541  8 
Rubber bulb LD
2 6640421  4 
Test tube Fiolax 16 mm x 160 mm LD
1 664131  4 
Beaker Boro 3.3, 400 ml, squat LD
1 664441  4 
Evaporating dish porcelain, 61 mm Ø LD
1 610010  8 
Laboratory safety goggles LD
1 667609  4 
Safety gloves, nitrile rubber, size 8 LD
1 6753410  4 
Water, pure, 5 l LD
1 6700400  4 
Acetone, 250 ml LD
GHS02GHS07 Danger H225 H319 EUH066 H336
1 6744450  4 
Propanal, 100 ml LD
GHS02GHS07 Danger H225 H315 H319 H335
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