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The large Leclanché cell

The large Leclanché cell

VC4.4.4.2_b

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This experiment/set up contains dangerous goods.
These are not available for online purchase.
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This product contains dangerous substances!

Description

The Leclanché cell is a zinc/coal battery. Here the negative pole is the steel-jacketed battery cup made of zinc. The positive pole is formed by a graphite bar which is surrounded by a mixture of graphite powder and manganese dioxide. An ammonium chloride solution (20 %) thickened by starch serves as the electrolyte. This prevents the cell from spilling out.

Experiment C4.4.4.2 demonstrates the principle of this dry cell. The voltage of the cell is first measured with the electrochemistry demonstration unit in the no-load condition. The Leclanché cell is then connected to the motor, and the voltage and current are measured simultaneously.

Reaction at the negative pole:

Reaction at the positive pole:

Reaction in the electrolyte solution:

Components of equipment sets

1	664398	Leclanché cell
1	6644071 8	Electrochemistry demonstration unit, CPS
1	301339 8	Stand bases, pair
1	500421 4	Connecting lead 19 A, 50 cm, red
1	500422 4	Connecting lead 19 A, 50 cm, blue
1	500411 4	Connecting lead, 19 A, 25 cm, red
1	500412 4	Connecting lead, 19 A, 25 cm, blue
1	602010 4	Beaker, Boro 3.3, 150 ml, tall
1	664131 4	Beaker Boro 3.3, 400 ml, squat
1	6668475	Magnetic stirrer with heating plate
1	6732210 4	Manganese(IV) oxide, 500 g Warning H302+H332 H373
1	6704010 4	Ammonium chloride, 250 g Warning H302 H319
1	6721500 4	Graphite, 50 g
1	6749210 4	Starch, soluble, 250 g

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The large Leclanché cell

Description

Components of equipment sets

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