Technical data

The solubility products of silver halides

Article no: P7401700

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Principle

When a few drops of a very dilute silver nitrate solution (c =0.01 mol/l) are added to a 1 molar solution of potassium halide solution (= KCl, KBr, KI), then there is an immediate precipitation of the corresponding silver halide (AgCl, AgBr, AgI), because the solubility product of these only very sparingly soluble salts is already exceeded even by these small amounts of added silver ions. Only that number of silver ions can remain free in these silver halide solutions, as are allowed to do so by the solubility product. As the relationship between the difference in concentration and the voltage in a concentration series follows the Nernst equation, the solubility product, or the silver ion concentration, of each silver halide solution can be calculated from the appropriate measured voltage.

Learning objectives

Influence of the solubility on the electrochemcial potential

Benefits

Easy teaching and efficient learning by using interactive experimentation PHYWE-Software
Experiment is part of a complete solution set with experiments for the topic Electrochemistry matched with international curriculum: all topics are covered

Scope of delivery

PHYWE Digital multimeter, 600V AC/DC, 10A AC/DC, 20 MΩ, 200 µF, 20 kHz, −20°C…760°C	07122-00	1
Connecting cord, 2 mm-plug, 5A, 500 mm, red	07356-01	1
Connecting cord, 2 mm-plug, 5A, 500 mm, blue	07356-04	1
Reducing plug 4mm/2mm socket, 2	11620-27	1
Alligator clip, insulated, 2 mm socket, 2 pcs.	07275-00	1
Block with 8 holes, d = 40 mm	37682-00	1
Coverage f.cell-meas.bloc,8 piec.	37683-00	1
Beakers, Boro, high form, various sizes	46025-00	4
Dropping bottle,plastic,50ml	33920-00	1
Pipettes with rubber cap, various sizes	64701-00	1
Silver foil, 150 x150 x 0.1 mm, 25g	31839-04	1
Emery paper, medium	01605-00	1
Set Strip electrode (Al, Fe, Pb, Zn, Cu)	07856-00	2
Silver nitrate sol. 0,1M 250 ml	30223-25	1
Potassium chloride 250 g	30098-25	1
Potassium bromide, 100 g	30258-10	1
Potassium iodide 50 g	30104-05	1
Potassium nitrate 250 g	30106-25	1