Solubility product with Cobra SMARTsense Principle The solubility of poorly soluble salts is expressed as the solubility product, i.e. the product of the concentration of cations and anions in the solution which are in equilibrium with the solid salt. These concentrations can be determined via conductivity measurements. Benefits - Good and reproducible results due to temperature control in the experiment.
- The use of the compact Cobra4 Mobile-Link is space-saving.
Tasks - Measure the conductivities of saturated aqueous solutions of the salts calcium fluoride and calcium carbonate at 25 °C.
- With the aid of tabulated ionic conductivities, calculate the solubility products of the salts from their conductivities.
Learning objectives - Solubility
- Dissociation
- Electrolytic conductance
- Activity
Necessary accessories - Precision balance 620g/0.001g
Software provided. Computer not included.
Scope of delivery |
Cobra SMARTsense - Conductivity, 0...20000 µS/cm, 0...60°C (Bluetooth)
|
12922-01
|
1
| |
Immersion thermostat Alpha A, 230 V
|
08493-93
|
1
| |
External circulation set for thermostat Alpha A
|
08493-02
|
1
| |
Bath for thermostat, makrolon
|
08487-02
|
1
| |
Rubber hose, various diameters
|
39282-00
|
3
| |
Hose clip, diam. 8-16 mm, 1 pc.
|
40996-02
|
4
| |
Retort stand, h = 750 mm
|
37694-00
|
2
| |
Right angle boss-head clamp
|
37697-00
|
3
| |
Universal clamp
|
37715-01
|
3
| |
Magnetic stirrer without heating, 3 ltr., 230 V
|
35761-99
|
1
| |
Magnetic stirring bar 30 mm, cylindrical
|
46299-02
|
2
| |
Erlenmeyer flasks, Boro, narrow neck, various sizes
|
46141-00
|
4
| |
Powder funnels, plastic, various sizes
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34472-00
|
1
| |
Spoon, special steel
|
33398-00
|
1
| |
Mortar w. pestle, 70ml, porcelain
|
32603-00
|
2
| |
Weighing dishes, square shape, 84 x 84 x 24 mm, 500 pcs.
|
45019-50
|
1
| |
Wash bottle, plastic, 500 ml
|
33931-00
|
1
| |
Calcium carbonate 500 g
|
30052-50
|
1
| |
Calcium fluoride, powder, purum, 100 g
|
31175-10
|
1
| |
Standard solution 1413µS/cm(25°C), 460ml
|
47070-02
|
1
| |
Water, distilled 5 l
|
31246-81
|
1
| |
Tubing connector, ID 6-10mm
|
47516-01
|
2
| |
measureLAB, multi-user license
|
14580-61
|
1
|
|
Service
