Principle
When a strong acid is neutralised with a strong base in dilute solution, the same amount of heat is always released. If the reaction takes place under isobaric conditions, this heat is known as the enthalpy of neutralisation. The chemical reaction which generates this heat is the reaction of protons and hydroxyl ions to form undissociated water. It therefore correlates to the enthalpy of formation of water from these ions.
Benefits
- Simplified implementation: all pre-settings already prepared
- Calorimeters with particularly high capacitance
- Part of a system solution - Easily expandable for further experiments
Tasks
- Measure the temperature change during the neutralisation of a dilute potassium hydroxide solution with dilute hydrochloric acid.
- Calculate the enthalpy of neutralisation.
What you can learn about
- Enthalpy of neutralisation
- Calorimetry
- Heat capacity
Necessary accessories
- Precision balance 6200g/0.01g
Scope of Supply
| Device Name | Item no. | Qty |
|---|
| Beaker, Borosilicate, tall form, 600 ml | 46029-00 | 1,00 |
| curricuLAB measureLAB, multi-user license | 14580-61 | 1,00 |
| Hydrochloric acid, 1.0 mol/l, | 48454-70 | 1,00 |
| Potassium hydroxide pellets,50 | 30103-50 | 1,00 |
| Wash bottle, plastic, 500 ml | 33931-00 | 1,00 |
| Connecting cord, 32 A, 500 mm, black | 07361-05 | 4,00 |
| Beaker, Borosilicate, tall form, 100 ml | 46026-00 | 1,00 |
| Pasteur pipettes, 250 pcs | 36590-00 | 1,00 |
| Calorimeter, transparent, 1200 ml | 04402-00 | 1,00 |
| Rubber caps, 10 pcs | 39275-03 | 1,00 |
| Separator for magnetic bars | 35680-03 | 1,00 |
| Cobra4 Sensor-Unit Temperature | 12640-00 | 1,00 |
| Magnetic stirrer with heater MR Hei-Standard | 35751-93 | 1,00 |
| Pipettor | 36592-00 | 1,00 |
| Delivery pipette | 04402-10 | 1,00 |
| Rubber bulb, double | 39287-00 | 1,00 |
| Magnetic stirring bar 30 mm, oval | 35680-04 | 1,00 |
| Cobra4 Sensor-Unit Energy: Current, voltage, work, power | 12656-00 | 1,00 |
| Right angle boss-head clamp | 37697-00 | 2,00 |
| Potassium hydroxid for 1l 1mol | 31425-00 | 1,00 |
| Heating coil with sockets | 04450-00 | 1,00 |
| Pinchcock, width 15 mm | 43631-15 | 1,00 |
| Volumetric flask 500 ml, IGJ19/26 | 36551-00 | 2,00 |
| PHYWE power supply, universal DC: 0...18 V, 0...5 A / AC: 2/4/6/8/10/12/15 V, 5 A | 13504-93 | 1,00 |
| Supp.rod stainl.st.,50cm,M10-thr. | 02022-20 | 1,00 |
| Universal clamp | 37715-00 | 2,00 |
| Water, distilled 5 l | 31246-81 | 1,00 |
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