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Determination of the enthalpy of neutralisation of acids and alkali solutions

C4.3.3.3
Determination of the enthalpy of neutralisation of acids and alkali solutions Determination of the enthalpy of neutralisation
Determination of the enthalpy of neutralisation of acids and alkali solutions
Determination of the enthalpy of neutralisation of acids and alkali solutions Determination of the enthalpy of neutralisation
Determination of the enthalpy of neutralisation of acids and alkali solutions
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Determination of the enthalpy of neutralisation of acids and alkali solutions

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Description

When strong acids and strong alkalis react with one another, energy is given off to the surroundings in the form of heat - the so-called 'heat of neutralisation'.
In experiment C4.3.3.3, measured quantities of hydrochloric acid and sodium hydroxide at the same temperature are neutralised together. The temperature increase DT is measured and from that result the quantity of heat QP is calculated:

From the quantity of heat, the following equation can be used to calculate the molar heat of neutralisation DRHm:

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1 524 005W2 Mobile-CASSY 2 WiFi LD
1 524 220  4  CASSY Lab 2 LD
1 529 676  4  Temperature probe, NiCr-Ni, 1.5 mm, type K LD
1 607 105  8  Magnetic stirrer mini LD
1 666 850  8  Stirring magnet, 15 mm x 5 mm diam. LD
3 602 023  4  Beaker, Boro 3.3, 150 ml, squat LD
2 665 753  4  Measuring cylinder 50 ml, with plastic base LD
1 300 11  4  Saddle base LD
1 301 26  4  Stand rod 25 cm, 10 mm Ø LD
1 301 09  4  Bosshead S LD
1 673 8400  4  Sodium hydroxide solution, diluted, aprox. 2 M, 500 ml LD
GHS05 Danger H314 H290
1 673 8420  4  Sodium hydroxide solution, 1 mol/l, 500 ml LD
GHS05 Danger H314 H290
1 674 6920  4  Hydrochloric acid, approx. 2 mol/l, 500ml LD
GHS05 Warning H290
1 674 6900  4  Hydrochloric acid, 1 mol/l, 500 ml LD
GHS05 Warning H290
1 671 9550  4  Acetic acid, dil., approx. 2 mol/l, 500 ml LD
GHS05 Warning H315 H319 H290
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