Determination of the enthalpy of neutralisation of acids and alkali solutions

VC4.3.3.3
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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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 524005W  8  Mobile-CASSY 2 WiFi LD
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1 529676  4  Temperature probe, NiCr-Ni, 1.5 mm, type K LD
1 607105  8  Magnetic stirrer mini LD
1 666850  4  Stirring magnet, 15 mm x 5 mm diam. LD
3 602023  4  Beaker, Boro 3.3, 150 ml, squat LD
2 665753  4  Measuring cylinder 50 ml, with plastic base LD
1 30011  4  Saddle base LD
1 30126  4  Stand rod 25 cm, 10 mm Ø LD
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1 6738400  4  Sodium hydroxide solution, diluted, aprox. 2 M, 500 ml LD
GHS05 Danger H314 H290
1 6738420  4  Sodium hydroxide solution, 1 mol/l, 500 ml LD
GHS05 Danger H314 H290
1 6746920  4  Hydrochloric acid, approx. 2 mol/l, 500ml LD
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1 6746900  4  Hydrochloric acid, 1 mol/l, 500 ml LD
GHS05 Warning H290
1 6719550  4  Acetic acid, dil., approx. 2 mol/l, 500 ml LD
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