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Determination of the enthalpy of neutralisation of acids and alkali solutions

Determination of the enthalpy of neutralisation of acids and alkali solutions

VC4.3.3.3

Determination of the enthalpy of neutralisation

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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 Q_P is calculated:

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

Components of equipment sets

1	524005W2	Mobile-CASSY 2 WiFi
1	524220 4	CASSY Lab 2
1	529676 4	Temperature probe, NiCr-Ni, 1.5 mm, type K
1	607105 8	Magnetic stirrer mini
1	666850 8	Stirring magnet, 15 mm x 5 mm diam.
3	602023 4	Beaker, Boro 3.3, 150 ml, squat
2	665753 4	Measuring cylinder 50 ml, with plastic base
1	30011 4	Saddle base
1	30126 4	Stand rod 25 cm, 10 mm Ø
1	30109 4	Bosshead S
1	6738400 4	Sodium hydroxide solution, diluted, aprox. 2 M, 500 ml Danger H314 H290
1	6738420 4	Sodium hydroxide solution, 1 mol/l, 500 ml Danger H314 H290
1	6746920 4	Hydrochloric acid, approx. 2 mol/l, 500ml Warning H290
1	6746900 4	Hydrochloric acid, 1 mol/l, 500 ml Warning H290
1	6719550 4	Acetic acid, dil., approx. 2 mol/l, 500 ml Warning H315 H319 H290
1		additionally required: PC with Windows 7 or higher with WIFI or USB connection

Experiment Instructions

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C4.3.3.3 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

Description

Components of equipment sets

Experiment Instructions

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