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Thermometric Titration

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Introduction

CHEMISTRY COURSEWORK (II) THERMOMETRIC TITRATION by Andrew McLorn Planning Normally we use an indicator when doing titration experiments, in this experiment we will not be using an indicator. Instead we will be monitoring the temperature of the solution. When an alkali is mixed with an acid heat is given out, this is called an exothermic reaction. The temperature goes up until the acid is neutralised and then no more heat is given out because the reaction is over. ...read more.

Middle

addition of NaOH Displaying the Results Results should be displayed in a graph and a table like the one shown below: Safety The following safety precautions should be observed when carrying out this experiment: .assemble apparatusin the centre of an uncluttered bench .take care as acid is being used .wear goggles Conclusion As expected, the temperature of the solution increased with the volume of NaOH until a point, when the temperature is 28.4 oC and the volume of NaOH is about 28cm3. ...read more.

Conclusion

Using m1 x v1=m2 x v2 we can work out the molarity of the alkali. molarity of acid molarity of alkali multiplied by = multiplied by volume of acid volume of alkali 25 = m2 x 28 m2 =25/28 m2 =0.9m I have know got an approximate value of the molarity of the alkali at 0.9m. Evaluation I think that the experiment has worked well, because the end result is the one that I expected to happen and I was able to work out the molarity of the alkali. If I was to do it again I would add the NaOH in intervals of 3cm3 instead of 5cm3 to increase accuracy. RESULTS ...read more.

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