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Neutralisation Reaction

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Introduction

Neutralisation Reaction coursework Apparatus: The apparatus that I will be using in this experiment will be: * A Burette * A Clamp and Stand * 2x 50ml Beakers * A Conical Flask * A Measuring Cylinder * A Thermometer * Universal Indicator * 25ml Hydrochloric Acid * 25ml Sodium Hydroxide Method/Plan of the experiment: First of all, I will set up the apparatus as the diagram shows: Then, I will measure out the acid and alkali using the measuring cylinder. Once I have done that, I will pour the 25ml of Hydrochloric Acid in to the conical flask. I will also pour the 25ml of Sodium Hydroxide into the burette, and adding 1cm cubed of alkali at a time into the conical flask, I will record the temperature of the solution made by the two substances. ...read more.

Middle

Therefore there is an average rise in temperature. These stronger, bigger bonds are hot, and therefore cause the temperature of the solution to rise. Observations/Results: Volume of Sodium Hydroxide added* Temperature of Solution** Volume of Sodium Hydroxide added* Temperature of Solution** Volume of Sodium Hydroxide added* Temperature of Solution** 1 24 10 31 18 32 2 25 11 31 19 32.5 3 26 12 31 20 32.5 4 27 13 31 21 32.5 5 27 14 31 22 32.5 6 28 15 31.5 23 32.5 7 29 16 32 24 32.5 8 29.5 17 32 25 32 9 30 *all volumes in cm cubed. **all temperatures in degrees centigrade. As I had predicted, there was an increase in the temperature of the solution. The rise in temperature was steady, and constant, until the volume of Sodium Hydroxide added to the solution got nearer to making the solution neutral. ...read more.

Conclusion

From these results, I can take from this experiment that in every neutralisation reaction that takes place, heat is given out, meaning it is an exothermic reaction. Evaluation of experiment: Overall, the experiment went as planned, but if I were to perform it again, I would definitely make a few changes. The first one I would make would be to have a more reliable way of adding the alkali to the acid in the conical flask, maybe by scrapping the burette and using a measuring cylinder instead. This is because a couple of times I added a little bit more than I was supposed to, meaning the reading may have not been accurate. Another change I would make would be not to put the universal indicator into the conical flask, as this may have prevented the temperature from rising to more than it did. Having said all of this, I am happy with what I did and the way it went. Rob Hinchliffe, 10JA ...read more.

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