• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

Chemistry Coursework : Neutralisation

Extracts from this document...

Introduction

Chemistry Coursework : Neutralisation Prediction: I predict that the reaction will be endothermic. If we increase the concentration of acid, the temperature change will increase. Background information: Reactions: An EXOTHERMIC REACTION is one which usually one which gives out energy to the surroundungs, usuually in the form of heat and usually shown by a rise in temperature. An ENDOTHERMIC REACTION is one which takes in energy from the surroundings, usually in the form of heat and usually shown by a fall in temperature. ...read more.

Middle

For endothermic reactions the energy change is positive , i.e heat is needed. A exothermic energy change indicates an exothermic reaction, ie heat is released. Virtually all chemical reactions involve energy changes. Whether they are exothermic or endothermic depends on the balance between the energy needed to break bonds in the reactant, and the energy released when bonds are made in the products. Aparatus: 3 Polystyrene beackers 3 Plastic lids 3 Thermometres (-10 - 110*C) 3 Measuring cylinders (50ml) ...read more.

Conclusion

Also we should wait 30 seconds before taking the temperature of each solution. We found out that all in our pilot method would also apply for our real method, as our prediction reflected are results. Method: Measure 20ml of hydrochloric acid and take the temperature after leaving it for 30 seconds. Then in a seperate measuring cylinder measure out 20ml of Sodium hydroxide, pour into a polystyrene beaker, and again take the temperature after 30 seconds. Mix both of them together and record the highest temperature. Repeat this for every temperature as shown in the table below: ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our AS and A Level Energy, Respiration & the Environment section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related AS and A Level Energy, Respiration & the Environment essays

  1. Marked by a teacher

    Fighter Pilot A Statistical Analysis of Reaction time and its Correlation with Dominant ...

    5 star(s)

    to be made and gave an idea of possible changes within the variables before performing the actual test. A group of ten women of a young age were used, although finding subjects that would pass the above criteria proved to be somewhat more difficult than expected and a leniency on the controlled variables may have to be allowed.

  2. Biology Beetroot Coursework

    Place the remaining test tubes in water baths of different temperatures such as 45�C, 55�C, 65�C, 75�C and 85�C. Make sure that the thermometer has clarified the temperatures to be exact as this will ensure accuracy. This ensures a good range and will make sure that a distinct difference is recognised.

  1. the effect of bile concentration on the activity of the enzyme lipase during the ...

    However because the bile salts are not heated to this temperature when they are added to the milk the temperature will drop immediately meaning we will not be carrying the temperature at the 37oC we thought and the temperature could be anything when we start the experiment.

  2. Investigating the effects of Sodium Hydroxide concentration on Catalase

    13 23 15.6 30 6 4 5 5 8 14 10 10.6 15 14 15 14.6 8 14 14 12 12 15 24 17 35 6 4 6 5.3 9 15 12 12 17 13 17 16.3 10 15 15 13.3 14 16 25 17.6 40 6 5 6 5.6

  1. Yeast Coursework

    The lock and key hypothesis is the mechanism of enzyme action. Enzymes are proteins folded into a three-dimensional shape. The part of the enzyme that allows it to act as a catalyst is called the active site, which is shown on the next page.

  2. Investigate the effect of bile salt concentration on the digestion of milk by the ...

    Trial two was to see if changing the concentration of the bile salts from 5% to 1% still yielded a good graph in a reasonable amount of time. After doing the trial the graph was not steep at all and the gradient that I got was not good, as even

  1. Discuss the Advantages and Disadvantages of being Ectothermic and Endothermic in the Vertebrates.

    or orientation. Many ectotherms live in burrows (controlled microhabitats) and only emerge for a certain period each day when the temperature is warm (or cool) enough for them to be active, the remaining time they spend in a torpid state.

  2. Eyesight coursework

    With very carefully focused laser beams sections are removed from the cornea of the eye thereby altering its focusing power. At present, however, it is only available for dealing with short sight. Describe what presbyopia (old sight) is and how that is corrected During middle age, usually beginning in the 40s, people experience blurred vision when doing things close up.

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work