• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month
Page
  1. 1
    1
  2. 2
    2
  3. 3
    3
  4. 4
    4
  5. 5
    5
  6. 6
    6
  7. 7
    7
  8. 8
    8
  9. 9
    9
  10. 10
    10

Investigating The Energy Change During A Neutralisation Reaction.

Extracts from this document...

Introduction

Investigating The Energy Change During A Neutralisation Reaction INTRODUCTION: How the change in temperature affects the amount of energy taken in, or given out during a neutralisation reaction? AIM: I am going to investigate the change in temperature, which happens during the process of neutralisation. The acid I will use is Hydrochloric Acid and my alkali will be Sodium Hydroxide. Acids and Alkali's react together to form neutral substances, this is a process, which is known as neutralisation. A neutralisation reaction takes place when an acid and an alkali react with each other to form salt and water. The strength or weakness of an acid or alkali is measured on a pH scale. A strong acid will be on a pH of 1.5, however, a strong alkali will have a pH of 14, and the pH value of 7 would be neutral. Acids are soluble in water, the react with carbonates to give salt, carbon dioxide and water. Acid solutions also conduct electricity but are decomposed by it, which shows that the acids consist of ions, which suggests that all acids contain H+ ions. FACTORS THAT AFFECT THE ENERGY CHANGE / VARIABLES: > TEMPERATURE > Concentration of Sodium Hydroxide > Concentration of Hydrochloric Acid > The Volume of Acid and Alkali INDEPENDANT VARIABLE: The factor I will change during the experiment will be the amount of Hydrochloric acid. ...read more.

Middle

> A Beaker > Polystyrene Cup > Thermometer > Burette > Glass Rod DIAGRAM: FAIRNESS: To keep the experiment fair certain things will need to be done and kept the same whilst one variable is changed. I have chosen to vary the temperature. Firstly, and most importantly, I will have to get the measurements of the hydrochloric acid, sodium hydroxide and water as accurate as possible. I will make sure that the amounts of hydrochloric acid are accurate, the sodium hydroxide is the same amount 20ml and I keep it at 1molar all the time, also the amount of water I dilute it with has to be accurately measured as it could interfere with my results. Secondly, I must make sure I am accurate with measuring the temperature at the beginning of the experiment. Also, when adding the acid in the sodium hydroxide and water I must make sure the stop clock is started at the same time. I must make sure that I am accurate with starting and stopping the stop clock; otherwise this factor could meddle with my results as well. When measuring the temperature after the reaction has taken place and the one-minute is up I must make sure this is measured accurately as this is the result, which is most important. ...read more.

Conclusion

If I conducted this experiment again, I would change some of the experiment, I would change the timing I would allow more time for the reaction to take place so I would get clearer results, I would increase the time by a minute, so hopefully altogether two minutes would be enough for the reaction to fully take place in. The clearer results would enable me to produce accurate graphs. I would also make sure my measurements were accurate if I was to do the experiment again, I would use a pipette to gain a more precise measurement of the acid and alkali, and in a larger-scale a measuring cylinder. I believe that my experiment was fair. I followed all of the guidelines that I set out to make a fair test. The only difficulty I had was that I had put a time limit on the reaction-taking place so I would not no when the reaction finished and I could have gained better results if there was not a limit on it. To gain extra information for my scientific knowledge, I could have used more textbooks to make the information more detailed. To conclude I feel that that this investigation was carried out very carefully, my results turned out good and my graphs were plotted with great accuracy. Henal Patel 1 ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our GCSE Aqueous Chemistry section.

Found what you're looking for?

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

Here's what a teacher thought of this essay

4 star(s)

****
A good account of the experiment with clear explanations of the steps followed and detailed background information. A little more careful use of scientific terminology would be be helpful however.

Marked by teacher Adam Roberts 14/10/2013

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 GCSE Aqueous Chemistry essays

  1. Marked by a teacher

    To determine the amount of ammonia in a sample of household cleaning product, 'cloudy ...

    5 star(s)

    From the equation, the ratio of n(HCl) : n(NH4OH) is 1:1 ? n(NH4OH) in a 20.0ml sample = 9.22510^-04 moles ? n(NH3) in a 20.0ml sample = 9.22510^-04 moles 3. Concentration of (NH3) = = 0.0461M ? n(NH3) in a 250.0ml sample = 0.0461 0.25 = 0.01153 moles 4.

  2. Titration Experiment

    of one or more species.your titrant is commonly an oxidizing agent although reducing titrants can be used. The equivalence point is based on the concentration of the oxidized and reduced form of all species involved. Some of this information has been used from www.google.com and www.wikipedia.com Evaluation During the course of my practical, I had encountered errors.

  1. To investigate three factors that affect the rate of cooling a liquid and to ...

    Experiment 3 From looking at the final set of results my predictions were once again quite precise. I predicted that the bad conductor, glass, would cool the most slowly and the best conductor, copper would cool the most quickly. The water in the glass container cooled to 54?C in twelve

  2. Determine Solubility of KClO3 Salt.

    And then followed by the break up of solvent-solvent intermolecular bonds. After the solutes and solvents intermolecular bonds are break up, the formation of cavity in solvent phase is appearing to be large enough to accommodate solute molecule. The solute will vaporize into the cavity of solvent phase.

  1. To investigate the rate of reaction between different concentrations of hydrochloric acid with metal ...

    in any given volume. So there will be twice as many collisions between the carbonate ions and the H+(aq) ions in a given time. Therefore, there will be twice as many effective collisions in a given time as there will be twice the number of particles with energy ?Ea (activation energy needed to make the reaction).

  2. In this investigation I will get a number of unknown organic compounds to which ...

    precipitate Silver mirror is formed - ALDEHYDE Unknown D Positive turns red Positive decolourises bromine - - - PHENOL Now that I have identified the functional groups of the unknowns using the chemical techniques, I will now use the spectra provided to confirm these results.

  1. Investigating the effects of varying pH levels on the germination of cress seeds

    I therefore believe that this is justified as the experiment could be developed and the results could lead towards a solution to the problems of acid rain on a global scale. METHOD * I will measure out each solution (using volumes as previously described)

  2. Investigate the rate of diffusion of Hydrochloric Acid into Gelatine.

    This is true because more acid particles can collide with the gelatine, as there is a big surface area for its volume. Also my prediction the other way around was correct by a small surface/volume ratio would take longer. This is because is has a smaller surface area for its volume and so less acid particles collide and react.

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