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

Investigating the Factors that Affect the Temperature Change During a Neutralisation Reaction.

Extracts from this document...

Introduction

Investigating the Factors that Affect the Temperature Change During a Neutralisation Reaction Aim The aim of this experiment is to find out how much the temperature of the acid/alkali solution will change during the reaction of the two using different concentrations of the hydrochloric acid. Safety For this experiment goggles must be worn at all times. Hair must be tied back and loose clothing must be tucked in. Hydrochloric acid at this concentration of 2M is very corrosive which means; this substance destroys living tissues including eyes and skin. Sodium Hydroxide at this concentration of 1M is corrosive which means; this substance destroys living tissues including eyes and skin. Prediction I predict that the temperature will change, as heat will be given of consequently making it an exothermic reaction of the acid and alkali. The concentration of the acid will have an effect on the alkali as if you use a more concentrated acid it will give you a higher temperature than a less concentrated one. As you increase the concentration of the acid there are more particles in the solution so more collisions will be occurring creating a higher temperature. ...read more.

Middle

Measure the temperature and record. Repeat this method three times for each different concentration. I will record the data in a table like this: ? M of HCl 1st Reading 2nd Reading 3rd Reading Av. Reading Start Temperature (O C) Finish Temperature (O C) Amount of alkali needed to neutralise (cm3) Results 2M of HCl 1st Reading 2nd Reading 3rd Reading Av. Reading Start Temperature (O C) 22.5 21 22 21.83 Finish Temperature (O C) 29 29.5 30 29.5 Amount of alkali needed to neutralise (cm3) 8 6 6 6.6 1.5M of HCl 1st Reading 2nd Reading 3rd Reading Av. Reading Start Temperature (O C) 21 21 21 21 Finish Temperature (O C) 28 28.5 28 28.2 Amount of alkali needed to neutralise (cm3) 6 6 6.5 6.2 1M of HCl 1st Reading 2nd Reading 3rd Reading Av. Reading Start Temperature (O C) 21 20 21 20.6 Finish Temperature (O C) 29 30 30 29.6 Amount of alkali needed to neutralise (cm3) 5 6 5 5.3 0.5M of HCl 1st Reading 2nd Reading 3rd Reading Av. Reading Start Temperature (O C) 22 20 20 20.6 Finish Temperature (O C) ...read more.

Conclusion

I feel that to increase the chance of improving the results in future experiments, then I should take more readings so I can leave the anomalous results out, to increase the chance of gaining a more successful set of results and averages. There are a few reasons why the results didn't go to plan: ? Lack of care when measuring, maybe a smaller measuring cylinder would reduce the possible chance of a human error. ? The alkali and water may not have been mixed properly. If the experiment were to be repeated then there would be a few changes to be made in order for the results to be more accurate: ? Using more concentrations to give a better range. ? Take more care when cutting the potato pieces. ? To use a more precise pipette (as the one used was only a grade 'B' standard) to measure correct amount of acid, alkali and water. To extend the experiment to see if different variables work you could try using other acids or alkalis, also you could try using different volumes instead of concentrations. This would provide additional evidence for the conclusion and also show how you could extend the experiment. Chemistry Coursework 1 Page ...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

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

    Investigation into the effect of acid/alkali strength on the heat change when acids and ...

    5 star(s)

    weaker ones is because a strong acid is one which fully dissociates into ions in an aqueous solution, and a weak acid only partially dissociates. Thus this allows more bonds to be created, therefore liberating more energy. The above will be tested in such an order, as it is believed

  2. Marked by a teacher

    Enthalpy of Neutralisation.

    3 star(s)

    and 1 atmosphere (atm), respectively. An enthalpy change measured under these conditions is described as standard enthalpy change and given the symbol ?H ?or ?H ?298 with a special superscript and subscript. The symbol ?H ?298 also implies that: All the substances involved in the reaction are in their normal

  1. Investigate a neutralisation reaction between hydrochloric acid and sodium hydroxide.

    23 23 21 21 21 21 21 29 28 29 28 29 0.8 23 23 23 23 23 21 21 21 21 21 28 27 27 26 28 0.6 23 23 23 23 23 21 21 21 21 21 27 26 26 25 26 0.4 23 23 23 23 23

  2. Investigation to find out the factors affecting heat of neutralisation, and then choosing one ...

    Instead I shall hold it at the top. TO MAKE MY EXPERIMENT SAFE I SHALL: * Wear an overall securely tied back throughout the entire investigation. * Wear goggles throughout the entire investigation * Wash my hands carefully and thoroughly after the experiments (working with acids and alkalis)

  1. To investigate the effect of concentration on the temperature rise, heat evolved and heat ...

    40.00 40.00 40.00 45.00 39.00 39.00 39.00 50.00 38.00 38.20 38.10 I have repeated my experiment twice for all the three concentrations of acid and alkali so that I will get an accurate enough average results of these two experiments.

  2. Mix an acid and an alkali and measure the temperature change.

    ' H' means 'the change in energy content.' It must have a sign to show whether the energy content has increased or decreased. For an exothermic reaction, H is negative. The reactants lose energy to give the products. Energy level diagrams like the one shown on the previous page can be used to show the energy changes.

  1. An Experiment to determine What Factors Affect Neutralisation of 25cm Sodium Hydroxide

    For this we ran some tests to find an indictor that showed clear colour changes: Indicator Colour of Indicator in Acid Colour of Indicator in Alkali Methyl orange Red Yellow Bromothymol blue Yellow Blue Phenol red Yellow Red Phenolphthalein Clear Pink Litmus Red Blue The clearest colour changes that we found were from the indicators Litmus, Phenolphthalein and Bromothymol blue.

  2. Energy Change Associated With Neutralisation

    This reaction is called an exothermic reaction. In my investigation my prediction is that the bonds will become stronger in the products. This is the equation for my reaction: sodium + hydrochloric sodium + water hydroxide acid cloride NaOH + HCl NaCl + H2O (base) (acid) (salt)

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