Page
  1. 1
    1
  2. 2
    2
  3. 3
    3
  • Level: GCSE
  • Subject: Science
  • Essay length: 1058 words

Rates of reactions between HCL and magnesium ribbon.

Extracts from this essay...

Introduction

Rates of reactions between HCL and magnesium ribbon Aim I plan to investigate the effect of concentration of acid, in the reaction between dilute hydrochloric acid and magnesium ribbon. The rate of a chemical reaction is a measure of how fast the reaction takes place. It is important to know that a rapid reaction is completed in a short period of time. Some reactions are very fast, for example; the formation of silver chloride precipitates when silver nitrate and hydrochloric acid solutions are mixed. In this investigation I will test different concentrations of acid reacting with magnesium. Prediction My prediction is that as the concentration of the hydrochloric acid increases, the time taken for the magnesium to disappear decreases. I predict that when the concentration of the hydrochloric acid doubles, the rate of the reaction doubles. Linking prediction to theory Reaction rate and concentration. The collision theory describes how the rate of reaction increases (the time taken for the magnesium ribbon to disappear when it is reacted with hydrochloric acid)

Middle

This way the rate of reaction(the time taken for the magnesium to disappear) was measured accurately for a fair test. Results The results for the time taken for magnesium to disappear when it is placed in different concentrations of acid are summarised below. Analysis of results From the results in the table and the graph we can see a steady increase in the rate of reaction as the concentration of the acid decreases. This complies with my prediction. The graph shows that there is an increase in the rate of reaction as the concentration increases because the graph has it's largest gradient or it is steepest at this point. When the graph was made into 1/time the result should have been a straight line graph but it did not turn out this way even though concentration~1/time. This 1/time graph could be wrong because of inaccurate results so there seems to be no relationship between the concentration graph and the 1/time graph.

Conclusion

particles which have to have the activation energy because they are the ones that are moving and bombarding the magnesium particles to produce magnesium chloride. The graph for 1/time had the form of an s curve and it did have some relationship with the other graph. Evaluation There are many reasons why our results for the 1/time graph did not prove the point that concentration~1/time, such as 1. When the reaction takes place bubbles of H2 are given off, which might stay around the magnesium, which therefore reduces the surface area of the magnesium and so the acid cannot react properly so this affects the results. 2. We could have controlled factors in the investigation better (e.g. the stirring of the solution because if this is not done properly it can lead to incorrect results). 3. Using larger concentrations of acid would give a bigger more accurate conclusion instead of just using 10ml test tubes use 1litre test tubes, this way graphs would be more spaced out and give an accurate form or curve.

The above preview is unformatted text

Found what you're looking for?

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

Not the one? Search for your essay title...
  • Over 180,000 student essays
  • Every subject and level covered
  • Thousands of essays marked by teachers

Related GCSE Patterns of Behaviour

  1. Rate of reaction of hydrochloric acid and mangesium ribbon.

    I then got a piece of magnesium ribbon about 1 cm long weighing 0.01g and dropped it into the acid and started timing the moment that the magnesium ribbon touched the acid solution. When the magnesium ribbon stopped fizzing, I stopped the clock and recorded the number of seconds (rounded up to nearest second)

  2. Exothermic and endothermic reactions

    Examiner's Note If you didn't get this you really must do the Fractional Distillation Revision Bite before you do this one Hydrocarbons Hydrocarbons are: * compounds that contain only carbon atoms and hydrogen atoms. * obtained from crude oil by fractional distillation and can be classified into different groups.

  1. Find out how different concentrations of HCl affect the rate of the reaction with ...

    The same results can be seen for the graph of concentration of CH3COOH against the rate of the reaction. Generally the rate of the reaction increases as the concentration of the reactants increase. This is because according to the kinetic theory the molecules in a liquid are constantly moving and bumping into each other.

  2. Rates of reactions between HCL and magnesium ribbon.

    Then 7ml of acid and 3ml of acid, repeated as above. This way the rate of reaction(the time taken for the magnesium to disappear) was measured accurately for a fair test. Results The results for the time taken for magnesium to disappear when it is placed in different concentrations of acid are summarised below.

  1. Determine the rate equation for the reaction of hydrochloric acid with magnesium metal, and ...

    0.00080 0.00340 0.13600 15 27.6 0.00115 0.00270 0.10800 20 32.4 0.00135 0.00230 0.09200 25 36.2 0.00151 0.00198 0.07933 30 38.2 0.00159 0.00182 0.07267 35 39.6 0.00165 0.00170 0.06800 40 41.4 0.00173 0.00155 0.06200 45 43.2 0.00180 0.00140 0.05600 55 45.0 0.00188 0.00125 0.05000 65 46.6 0.00194 0.00112 0.04467 75 47.8

  2. The aim of this investigation is to find out the effect of concentration of ...

    experiment was completed ,in case we lost them and to check for possible errors or gaps in our results and it helped us to spot patterns in the results. We calculated the different, concentrations of the acid throughout the experiment using the method below as in the table.

  1. Rates of reaction between Magnesium and HCl.

    Bunsen burner to heat the acid up to the appropriate temperature that is was needed. I attached a delivery tube to a burette, which was placed deep into a bowl of water, in order to measure the volume of hydrogen produced.

  2. Rates of Reaction Investigation - Magnesium Ribbon

    When the reaction takes place bubbles of H2 are given off, which might stay around the magnesium, which therefore reduces the surface area of the magnesium and so the acid cannot react properly so this affects the results. 2. We could have controlled factors in the investigation better (e.g.

  • Over 180,000 essays
    written by students
  • Annotated by
    experienced teachers
  • Ideas and feedback to write
    your own great essays

Marked by a teacher

This essay has been marked by one of our great teachers. You can read the full teachers notes when you download the essay.

Peer reviewed

This essay has been reviewed by one of our specialist student essay reviewing squad. Read the full review on the essay page.

Peer reviewed

This essay has been reviewed by one of our specialist student essay reviewing squad. Read the full review under the essay preview on this page.