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

To investigate the individual factors which affect the rate of reaction between Magnesium and Hydrochloric acid.

Extracts from this document...

Introduction

Aim To investigate the individual factors which affect the rate of reaction between Magnesium and Hydrochloric acid. Background Information For a reaction to take place between two or more substances, in this case magnesium and hydrochloric acid, the reactants must first collide with each other. However, they also have to collide with a minimum amount of energy for a reaction to occur. This is called activation energy. The word equation for, when magnesium reacts with hydrochloric acid is: Magnesium + Hydrochloric acid Magnesium chloride + Hydrogen By looking at this equation I can tell that this will be an exothermic reaction, as hydrogen will be released in the form of energy. To explain this exothermic reaction, there is a simple energy profile below which helps to describe how the activation energy works. The graph above shows how much activation energy is needed for the particles to react for an exothermic reaction. If the particles collide with less than the required amount of activation energy then a reaction cannot take place. The graph above shows that the vast majority of the particles do not have enough energy for them to react. To allow these particles to react we can either change the shape of the curve or move the activation energy further to the left. To do this I can change one of the factors/variables that affect the rate of this reaction. ...read more.

Middle

so the total volume of the solution is 25cm3. 4) Pour the solution into the flask 5) Add the magnesium ribbon to the flask and replace the bung as quickly as possible. Get your partner to start the stopwatch at the same time. 6) Another person should be holding the measuring cylinder in the bowl as shown in the diagram during the reaction is taking place. 7) During the reaction is taking place hydrogen gas should travel through the delivery tube into the measuring cylinder. Read off the volume of hydrogen produced in the measuring cylinder from the meniscus every 10 seconds. 8) Record the results in a table until the reaction hasn't stopped. 9) Repeat all the steps above to do this experiment 2 more times, so that an accurate average can be obtained. 10) Repeat the experiment with different concentrations (from steps 2-9) for the following concentrations: * 12.5cm3 of 2 mol dm3 hydrochloric acid mixed with 12.5cm3 water (a concentration of 5:5) * 15cm3 of 2 mol dm3 hydrochloric acid mixed with 10cm3 water (a concentration of 6:4) * 17.5cm3 of 2 mol dm3 hydrochloric acid mixed with 7.5cm3 water (a concentration of 7:3) * 20cm3 of 2 mol dm3 hydrochloric acid mixed with 5cm3 water (a concentration of 8:2) * 22.5cm3 of 2 mol dm3 hydrochloric acid mixed with 2.5cm3 water (a concentration of 9:1) ...read more.

Conclusion

Evaluation As my method and plan was to make the experiment a fair test and if I had made sure that the results were exactly accurate, the results should have been near perfect. But because I could not ensure exact measurement was used, this could be a possible reason for the slight inaccuracy in the results. There is an inaccuracy that cannot be ruled out of my experiment, unless there is another way of performing the experiment, and that is human error. For example one of the major problems was that when some help from a friend was needed to start the experiment and this lead to a small delay in starting the stopwatch. Another problem was that some of our measurements were in decimals; we had to use a measuring cylinder, which was not very accurate either. Next time I could use a more accurate measuring device or keep it simple and just use whole numbers. To control the excess heat I could use cooling bars, which takes away any excess heat so it as at room temperature. Overall besides these possible errors I think my results are reliable because they show a pattern they back up my prediction and support the Generally the results I have obtained are reliable enough to support the conclusions I have come to about the values for the rates of reaction, the collision theory and the order of reactions because I did my experiment as accurately as possible. Disregarding the small sources of errors, which do not affect my results vastly. By Priya Arora 11TT ...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 Patterns of Behaviour 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 Patterns of Behaviour essays

  1. Marked by a teacher

    How dose temperature affect the rate of reaction between magnesium and hydrochloric acid.

    3 star(s)

    Ways of following a reaction Their are four general ways of following a reaction in Chemistry. I will have to deside which one we will follow, this is the base foe our method. I used the Chemistry revision guides that we have in school to find out about these different methods.

  2. Marked by a teacher

    The aim of this investigation is to investigate the rate of reaction of magnesium ...

    off the magnesium strips. I will then collect the hydrochloric acid and measure out 10ml in the measuring cylinder and pour it into the test tube. I will then put test tube in the test tube rack. After that is done I will measure 8ml of hydrochloric acid and 2ml of water in the

  1. How does changing the concentration of the Hydrochloric acid affect it reactions with Magnesium?

    Question My question is to see that if I change the concentration of the Hydrochloric acid for each experiment I will see an increase or decrease in the rate of reaction between Hydrochloric acid and Magnesium ribbon. COULD BE USED IN EVAL.

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

    boiling tube: 0, 5, 10, 15, 20, 25, 30, 35, 40, 50, 60, 70, 80, 90 and 600 seconds. As 15 readings in total were taken for each test, I was able to get a good curve because each measurement is an accurate average for the mid point of its range.

  1. Find out how the rate of hydrolysis of an organic halogen compound depends on ...

    PPM MINUTES (30 SEC INTERVALS) PPM 00.30 90 04.30 294 01.00 137 05.00 310 01.30 170 05.30 326 02.00 196 06.00 344 02.30 217 06.30 355 03.00 243 07.00 365 03.30 262 07.30 374 04.00 280 08.00 383 0.4 cm3 concentration: MINUTES (30 SEC INTERVALS)

  2. How does changing the concentration of hydrochloric acid affect its rate of reaction with ...

    A lower range should minimize this effect. I will also use a bigger strip of magnesium to make the reaction time longer in order for us to get the best possible results. Also to make sure that surface area does not limit the rate of reaction, I will use a

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

    The factors that may affect the rate of reaction are:- temperature of the Hydrochloric Acid, mass of the magnesium ribbon used, concentration of the Hydrochloric acid, surface area of the magnesium ribbon used All of these factors will change the rate of reaction because of the Collision Theory.

  2. Investigating the factors that affect the rates of reaction between magnesium and hydrochloric acid

    The syringe should only be so far off the ground so that you can attach it to a conical flask through a delivery tube. The syringe should be horizontal. Pour 50ml of HCL into the conical flask. You should have a bung like the one shown in the diagram.

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