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

How do concentration and temperature affect the rate of a chemical reaction between magnesium and hydrochloric acid?

Extracts from this document...

Introduction

´╗┐How do concentration and temperature affect the rate of a chemical reaction? Collision theory:- Chemists believe that the theory explains how the various factors affect reaction rates. It is believed that molecules are only able to react if they bump into each other. When molecules are colliding with each other it can lead to other theory?s affecting this such as concentration, temperature and catalysts. The theory states that when molecules are colliding with one another atoms can break and new bonds form creating new molecules. There are molecules in gases and liquids which are always in constant motion colliding in millions. Many reactions are not successful only some are successful and this is because some reactions have collisions in which the molecules are moving around giving the bonds the strength to break (activation energy). ...read more.

Middle

â More chance of successful collision (overcome activation energy) â Increased rate of reaction The more concentration there is within a dissolved reactant, the quicker the rate of a reaction. The higher the concentration the more particles present within a given space this then result in a higher chance that the particles colliding with each other and therefore increasing the rate of reaction. The different concentrations within a given space varies, this means that the more particles there are the more likely they are able to collide with one and another and this increases the chance of collisions forming products. My results and graphs Time (s) Sample 1/Rep 1 Sample 2/Rep 2 Sample 3/Rep 3 Average volume (cm3) of Hydrogen gas (H2) collected 0 0 0 0 0 5 9 12 11 10.6667 10 30 32 29 19.6667 15 25 29 30 28 20 30 34 35 33 25 33 ...read more.

Conclusion

To measure the rate of reaction I have added tangents to the graph. The rate of reaction is basically the tangents gradient which can be calculated by the formule change in y/ change in x. The initial rate of reaction in 2.13 dm3/s. and the final rate is 1.33dm3/s Average amount of H2 released in 60 seconds Y=0.4x TIME (s) The reaction above shows a much linear graph, this is because the reaction want finished in the first 60 seconds, and thus I wasn?t able to calculate the final rate of reaction. My initial rate of reaction was 0.4 dm3/s and the rate of the reaction in the middle was 0.36dm3/s The graph above I have inserted both the data value to present a much clearer comparison. The affect of concentration can clearly be distinguished. The 1.8mol/dm3 concentration of HCL was much quicker than 06mol/dm3 as there Higher Concentration so more particles in given space. More chance of successful collision (overcome activation energy).Increased rate of reaction ...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 Physical 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 AS and A Level Physical Chemistry essays

  1. Investigating the Rate of the Reaction between Bromide and Bromate Ions in Acid Solution

    less than 0.1%, pour down foul-water sink o Sulphuric acid, H2SO4, aqueous o Risks: IRRITANT at low concentrations used in experiment; can cause severe burns o Emergencies: If spilt on skin or clothes, remove contaminated clothing and quickly wipe as much liquid as possible off the skin with a dry

  2. Investigating how concentration affects rate of reaction

    The diagrams below show this effect: (1, pg 221) Temperature: When to molecules collide, they must do so with enough energy for the reaction to take place. If the temperature of the reactants is increased, the energy of the molecules will increase. This also means that the molecules will move at a faster speed, meaning that collisions are likely to occur sooner.

  1. Investigating the rate of reaction between peroxydisulphate(VI) ions and iodide ions

    1 50.04 25.02 12.51 6.26 3.13 1.56 0.78 99.30 2 68.00 34.00 17.00 8.50 4.25 2.13 1.06 134.94 3 98.31 49.16 24.58 12.29 6.14 3.07 1.54 195.08 4 177.96 88.98 44.49 22.25 11.12 5.56 2.78 353.14 5 387.97 193.99 96.99 48.50 24.25 12.12 6.06 769.88 From this, I have chosen

  2. Mole Ratios in a Chemical Reaction

    This reaction happens because of strong attractive forces that certain ions have for each other, which combine and fall out of the solution in the form of a solid. When two aqueous solutions combine and form a solid, precipitate is formed.

  1. Investigating the effect on the rate of reaction when changing the acid that is ...

    I have determined that they are strong and weak by studying their Ka values[3]. I tried to keep consistency between strong acids and also between weak acids with this value. We had a limited choice of acids but the ones I have chosen have the best consistency.

  2. How does the temperature of water affect the amount of dissolved oxygen it contains?

    Precautions to follow include: 1. Cover all abrasions and if possible, wear good quality latex gloves. 2. Wash hands frequently and always wash hands prior to eating. 3. Wear a protective smock, apron or lab coat, and surgical or rubber gloves when working in the laboratory to protect clothes and skin.

  1. Individual investigation - Reaction to be studied Rate of reaction between propanone and ...

    > Put the stopper on the volumetric flask and mix the solution by turning volumetric flask up-down or shaking. COLORIMETRY Colorimetry is a way of determining the concentration of a chemical in a solution, if it has a color, is to measure the intensity of the color and relate the intensity of the color to the concentration of the solution.

  2. Using Catalysts to Manufacture Margarine

    Because of its good a relationship with electricity; it is used for things like electrical wiring. Another use of it is gas and water pipes; this is possible because it does not react with water. This makes it the perfect metal for plumbing in houses and most buildings, but it can also be used in factories.

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