• 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. Double Displacement Reactions

    I could not comprehend the complexity and the knowledge that would come out of a few simple and harmless experiments, such as this. Thus looking back I feel that I could have written a more complex and informative hypothesis.

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

    Risks: Low hazard; minimal risk o Disposal: Dilute in water, pour down sink o Potassium bromate, KBrO3, solid, aqueous o Risks: Solutions of concentration 0.005 mol dm-3 are TOXIC, OXIDISING; explosive when mixed with combustible material; toxic if swallowed; may cause cancer o Disposal: Dilute in water to concentration of

  1. Investigating how concentration affects rate of reaction

    For many reactions happening at room temperature (roughly 20-25�C), it is known that the rate of reaction doubles each time the temperature is increased by 10�C.(1, pg 224) However, this is not true for all equations and even equations where this is true the value may be slightly different, for example 9 or 11 rather than 10�C.

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

    Therefore, the time taken for the blue/black solution to form will roughly half. Table 3b therefore shows the theoretical times taken for the blue/black solution to appear based on my preliminary results. Table 3.5. Theoretical times (sec) taken for each temperature based on preliminary results Mixture 20�C 30�C 40�C 50�C 60�C 70�C 80�C Total theoretical time (sec)

  1. Chemistry Coursework: Investigating the effect of Concentration on the Rate of Reaction

    From the graph you can see that the 1M and 1.5M acids are still reacting, as the lines do not straighten out into a plateau, unlike the 2M and 2.5M which do, showing that they have almost all reacted. 70 22 24 25 24 80 26 27 28 27 90

  2. The Determination of rate equation

    diluted with 20cm� H2O. From this I can simply conclude that the reaction takes place quickly and further increasing concentration/ volumes would produce a faster reaction. This as a result would make it difficult to measure the exact point when a cloudy solution is formed (increasing the procedural error).

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

    > Rinse the watch glass at least twice so that maximum measured mass is dissolved into the beaker. > With the help of glass rod, stir it until the solid is dissolved in the beaker. > Transfer the solution to the volumetric flask from the beaker and rinse the beaker at least twice with distilled water.

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

    One can notice that bubbles form on the walls of the pot prior to reaching the boiling point. These cannot be filled with only water vapour because liquid water will not begin to vaporize until it has reached its boiling point.

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