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

Rates of reaction

Extracts from this document...

Introduction

Rates of Reaction Introduction- Rates of reactions are how fast a reaction occurs. The factors that have an impact on the rate of the reaction are temperature, surface area, catalyst and concentrations. Temperature has an impact as when two chemicals react, their molecules have to collide with each other, and by heating the mixture you will be supplying high amounts of energy which will speed up the reaction. This is kinetic theory. Surface area has an impact on rate of the reaction as If one of the reactants is a solid, the surface area of that solid will affect how fast the reaction is, and this is because the two types of molecule can only bump into each other at the liquid solid interface. So the larger the surface area of the solid, the faster the reaction will be. Concentration has an impact as increasing the concentration of the reactants will increase the rate of collisions between the two reactants. ...read more.

Middle

2. Put 20ml of 2m HCl in a test tube. 3. Take the large sized marble chips and drop them into the test tube. 4. Start your stopwatch and stop it when the reaction stops when the large sized marble chip dissolves. 5. Record your observations. Test 2.- 1. Take 2g of medium sized marble chips. 2. Put 20ml of 2m HCl in a test tube. 3. Take the medium sized marble chips and drop them into the test tube. 4. Start your stopwatch and stop it when the reaction stops when the medium sized marble chip dissolves. 5. Record your observations. Test 3.- 1. Take 2g of small sized marble chips. 2. Put 20ml of 2m HCl in a test tube. 3. Take the small sized marble chips and drop them into the test tube. 4. Start your stopwatch and stop it when the reaction stops when the small sized marble chip dissolves. ...read more.

Conclusion

This was a major human error which changed our expected result. * We also were not precise in our measuring as we were meant to pour 20 ml of hydrochloric acid and we due to human error poured 2ml more or less, this must have impacted our experiment. * Another mishap was that we started our stopwatch before the calcium carbonate was dropped in the test tube as it was rather impossible to start the stopwatch at the exact time also we stopped the stopwatch 3-4 seconds after the reaction stopped. Improvements- We could have got a rather more accurate result if we would have been more careful. Extension- To extend this work we can- * We can experiment about the rates of reactions in factors like- concentrations, catalyst and temperature. * We can experiment with other more advanced factors that might slow the reaction rate. Written by- Kavya Sharma 8C (CLi) ...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

    the results of the calculations for the concentration of bromide ions for each volume of 0.01M KBr solution added: Volume KBr added / cm3 Concentration Br- solution at this volume / 10-3 mol dm-3 10.0 2.50 8.00 2.00 6.00 1.50 4.00 1.00 2.00 0.50 (Table 3.1.1)

  2. Investigating how concentration affects rate of reaction

    Instead, I chose the following range of temperatures: 10, 15, 20, 25, 30, 35 and 40�C. This range also makes it easier for me to keep the temperature of the reactants stable, as they do not fluctuate to far above or below room temperature.

  1. Investigating the rate of reaction between marble chips (calcium carbonate) and hydrochloric acid.

    I will repeat all experiments three times, so that the experiment will be more reliable. I have now carried out an experiment to investigate the accuracy of the top pan balance that I will be using. I placed ten nails in a Petri dish of weight 6.44g, and placed them on the top pan balance.

  2. To find out how the concentration of hydrochloric acid affects the rate of its ...

    If I use more acid in one experiment, then there will be more particles to react with. This will increase the chance of a successful collision and will therefore increase the rate of reaction. When I am measuring the acid, I will use a measuring cylinder and I will get

  1. rates of reaction

    The method I will be using is by seeing how long it takes for a black cross underneath the conical flask to disappear which will be the point in all the reactions where the concentration of the sulphur precipitate is equal and so will the rate can be fairly calculated.

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

    Add the 2-3 drops of starch indicator to the mixture and titrate the iodine (quenched mixture) with sodium thoisulfate solution which is present at the burette. 8. Titrate it until the colour of the solution turns to colourless. 9.

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