• 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 how concentration affects rate of reaction

    It could be harder to work out a rate equation if I vary the concentrations of the reactants by different amounts to each other. Method for Investigating Concentration Change Apparatus: Apparatus Reason For Use Size/Concentration Burettes To store solutions before adding to mixture.

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

    I weighed the Petri dish containing the ten nails 7 times and recorded the different readings: 7.50g, 7.50g, 7.51g, 7.50g, 7.51g, 7.50g, 7.49g- the range is 7.51g-7.49g=0.02g The range is 0.02g, so I can conclude that my top pan balance is accurate, give or take 0.02g.

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

    If the first aider has concerns after treatment, seek medical help. o Hair on fire: Smother with a fire blanket, thick cloth or coat, whatever is close to hand. o Clothing on fire: Stop, drop and roll. This means stop the casualty moving around and make her/him lie down on the floor.

  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

    This will show me the affect of each reactant on the rate independently. The dependent variable is the one that will be monitored in the reaction. The dependent variable is the time taken for the reaction to take place which can be used to calculate the rate of the reaction.

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

    Take reading in different time interval (every 30 seconds up to maximum 6 minutes). 9) Once you take the reading, transfer the tube to the beaker containing hot water so that the temperatures would be constant.

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