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

I am going to carry out an investigation to find out how concentration would affect the rate of reaction.

Extracts from this document...

Introduction

I am going to carry out an investigation to find out how concentration would affect the rate of reaction. The RATE of a reaction is the SPEED at which a reaction happens. If a reaction has a low rate that means the molecules combine at a slower speed than a reaction with a high rate. The rate of reaction depends on the type of molecules, which are combining. There is another big idea with rates of reaction, the COLLISION THEORY. The collision theory says that the more collisions, the more likely combinations of molecules will happen. So if there are a higher number of collisions, more combinations of molecules will occur, the reaction will go faster, and the rate of that reaction will be higher. We can measure the rate of reaction by timing how long it takes for Factors that affect the rate of reaction are: o Temperature o Surface Area o Concentration Temperature As you increase the temperature the molecules will move around quickly beacuse they have more energy. When they move around more quickly there more of a chance that the molecules will collide. This means that the molecules will be more likely to combine. When you lower the temperature the molecules are slower and there will be less collisions. As the temperature drops it lowers the rate of reaction Concentration of Acid If the solution is made more concentrated it means there are more particles of reactants knocking about between the water molecules, which makes the collisions between the important particles more likely. ...read more.

Middle

Volume of acid (ml) Time (secs) 1st 2nd 3rd Average 1 10 70 2 20 60 3 30 50 4 40 40 5 50 30 6 60 20 7 70 10 I will make sure that these readings are reliable by checking that the volume that I add of the water and acid is exact and that when the strip dissolves I stop the time exactly when it dissolves. The range that I have chosen is reliable because on the measuring cylinder the measurements go up in ten so i will be able to measure the volumes properly. Here are my results to my experiment: Readings Volume of water (ml) Volume of acid (ml) Time (secs) 1st 2nd 3rd Average 1 10 70 12 14 17 14 2 20 60 17 18 20 18 3 30 50 24 25 27 25 4 40 40 32 33 34 33 5 50 30 54 70 77 67 6 60 20 168 171 175 171 7 70 10 Took To Long I will not be taking any more readings because from the table I can see that my results are reliable and accurate because the results are showing what I predicted. I have processed my results on to a line graph because a line graph can show you much more clearly what you want to find out and what I have found out is that I can see pattern in my ...read more.

Conclusion

If I had to do this experiment again I would do it the same way and using the same apparatus but I would keep on changing the acid and water volumes and I would weigh the magnesium strips before I use them and I would check the temperature of the room to see if they are the same. If I were to extend this activity I would use temperature. Using temperature would provide me with further additional evidence for y conclusion because: Temperature As you increase the temperature the molecules will move around quickly beacuse they have more energy. When they move around more quickly there more of a chance that the molecules will collide. This means that the molecules will be more likely to combine. When you lower the temperature the molecules are slower and there will be less collisions. As the temperature drops it lowers the rate of reaction. If I did the temperature experiment I would find out that I would get similar results and conclusion. Other factors that might be useful to investigate are the surface area and catalysts. Catalysts A catalyst is a substance that speeds up the rate of reaction without being used itself up. They work by giving the reacting particles a surface to where they can stick to so that they can bum into each other. This then obviously increases the collision rate too. This document was downloaded from Coursework.Info - The UK's Coursework Database Click here to visit Coursework.Info/ ...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. Find out how the rate of hydrolysis of an organic halogen compound depends on ...

    PPM 00.30 235 01.00 336 01.30 427 02.00 517 02.30 610 03.00 691 03.30 766 04.00 846 04.30 915 05.00 974 25 cm3 ethanol and 25 cm3 water concentration: MINUTES (30 SEC INTERVALS) PPM 00.30 270 01.00 390 01.30 500 02.00 596 02.30 681 03.00 755 03.30 829 04.00 903

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

    The liquids will be measured using a measuring cylinder. * Amount of magnesium- this will be in excess so that the surface area doesn't limit the rate of reaction and in effect, the amount remains constant. * Surface area- this will be kept constant by using magnesium as the second reactant as it is uniform (the same size)

  1. Catalase activity in the liver

    or the temperature may not have been right. From 20?C to 30?C the amount of reaction does not double if it did the reading at 30?C should be a lot higher that it is which is 115mm. I also observed that the reaction did not take the same time but

  2. Effect Of Substrate Concentration On The Activity Of Catalase

    However, I did not test whether this was true for higher temperatures. If it was not, then there is the likelihood of major inaccuracies in the conducting of the experiment. Arefin Khan Source: Background information used during this investigation was obtained from Cambridge Advanced Sciences.

  1. What factors affect the activity of urease? What are the kinetics of the urea-urease ...

    - A magnetic stirrer was used to try to get the Sodium Carbonate solution to dissolve. Starting with 2M solution How much solution is needed? -100 cm3 at each dilution Concentration used Ratio 2M 100cm3 of 2M solution 1.0M 50cm3 2M + 50 cm3 water 0.5M 25cm3 2M + 75

  2. Science Coursework

    only 40.0cm3 Sodium Thiosulphate to be used and 10.0cm3 water to be used. But only 5.0m hydrochloric acid is to be used. 8.once the sodium Thiosulphate,. and water has been put in the flask and adds 5.0cm3 of hydrochloric acid.

  1. Investigating the affect of concentration on the rate of reaction between magnesium and hydrochloric ...

    This causes the rate of reaction to decrease. This is because there will be less collisions so there will be fewer collisions with an energy greater than or equal to the activation energy causing the rate of reaction to decrease and eventually be 0 when the reaction stops.

  2. Does concentration affect the rate of reaction between magnesium strips and hydrochloric acid?

    off, resulting in more energy provided for the particles so that they can react with each other and it will be increasing the rate of reaction leading to more successful and frequent collisions per second. I also predict that if you double the concentration of hydrochloric acid, then you will double the rate of reaction.

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