• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month
  1. 1
  2. 2
  3. 3
  4. 4
  5. 5
  6. 6
  7. 7
  8. 8
  9. 9
  10. 10
  11. 11
  12. 12
  13. 13

Find out the factors that affect the rate of reaction.

Extracts from this document...


Science Investigation RATES OF REACTION Secondary resources From research I can find out the factors that affect the rate of reaction. Collision Theory. A chemical reaction can only occur between particles when they collide (hit each other). Particles may be atoms, ions or molecules. There is a minimum amount of energy which colliding particles need in order to react with each other. If the colliding particles have less than this minimum energy, then they just bounce off each other and no reaction occurs. This minimum energy is called the activation energy. The faster the particles are going, the more energy they have. Fast moving particles are more likely to react when they collide. You can make particles move more quickly by heating them up (raising the temperature). Changing the Rate of a Reaction. There are 5 ways to increase the rate of a chemical reaction. They are all understood in terms of Collision Theory. The rate of a chemical reaction may be increased by; 1) Raising the Temperature. 2) Increasing the Concentration (in solution). 3) Increasing the Pressure (in gases). 4) Increasing the Surface Area of a solid. 5) Use a catalyst. The 1, 2, 3 and 4 above will decrease the rate of reaction. A catalyst will change the rate of reaction. A catalyst can make a reaction go faster or slower. In practice, a catalyst is mainly used to make a reaction go faster. The resource above was found in the Internet and the web site that this was found on is ; http://www.gcsescience.com/xrc.htm How does temperature affect the rate of a chemical reaction? When two chemicals react, their molecules have to collide with each other with sufficient energy for the reaction to take place. This is collision theory. The two molecules will only react if they have enough energy. By heating the mixture, you will raise the energy levels of the molecules involved in the reaction. ...read more.


Time (s) Rate of reaction (1/time) Amount of gas to collect (Cm3) 8cm 1 25 35.23 0.0284 40 8cm 1 25 20.03 0.0499 40 5cm 1 25 24.16 0.0414 40 Another thing that we found when doing the pre-test is that all the magnesium should be submerged into the hydrochloric acid so all of it gets reacted with if only half of it would cause anomalous results to occur. From these pre-tests I have found out that using the collecting method is more convenient for this experiment. AIM In this investigation I am trying to find out how the surface area of magnesium (a metal) effects the rate of reaction with hydrochloric acid (a acid) the way that I am going to test this I am going to time how long it takes 40cm3 of hydrogen a gas to be collected in a measuring cylinder and then I will work out the rate of reaction (1/time) I am going to show the results on a graph. PLAN / METHOD * Fill a trough about half way up with water making sure that the beehive shelf you will be using will be under the water. * Place the beehive shelf in the water. * Fill a measuring cylinder that holds 40cm3 with water full to the top making sure that there are no air bubbles inside it. * Hold the top with your hand making sure that none of the water falls out. * Turn it upside down and place it over the top hole on the beehive shelf still making sure that there are no air bubbles, if there are air bubbles refill it and do it again. * Get a conical flask with a bung connected to a delivery tube and another smaller tube that will be connected to the syringe. * Place the delivery tube inside the side hole of the beehive shelf. ...read more.


A reaction will only occur if the particles in the gas or liquid collide with the particles in the solid. Increasing the surface area of the solid increases the chances of collision taking place. From the prediction that I made I can say that it matches my analysis. EVALUATION I can say that both of my graphs show consistent results and are accurate, there are no anomalous results except for one which is in the rate of reaction graph, 2 of the same surface area have the same rate of reaction, they are (5/4) and (5/8) and they both have the rate of reaction, which is 0.06. I think that to make the results more accurate I could have had the rate of reaction to 3 decimal places to have more precise answers or I could have had my rate of reaction results in standard index form, which would make the numbers shorter and readable. If I would do this experiment again I think that the thing that I would change is the way I varied the surface area. Instead of cutting up the strips I could have used different forms of magnesium e.g. big lumps, small lumps, smaller lumps, smallest lumps and than powder all weighing the mass 2g this would make the range between the result much more different and clearer on the two graphs. The bad thing about the way I set up my experiment is that as there was no beehive shelf available so I had to hold the measuring cylinder this caused some of the hydrogen gas bubbles to come out of the side of the cylinder. Another reason was, while I was holding the measuring cylinder it wasn't to at straight level as there was no beehive shelf so I had to read the numbers carefully until 40cm3 of hydrogen had been collected. Overall I think that my investigation did go well as my results did match my prediction and also I found out the answer to the aim of the investigation. PLANNING Jashoda Patel 10T ...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. Marked by a teacher

    Investigation of the rate of reaction between Magnesium and Hydrochloric acid

    4 star(s)

    26 7 120 31 30 38 26 29 5 150 33 30 38 29 31 4 180 34 33 39 30 32 4 210 35 34 40 30 33 5 240 35 36 40 30 35 10 Hydrochloric acid (50 ml)

  2. Marked by a teacher

    How dose temperature affect the rate of reaction between magnesium and hydrochloric acid.

    3 star(s)

    Their is nothing we could have done to change this reaction so that it would not give out heat. The only thing that we were able to change was the amount of energy that the reaction gives out. The less energy given out the better, this would mean that the

  1. Marked by a teacher

    For my experiment I am finding out the effects on the reaction rate when ...

    3 star(s)

    > A trough of water- a bowl filled halfway with tap water under the burette filled with water, so that the displaced water can be collected in the bowl. The bowl of water also prevents the water from the burette escaping when I have to lift it to feed in the delivery tube.

  2. Determine the rate equation for the reaction of hydrochloric acid with magnesium metal, and ...

    I carried out a preliminary test to measure how large the temperature increase would be. I found that when carrying out the reaction at room temperature, there was no measurable change in temperature from 23�C using the method described below.

  1. How does changing the concentration of the Hydrochloric acid affect it reactions with Magnesium?

    After my preliminary experiments I discovered that if I used 50cm3 of hydrochloric acid with 3 cm of magnesium ribbon then I could obtain some good results. As these results produced a reasonable volume of gas in a reasonable time these were the quantities of chemicals that I used.

  2. Investigating the Effect of Different Concentration Of Acid Rain On The Rate Of Reaction ...

    down on this, a lot of care will be taken throughout the investigation, and the experiment will not be done when I am tired (I will try and do it all in one go). * Accuracy Of The Weighing Balance.

  1. To find out what factors affect the rate of reaction between magnesium and hydrochloric ...

    Concentration ( or pressure)= If a solution is more concentrated then it means that there are more particles in a smaller area. Because of this lack of space the particles will collide more often, increasing the rate of reaction.

  2. An Investigation: Factors That Affect The Rate Of Reaction between Calcium carbonate and Hydrochloric ...

    This is because it may affect the results, and if the acid spills, it could be expensive to replace a new one and same goes with the gas syringe. The reason we used a stand clamp is because the equipment were held steadily to increase the gas flow through the tubing.

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