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

Science Coursework Investigation ions

Extracts from this document...

Introduction

Section 1 - PLANNING Write a detailed plan of your experiment. Make sure it is a fair test. Draw a diagram of apparatus if you like. Predict what will happen and say why, using scientific background material, which might include information from books, CD-ROMs or the Web. Mark scheme: For 2 marks: Plan a simple, safe experiment. For 4 marks: Plan a fair test, choose equipment, and make a prediction. For 6 marks: Use scientific knowledge to plan, decide what to control and vary. Make a prediction. Decide on a suitable number of measurements. For 8 marks: Use scientific knowledge to plan, trying to be precise and reliable. Make a prediction and justify it. Use information from other sources. List of Equipment: Measuring cylinder Boiling tube Trough Delivery tube Goggles Spatula Gloves (if possible) Boiling tube rack Digital weight measurer To make this experiment a fair test I will have to keep the following factors the same: Same size boiling tubes. Volume of Acid Period of time Amount of metals. Temperature Starting temperature of the acid Surface area of the metals Safety Safety precautions are needed because I am dealing with reactive metals, which can injury. The following things need to be acknowledged to, in order to keep this experiment safe: � Be careful not to knock over the rack with the boiling tubes in � Be careful not ...read more.

Middle

I also predict that Copper will not react with any metal. I know this because copper is lower down in the reactivity series. Info sources * Encarta Encyclopedia * Britannica Encyclopedia * Revision guide * Nottingham bluecoat school website Section 2 - OBTAINING EVIDENCE Carry out the experiment. Put your results in a properly labeled table. Repeating experiments gives you more marks. Take averages (means) where this is appropriate. Mark scheme: For 4 marks: Make enough measurements and record them. For 6 marks: Make accurate observations, repeat them and record them clearly. For 8 marks: Use equipment with precision. Record a sensible number of reliable measurements. Metals Time (min) Hydrogen Produced (cm3) Test 1 Test 2 Test 3 1 1 0 2 2 2 1 5 3 2.5 2 7 4 3 3 9 (Zn) 5 4 4 10 1 1 2 7 2 2.5 4 10 3 3 5 12 4 5 7 14 (Fe) 5 5.5 8.5 18 1 6.1 5.2 6 2 9.3 8.6 6.3 3 11 10.1 6.7 4 Out of time 10.5 6.9 (Mg) 5 Out of time 10.8 7 1 0 0 0 2 0 0 0 3 0 0 0 4 0 0 0 (Cu) 5 1 0 0 In obtaining evidence accuracy is everything and to this the following step were taken: Set balance to zero, (use the Tare or T button) ...read more.

Conclusion

Temperature of the acid If the starting temperature of the acid is different each time the speed at which the acid particles collide with the metals will increase more the higher the temperature goes. This means the acid particles move with more energy, which means they will collide with the magnesium with more energy, which will give more successful collisions per second. Surface area of the metals If the metals had a bigger surface area each time the experiment was done, then the acid particles will have a bigger area to collide with, so more collisions will occur every second and the more collisions per second than the more successful collisions per second. Type of acid used If you changed the type of acid then the rate of reaction would change. Hydrochloric, Sulphuric and Nitric acid all would produce a different rate of reaction, so if I do change the type of acid then all three kinds would produce a different set of results. Key factor The factor that I would most like to improve on is the concentration of the acid. I choose this because several different concentrations can be made up before the experiment and they will able me to be more accurate. There will be several different concentrations of acid, which will give me a wide range of results, which will be reliable and reproducible. Ahmad Khan (10F) ...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 Aqueous 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 GCSE Aqueous Chemistry essays

  1. Marked by a teacher

    chemistry coursework

    4 star(s)

    the more particles of reactant there are knocking about between the water molecules which make collisions between more important particles more likely. The less concentrated the solution, the fewer reactant particles are colliding between water molecules which makes the collisions between the important particles less likely.

  2. How much Iron (II) in 100 grams of Spinach Oleracea?

    present in 100 grams of Spinach. This is not the expected result of 4 mg's, which is what the many textbooks suggest the answer should be, however it is again closer to this expected result. This could be due to the smaller volume of spinach extract solution that was used in the titration.

  1. metal extraction and reactivity

    * Si is then added and the mixture is heated in the absence of air. * The FeO is converted into FeSiO3 and run off * The Cu2S is then reduced reduced to Cu by heating in a controlled amount of air.

  2. DECOMPOSITON OF HYDROGEN PEROXIDE WITH HEAVY METAL CATALYSTS

    Analysis: It can be seen that there is a pattern in the results and this pattern indicates that as the reaction starts more and more gas is produced but as it continues the reaction begins to slow down and not as much gas is produced as the volume of reactants is decreasing.

  1. construction science and materials

    Fertilization can increase the growth rate and amount of plant material, thus possibly increasing the number of wildlife that can inhabit a site. Invasive species control maintains an area's structure and native composition. But management can also harm the ecosystem; for example, machinery used in a timber harvest can compact

  2. Neutralisation Coursework

    If itching does occur go immediately to the science lad technician for advice. 7. Make sure clamp is not too tight as the burette could be under too much pressure and break. This is especially important as the burette is made out of glass.

  1. Investigate 'How much gas is released when a metal reacts with an acid.'

    I will cover the top with cling film and clamp it upside down so that the bottom of it is just in the ice cream tub, which is also full with water. I will place the ice cream tub on the base of the clamp so that it is stable,

  2. See how different concentrations of Hydrochloric acid change the rate of reaction with a ...

    � Temperature of the acid If the starting temperature of the acid is different each time the speed at which the acid particles collide with the magnesium ribbon will increase as the temperature increases. This means the acid particles move with more energy so they will collide with the magnesium

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