• 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

Lab report rates of reaction

Extracts from this document...


LAB WRITE UP Research Question: Can the differentiation in the size of reactants such as marble chips affect rate of reaction? Can the three different solutions ( Hydrochloric acid, Nitric Acid and Sulphuric Acid) help support the conclusions being drawn up from the testing? Variables: Controlled Variables: 1. We should keep the same amount of calcium carbonate when re-doing a trial. 2. The same reduction in the sizes of the marble chips should be constant. For example we are starting with the biggest marble chips of area 12cm^2, then we are going to move down to a medium marble chip size of area 8cm^2 and then finally to a chip size of area 4cm^2. This should be constant. 3. The time given to check the reaction should be constant. (3 Mins ). Since we are taking a RATE, it is going to be Variable / Time. The time needs to be constant. 4. The volume of the solutions used should be kept constant at 50ml 5. The acids should also be of the same mole. 0.5 mole. If this is obstructed then concentration will play its part in the rate of reaction. ...read more.


Therefore what we did was put in the type of marble chips into the flask to start the reaction and then block it with the cork that has the tube attached to it that will take the CO2 into the measuring cylinder. 7. After that we wait for exactly three minutes and take the tube out of the measuring cylinder so that it doesn't transfer any more CO2 into the measuring cylinder for then it will not be a fair test. After we stopped the experiment we take down/record the amount of CO2 on the table's we created. Data Collection: Solution: Hydrochloric Acid (0.5 moles) Material: CaCO3 Measuring: Amount of CO2m Time: 3 minutes Surface Area of marble chips Amount Of CO2 (ml) T2 Amount Of CO2 (ml) T3 Amount Of CO2 (ml)T3 Amount Of CO2 Average 12cm^2 15 ml of CO2 16 ml of CO2 15 ml of CO2 15.333 ml 8cm^2 23 ml of CO2 24ml of CO2 24ml of CO2 23.667ml 4cm^ 59 ml of CO2 60 ml of CO2 60 ml of CO2 59.7 ml Average = sum of numbers/Number of Numbers. Average for the first testing (12cm^2) ...read more.


Using more trials will help give specificity to our Data Analysis. For example we only have 3 points in the graph for each line. If we had for example 5 or 6 tested variables this will help strengthen the proposition of the graph. 2. We did not test a wide variety of acids. As we know the acids react differently. If we tested, for example 8 acids we can make a more general statement. We never know if it is only these specific acids this size theory works for, always, testing more variables will help make a better general statement. 3. Other factors that affect the rates of reaction might have biased the data analysis a bit. For example the temperature of the marble chips or the acids used might have differed and since temperature affects the rate of reaction, the data might have been corrupted. Since we are checking for the rates of reaction this issue is a really huge problem that can lead to huge inaccuracies, but that is only if the temperatures differed by a lot. I mentioned this in my controlled data section. The major thing is that we cannot make the temperature within the marbles the same. Since marbles are heat convectors it is really hard to keep temperature in this experiment constant. ?? ?? ?? ?? Ali Abdulrahman ...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

Here's what a teacher thought of this essay

3 star(s)

This report is generally well written. The main limitation to its effectiveness is the lack of scientific detail. There are specific strengths and improvements suggested throughout.

Marked by teacher Cornelia Bruce 18/04/2013

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

    Marble Chips and Hydrochloric Acid.

    4 star(s)

    In it, I have used the average of the two sets of results. The pattern I can see is that when the reaction first starts, the reaction is fastest, from then on, the reaction slows. We can see this because the gradient of the curve is steepest at the beginning.

  2. The effects of caffeine on reaction time

    320 245 18 420 309 111 19 405 190 215 20 350 231 119 Calculations: Difference in reaction time= x Average= y Mean difference= d Standard deviation= s The Z test value= Z = dVn s Z = 126.65 X V20 56.73 = 9.98 10 test value =2 For a

  1. Measuring the Rate of Reaction between Hydrochloric Acid and Calcium Carbonate

    three conical flasks a 50cm� measuring cylinder to measure out the acid, and scales to measure the calcium carbonate small chips. Time in seconds Volume of Carbon Dioxide In cm� 1st time 2nd time 3rd time Average 0 0 0 0 0 10 23 17 13 18 20 45 20

  2. The rate of reaction between Nitric acid and marble chips.

    This would thus cause an increase in the rate of reaction. In Graph 2, as you increase the temperature the rate decreases. Plan Firstly, I plan to set out the experiment as shown in the diagram below. I will then be doing three runs for five different temperatures.

  1. Factors Affecting the Rate of Catalytic Decomposition of Hydrogen Peroxide.

    rate of reactions could be because as the concentration increases, so does the extent to which the reaction is exothermic. When this heat is produced, it acts as a variable, and more is produced the more vigorous the reaction - i.e.

  2. To investigate the effect of the concentration of nitric acid on the rate of ...

    Repeat steps 1-8 for five the different concentrations of nitric acid (2 molar, 1.6 molar, 1.2 molar, 0.8 molar and 0.4 molar). (See conversion table) N.B.: At least people should be involved in conducting the experiment to make the process a little easier resulting in better, more accurate and more reliable results (which is what I did).

  1. Investigating the reaction between Marble Chips and Hydrochloric Acid.

    I predict that in the later stages of the timed reaction, the rate will slow down. I was able to make these predictions due to my background knowledge on how the variable of concentration of an acid affects the rate of a reaction (the more concentrated the acid is, the quicker the reaction).

  2. Effect Of Substrate Concentration On The Activity Of Catalase

    Hydrogen peroxide is an oxidising agent, as oxygen will be given off during the reaction. This implies that it could help the burning of fires. Due to this, reasonable care must be taken to ensure that the oxygen is not directly exposed to the flame of the Bunsen burner while water is being heated.

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