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

Coursework Rates of reaction

Extracts from this document...


IGCSE COURSEWORK COORDINATED SCIENCE Name: Gabriel Tudela Teacher: Date: April 06, 2009 TITLE: Factors affecting the rate of reaction: Investigating the effect of concentration on the rate of reaction Skill(s) assessed: Topic C10 [Experiment 9 (in S4)] Investigating the factors affecting the rate of reaction IGCSE Coursework Skills C2, C3, & C4 Some of the factors affecting the rate of a reaction that you have studied are: * Temperature * Concentration * Surface area Aim: Investigating the effect of changing the concentration on the reaction between calcium carbonate and hydrochloric acid, by collecting the carbon dioxide gas given off. CaCO3(s) + 2HCl(aq) --> CaCl2(aq) + H2O(l) + CO2(g) Hypothesis: My hypothesis is that as we increase the concentration of the HCl, the rate of the reaction will be faster; this is because more collisions will be present Materials: - Small calcium carbonate chips - Dilute hydrochloric acid (1 moldm-3) ...read more.


At the same time as you place the cork, start timing how much it takes to get 50cm3 of gas 10. Repeat this experiment using different concentrations of HCl acid by diluting the acid with distilled water, to make it a fair test use always the same amount of chips and always reach 25cm3 in the measuring cylinder so that only concentration and not amount will affect the rate of reaction 11. Record your results in a neat and tidy table Results: Table: Volume of 1.0 mol dm^-3 HCl (cm^3) Volume of H2O (cm^3) Concentration of HCl (mol dm^-3) Time (s) to reach 50ml Time to reach 100ml 5 20 0.2 38 133 10 15 0.4 17 35 15 10 0.6 9 18 20 5 0.8 7 13 25 0 1 5 10 Graph: Anomalous Results: In this experiment we were lucky to find no anomalous results at all, everything went on as we planned it was going to go like. ...read more.


At this last 2 differences, at the change from 0.6 to 0.8, and 0.8 to 1 in mol dm^-3 of concentration of HCl, the difference was in both only of 2s, showing off that if the acid was yet too concentrated, and almost getting to being fully concentrated, the difference in time to reach the 50ml will become smaller and smaller. Evaluation/Improvement: The experiment was carried out really well, there was no significant anomalous result which indicated that we were doing the right thing, the experiment fulfilled our hypothesis decision, it went on as we planned it would. We should have repeated the experiment, repeating the experiment would have given us much more accurate results, and we have used the same balance for each measuring of calcium carbonate, so that we make it a fair test. Markham College IGCSE SCIENCE Chemistry Coursework ...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

This report briefly touches on all the main elements necessary. However it lacks depth and detail. In order to be successful more data should be collected and evaluated. Specific strengths and improvements have been suggested throughout.

Marked by teacher Cornelia Bruce 17/04/2013

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)

    90 - 100 - 110 - 120 - 130 - 140 - 150 - 160 - 170 - 180 - From these results we can see that the reaction takes place quickly, within 50 seconds. We were unable to record any further results as the measuring cylinder we used was too small and so filled with the gas quickly.


    Triglycerides The first step of fat absorption is hydrolysation of long-chain triglycerids, and thereafter emulsification by bile salts into micells and liquid cristals. These particles diffuse into the enterocytes, where they are resynthesised into triglycerides. The triglycerides are packed into chylomicrons and transported via the lymph.

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

    against time (s) clearly show that as time goes on, there is more mass loss. This occurs because in more time, more collisions between H202 particles and Mn02 (catalyst) particles can occur, meaning more decomposition and more mass loss occurring.

  2. Effect Of Substrate Concentration On The Activity Of Catalase

    When cutting out the piece of potato, it must be ensured that the potato is resting on the tile before it is cut. The methodology explains how it will be cut. The blade which will be used to cut the potato, is also another hazard.

  1. Disappearing cross (aka Rate of reaction).

    are both at the same concentration. I will also make sure that no catalyst used that could speed up the reaction in any of the experiments to make sure that the test is fair and my results are reliable. Theory This experiment is based around the collision theory.

  2. The Effect of Catalase in the Breakdown of Hydrogen Peroxide

    2 47.8 0.9 47.9 0.6 47.9 0.8 4 45.5 3.2 45.2 3.3 45.4 3.3 6 45.3 3.4 44.6 3.9 45 3.7 8 44.8 3.9 43.9 4.6 44.4 4.3 10 44.5 4.2 43.1 5.4 44 4.8 Average Amount: 42.9 2.8 Percentage of Catalase: 30% 1st Attempt 2nd Attempt Time: Initial Reading

  1. An investigation into the effect of concentration on the rate of reaction. The disappearing ...

    could influence the results, such as that measuring a bit too much of the solutions would increase the rate of reaction and give slight anomalies - this is what seems to have happened on three occasions, as illustrated on my graph.

  2. How does the concentration of HCl affect the rate of reaction with CaCO3?

    fit the line of best fit perfectly, making our results very accurate. Method List of apparatus: * Stop watch * Bowl * Pipette * 0-10ml measuring cylinder * Burette * Buckler flask with an attached delivery tube * Weighing boats * Spatula * Scale * Clamp * Thermometer Method 1.

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