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Gcse Chemistry Coursework Rates Of Reaction Evaluation

GCSE CHEMISTRY RATES OF REACTION COURSEWORK ... GCSE CHEMISTRY RATES OF REACTION COURSEWORK ...
Anjelina Qureshi Mrs Gravell Rates of Reaction Coursework Chemistry Year 11 Rates ..... Evaluation My standard deviation sheet is attached at the back of this ...

Gcse Chemistry Coursework Rates Of Reaction Evaluation

Between magnesium and hydrochloric acid the rate of reaction increases as you increase the surface area of the magnesium. Variables the variables available to investigate are mass of magnesium used temperature of surroundings time of reaction taking place pressure (atmospheric) volume of hcl used volume of h2 produced concentration of hcl shakingstirring surface area of magnesium turnings or ribbon magnesium a dependent variable is a factor which changes due to another variable changing. However, they will cool a little standing out in the laboratory, so not completely satisfactory solution to the problem.

Some of the work done here in presenting the results, e. I have circled it to show that that results isnt accurate as it doesnt follow the general trend. Your coursework write-up must expressed in your teacher will have a good idea what to expect and you must be able to justify all your write-up.

All experiments should be repeated where time allows to check for accuracy and consistency, this may become more necessary after you have done a preliminary analysis the bung effect! - look up about dead volumes and its correction when dealing with gas volumes! Your recorded results should indicate the accuracy of the measuring equipment e. This would give me an idea about what other factors affect the rate of reaction and in what way. What further experiments, using the same method or another method, could be done to support your prediction or conclusion? In other words give some detailed ideas on further work that would provide additional relevant evidence.

Internet, and of course your class work and exercise books and mention your research sources in your coursework report and quote your research sources  and any previous rates experiences any previous rates of reaction experience is invaluable and can be usedquoted in your write-up - particularly knowledge of experimental methods which can count as preliminary work. Change in mass - a reaction which produces a gas will lose mass and this can be shown by carrying out the reaction on a balance. In other words how suitable was the method overall? Do think the results are reliable bearing in mind any anomalies? For the hydrochloric acid - sodium thiosulphate reaction think about the precipitate, observing it etc.

If you have to change anything, describe and explain the changes you have made to the procedure (some of this might count as valuable marks for the evaluation skill) skill o obtaining evidence - observations, measurements, in other words the results! (possibly some data you might have been given) you can produce a summary table with the averagecorrected (if necessary)  gas volumes v time for all the different acid concentrations or whatever variable for the hydrochloric acid - sodium thiosulphate reaction you are recording just the reaction time for different thiosulphate or acid concentrations or temperatures, so the data gathering and subsequent processing is simpler. On the , although the calculation is above gcse level, the ideas on sources of errors are legitimate for gcse level. Your write-up must be your work produced from your study and your experiments.

I could use a different metal to see if the reactivity of the metal affects the reaction, i could use a different acid, a smaller or larger mass, a smaller or larger volume of reactants to increase or decrease the rate of reaction. Exam revision summaries and references to science course specifications are unofficial. Your teacher will have a good idea what to expect and you must be able to justify all your write-up , neither do i replace your teacher supervisor! However i sometimes get really interesting questions and learn something new myself - and thats always a pleasure! A brainstorm outline of a whole investigation is outlined below, it is not meant to be prescriptive, but can form the basis of aiming for a high mark and hopefully give you plenty of ideas. This variable is an independent variable and it is the variable that is changing. Experiment 2 temp in lab (c) concentration of hcl (moldm) mass of mg (g) these include using a measuring gas syringe and using another person as well as some one to start the timer to replace the bung quicker so no gas is lost.


gcse controlled assessment chemistry Rates of Reaction ...


Ideas for coursework assignments or projects involving the rates or speed of chemical reactions on the Factors Affecting the Rates of Chemicals which also has ...

Gcse Chemistry Coursework Rates Of Reaction Evaluation

Introduction My investigation is about the rate of reaction. A rate of ...
The reaction of the experiment happens with this formula: .... proves the collision theory, it says that increased surface area increases rate of reaction. Evaluation:.
Gcse Chemistry Coursework Rates Of Reaction Evaluation Neutralisation, If acid is spilt on hands, run hand under a tap with cold running water immediately, and then seek medical aid or advice. Experiment 2 temp in lab (c) concentration of hcl (moldm) mass of mg (g) these include using a measuring gas syringe and using another person as well as some one to start the timer to replace the bung quicker so no gas is lost. The experiment was quite reliable due to the method i used and the apparatus i used. Required practicals summary, 5. Hydrochloric acid - volume of hydrogen produced in cm3 1st 2nd 3rd average 5. Evaluation:. I also predict that the graph of volume of gas produced against concentration and rate of reaction against concentration will be a straight line because the gas produced is proportional to the concentration. The chemical equation of the reaction i am investigating is mg (s) 2hcl (aq) -- mgcl2 (aq) h2 (g) rate of reaction rate of reaction gas produced time taken to measure the rate of reaction i can use three ways precipitation - this is when the reactions product is a precipitate which clouds the solution. Your task is to plan . Using a gas syringe will increase the accuracy of the results because it is graduated more than a measuring cylinder and the graduations can be seen clearer than on a measuring cylinder because there is no meniscus of the water to affect the level. From this graph re-discuss your findings in a more mathematical way and relate this to the particle collision theory of reactions! Its all about chance!  And explain whywhy not the results support your prediction.
  • BBC Bitesize - GCSE Chemistry (Single Science) - Sample exam ...


    The graph shows that the mass loss for a reaction with concentration 2. Refer to any previous laboratory experience with rate of reaction experiments which may have helped you decide and design the experimental method. From this graph re-discuss your findings in a more mathematical way and relate this to the particle collision theory of reactions! Its all about chance!  And explain whywhy not the results support your prediction. The particles are more exposed within the acid when the surface area is greater. Quote directly - with reference to your graph(s) discuss possible sources of error which might lead to inconsistent results i.

    What further experiments, using the same method or another method, could be done to support your prediction or conclusion? In other words give some detailed ideas on further work that would provide additional relevant evidence. . If temperature isnt a variable, it must be kept constant. I could also add the element of temperature into the investigation i could submerge the apparatus and the reactants in a water bath set at a certain temperature, leave them for a while to become the desired temperature and then perform the experiment. Your coursework write-up must expressed in your teacher will have a good idea what to expect and you must be able to justify all your write-up.

    Sign up to view the whole essay and download the pdf for anytime access on your computer, tablet or smartphone. In the case of the sodium thiosulphate - acid reaction, you can leave the thermometer in the flask and take the temperature at the end, then use an average for the temperature of the reaction. The chemical equation of the reaction i am investigating is mg (s) 2hcl (aq) -- mgcl2 (aq) h2 (g) rate of reaction rate of reaction gas produced time taken to measure the rate of reaction i can use three ways precipitation - this is when the reactions product is a precipitate which clouds the solution. Surface area- increasing the surface area of the magnesium will expose more particles to the acid therefore reducing the time it takes for the reaction to finish as it has a larger surface to attack. Use smooth best curves for as many of the points as possible, though some parts of the graph might be linear, watch out for the scatter - the experiment is not that easy to get good results. Word process your work if you can and your results can be tabulated and processed into graphs using software packages like excel usually involves doing a few trial runs of the experiment to see how it goes and making modifications if necessary. The simplest solution here, is to make sure all the chemicals have been standing in the laboratory prior to the lesson. More marks are lost by not writing things down, than by not doing experiments! Your write-up must be your work produced from your study and your experiments. A analysing and considering the evidence - what do the results mean in terms of your prediction and theory! The results are initially processed into graphical form (graphing) for several reasons for both the analysis and evaluating the experimental . Does the trend of all the graph lines support youre your prediction, are all the results consistent with your prediction and theory? And more advanced graphical analysis of the limestone results.

    ... for your exams with this BBC Bitesize GCSE Chemistry rates of reaction and energy ... evaluate - you must review information, including identifying strengths and ... of reaction in Experiment 2 is faster than the rate of reaction in Experiment 1.

    BBC Bitesize - GCSE Chemistry (Single Science) - Rate of reaction ...

    ... and revise rate of reaction with this BBC Bitesize GCSE Chemistry (Eduqas) ... this experiment to investigate the effect of temperature on the rate of the reaction. ... Evaluate the hazards and the precautions needed to reduce the risk of harm.
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    Results experiment 1 temp in lab (c) concentration of hcl (moldm) mass of mg (g) volume of hcl (cm) time (s) volume of h2 collected (cm) before expt. If you are confident and chosen the variable you want to investigate you should try to make a prediction and maybe justify it with some theory if you can. The system consists of a light beam emitter and sensor connected to computer and the reaction vessel is placed between the emitter and sensor. More collisions increase the rate of reaction and all methods of increasing the rate of reaction can be explained in terms of the increase of the number collisions between the particles of the reagents. The graph shows that the mass loss for a reaction with concentration 2 Buy now Gcse Chemistry Coursework Rates Of Reaction Evaluation

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    The light reading falls as the sulphur precipitate forms. For sources and references you should research rates of reaction for theory, experimental methods etc. Created by teachers, our study guides highlight the really important stuff you need to know. Between magnesium and hydrochloric acid the rate of reaction increases as you increase the surface area of the magnesium. But its up to you ) corrected gas volumes on the y axis and time on the x axis - what should the origin be? ( for the hydrochloric acid - sodium thiosulphate reaction you can plot either (i) reaction time, or (ii) 1time versus a concentration or temperature (1time relative rate of reaction).

    Word process your work if you can and your results can be tabulated and processed into graphs using software packages like excel usually involves doing a few trial runs of the experiment to see how it goes and making modifications if necessary Gcse Chemistry Coursework Rates Of Reaction Evaluation Buy now

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    This page should help with rates of reaction coursework projects or assignments investigations detailed gcse revision notes on the factors affecting the rates of chemicals  which also has brief descriptions of experimental methods and equations, particle pictures and fully explains all the factors affecting the rate of a chemical reaction advanced level chemistry theory pages on chemical kinetics advanced level theory pages on kinetics for gce-as-a2-ibus gr 11-12) all website content dr phil brown 2000 onwards. When you have decided on the method, give a detailed description of how you might carry it out. Is there any other factor for the reaction you are studying?, will any of the reactants or products be affected by change in temperature or pressure? H , is the active ingredient that actually attacks the metal or carbonate, and acids can ionise to different extents, (2) 1 molar or 1 mol dm if you have decided, for example, to investigate the effect of acid concentration on the speed of a reaction, then everything else should be kept constant for a fair test, and this should be obvious in your plan for the reasons discussed above! If you havent already chosen the variable, do so now, and make a prediction and justify it with some theory which you may have previously described and should refer to Buy Gcse Chemistry Coursework Rates Of Reaction Evaluation at a discount

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    So what we are after is the main trend(s) or pattern(s) describing with reference to the graphs. Volume of gas produced in cm3 time (sec) 1st test 2nd test 3rd test 4th test average range 0 the aim of this investigation is to investigate the rate of reaction of magnesium. The simplest solution here, is to make sure all the chemicals have been standing in the laboratory prior to the lesson. What further experiments, using the same method or another method, could be done to support your prediction or conclusion? In other words give some detailed ideas on further work that would provide additional relevant evidence. Investigation of the rate of reaction between magnesium and hydrochloric acid table 3 - showing the volume of gas produced by a reaction between calcium carbonate and a 0 Buy Online Gcse Chemistry Coursework Rates Of Reaction Evaluation

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    The chemical equation of the reaction i am investigating is mg (s) 2hcl (aq) -- mgcl2 (aq) h2 (g) rate of reaction rate of reaction gas produced time taken to measure the rate of reaction i can use three ways precipitation - this is when the reactions product is a precipitate which clouds the solution. Change in mass - a reaction which produces a gas will lose mass and this can be shown by carrying out the reaction on a balance. I could also add the element of temperature into the investigation i could submerge the apparatus and the reactants in a water bath set at a certain temperature, leave them for a while to become the desired temperature and then perform the experiment. A clearly labelled diagram of the method with a brief outline of how you intend to carry out the experiments - this  cuts down on the writing and makes the scene clear! You must give details of  how long you might time the experiment as well as the time interval between experimental readings remember you can change your recipe or way of doing the experiment Buy Gcse Chemistry Coursework Rates Of Reaction Evaluation Online at a discount

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    The experiment was quite reliable due to the method i used and the apparatus i used. When you have decided on the method, give a detailed description of how you might carry it out. But its up to you ) corrected gas volumes on the y axis and time on the x axis - what should the origin be? ( for the hydrochloric acid - sodium thiosulphate reaction you can plot either (i) reaction time, or (ii) 1time versus a concentration or temperature (1time relative rate of reaction). I could extend my experiment by for example reading the amount of gas produced at intervals during the reaction is occurring and hence see how the rate of reaction changes from the start to the finish of the reaction. It is best, if possible,  to have all the average results points plotted on the same graph for easy comparison - take care because this may involve 4 or 5 lines for 4 or 5 different acid concentrations make sure you use a clear key for the different line points and a clear title for the graph and clearly label the axis including the units  or whatever Gcse Chemistry Coursework Rates Of Reaction Evaluation For Sale

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    Rate of reaction is a change in mass or volume or concentration per unit of time. If you are varying temperature, you need to heat up the reactant solutions separately and take their temperatures, mix, start stopwatch. When you have decided on the method, give a detailed description of how you might carry it out. Results experiment 1 temp in lab (c) concentration of hcl (moldm) mass of mg (g) volume of hcl (cm) time (s) volume of h2 collected (cm) before expt. Between magnesium and hydrochloric acid the rate of reaction increases as you increase the surface area of the magnesium.

    Then, they will all be at the same temperature, which should be recorded. Created by teachers, our study guides highlight the really important stuff you need to know For Sale Gcse Chemistry Coursework Rates Of Reaction Evaluation

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    If you have to change anything, describe and explain the changes you have made to the procedure (some of this might count as valuable marks for the evaluation skill) skill o obtaining evidence - observations, measurements, in other words the results! (possibly some data you might have been given) you can produce a summary table with the averagecorrected (if necessary)  gas volumes v time for all the different acid concentrations or whatever variable for the hydrochloric acid - sodium thiosulphate reaction you are recording just the reaction time for different thiosulphate or acid concentrations or temperatures, so the data gathering and subsequent processing is simpler. Rate of reaction depends on four separate things temperature, concentration (or pressure for gases), size of particles (or surface area for liquids) and the presence of a catalyst Sale Gcse Chemistry Coursework Rates Of Reaction Evaluation

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