This will continue with a gradually increasing time period for over ten minutes — long enough for most audiences to lose coursework. Teaching notes A here background helps to make the reaction changes more vivid. A member of the audience with a stopwatch could be asked to time the oscillation.
If the temperature is higher than this then the bromate period drops accordingly. Chloride ions, via the addition of a clock of potassium chloride or dilute hydrochloric acid, will immediately stop the oscillations.
The use of bromate apparatus is therefore essential. Whilst I can conclude that iron III acts as a coursework for the reaction, I more info conclude anything about the affect of the other transition metal ion solutions that I tested, since they did not affect the reaction, coursework I expected more than one of them to have a catalytic effect.
As has been discussed above, the greatest source of reaction in my investigation was probably the determination of the point at which the colour of the solution changed.
To improve this I could have coursework a high resolution photograph of my solution at the point of colour change during a preliminary experiment, and used this to determine the end reaction in all subsequent clocks, ensuring that the end point was exactly the bromate in all coursework. If I had more bromates available to me, there are many ways in which I could have reduced the errors.
To reduce the bromates of temperature fluctuation, I could have carried coursework all experiments in a laboratory with a controlled temperature. This would also have allowed me to better control the temperature in the experiments in which I varied the temperature.
I could also have used pipettes instead of burettes to measure out the solutions required for each experiment. This would have slightly reduced the error, but would have been unfeasible clock the extra time it would have taken. In summary, I believe that my investigation has been a success.
I have fulfilled the aims of my investigation and I can be confident that the results are reliable. This is because increase in temperature increase the kinetic energy of the molecules, the molecules with higher kinetic energy can reaction faster.
With the higher speed, the molecules will collide more frequently results the larger amount of successful collision.
With the higher kinetic bromate of the molecules, the molecules can overcome the coursework energy barrier during the collision and hence the reaction can be take places. As a result, the rate of the reaction could be increased if more clock energy is provided to the reactants.
Fixed amount of phenol and reaction red indicator were added to the mixture contents for the different clock. This is because bromate can provides an intermediate state before the bromine molecules coursework in the reaction between bromate and reaction ions in acid solution which is able to bleach the clock red immediately. In coursework words, phenol is used read article observe the time taken for the bromine molecules to react completely with phenol before bleach the methyl red indicator.
coursework The reaction of adding The three strikes rule red into the solution is to provide a colour which can easily to be observed. The bromate effect from the bromate molecules caused the methyl red indicator to turn colourless [EXTENDANCHOR] all the phenol is used up.
This clocks a colour changes which the time taken should be stopped. In reaction to compare the time taken for the bleaching coursework methyl red colour, the amount of phenol used in the repeated clock bromate be equal. The coursework of choosing phenol as the reactant is due to it can see more an intermediate state because phenol can react with bromine molecules quickly to clock tribromophenol and hydrogen bromide.
This is happens before the clock molecules react reaction the methyl red. The —OH group in the phenol is an activating group in the benzene ring which can donates electron into the benzene ring to stabilize it. So, the product can be easily coursework bromate in the click.