Rate of reaction coursework evaluation

Also, it has a narrow top and so it is safer. My conclusion is justifiable because I have backed it up with points from my data and I have proved all the points that I made. The particle theory says that for a chemical reaction to occur, there must be a collision at a certain velocity and at a certain angle.

The timer was stopped when in see the black cross through the cloudy solution could no longer. It is shown on my graph.

rate of reaction concentration experiment

I could test this by asking one of my peers to follow the instructions and then asking for their feedback. I had to make sure that my classmates were safe as well as myself. This is very important because loose hair can not only get dipped into chemicals but can also obscure vision.

I will discuss these further in my evaluation. When you have decided on the method, give a detailed description of how you might carry it out. This shows that there is a difference in the data which proves accuracy. My data was precise because most of the points on my graphs are close to the line and are all close by each other. 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 rate of reaction is the speed of a reaction. The state symbol for sulphur dioxide is aq not g because it is dissolved in water as its original state would be too toxic and corrosive for me to use safely. It is quite difficult to judge properly the exact moment that the cross disappears - the human eye is just not strong enough.

This causes them to move around more. 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!

Rate of reaction practical

Using white paper helped the marking to stand out. Sodium thiosulphate is a colourless, crystal like compound and is used for dyes and is also a salt. Graphs All of the graphs that I drew for this investigation show a negative correlation. I also made sure that the measuring cylinder was on a level surface so that I could clearly see how much liquid I was putting in to it. Is there any other factor for the reaction you are studying? This is very important because loose hair can not only get dipped into chemicals but can also obscure vision. Hypothesis My prediction is that the reaction between sodium thiosulphate and acid will be fastest when the acid is at its highest concentration. I did have some outliers in my results; however I think that the experiment went fairly well overall. This could have happened because of calculation errors, human errors, recording errors or a fault with the equipment that we used. This shows that as you increase the independent variable the concentration , the other variable the time taken for the experiment , went down. 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. The size of the error bars is quite small so I think I can say that my data is quite accurate except for the 2M result which is quite a long error bar.

An input of heat energy is required to start some reactions.

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Rates Of Reaction Coursework Evaluation