- Using the same but cleaned out conical flask, so we use the correct amount of solution and so the correct concentration is used.
- Measuring the solution to the amount of 60 centimetres cubed each time.
- By making sure that we use the same “X” each time we take a reading, so we do not get different results each time. If we used a smaller cross for instance, it would take less time to disappear.
- By taking three readings if necessary so we find the average. (Add all three results together and divide that number by 3 to find the average result for that particular reading.
Apparatus :-
Conical flask
Burettes containing sodium thiosulphate
Burettes containing water
Burettes containing hydrochloric acid
Beaker to collect from burettes
Piece of paper with cross drawn on it
Stop - clock
We will record the results on a table like the above one.
Prediction
The results should show us that the Concentration will affect the rate of the reaction, and there are many factors that will affect this. The reason that this happens is the simple fact that the speed of the reaction is proportional to the concentration of the sodium thiosulphate.
The reason for this is that because the concentration is grater, the ions in the solution are closer together. A reaction takes place when the ions in a solution collide and form bonds. This means that the closer together the ions are, the more of them collide, causing a faster reaction.
This means that if the concentration is doubled, the reaction time will be cut in half.
The quicker that a reaction takes place, the shorter that the time is needed for the reaction to finish. This means that the speed of a reaction is inversely proportional to the time taken for the reaction to finish.
OBTAINING EVIDENCE
Investigating The Effect Of Concentration Upon
The Rate Of A Reaction
OBTAINING EVIDENCE
We are performing an investigation to find the effect that changing the concentration of the solution has upon the time that it takes for two chemicals to react together.
We will perform the experiment and record the results that we are left with.
To get a result that is the same as the others and so we are left with a correlation that looks positive rather than there being n correlation and lots of anomalous points
Prediction
The results should show us that the Concentration will affect the rate of the reaction, and there are many factors that will affect this. The reason that this happens is the simple fact that the speed of the reaction is proportional to the concentration of the acid.
The reason for this is that because the concentration is grater, the ions in the solution are closer together. A reaction takes place when the ions in a solution collide and form bonds. This means that the closer together the ions are, the more of them collide, causing a faster reaction.
This means that if the concentration is doubled, the reaction time will be cut in half.
The quicker that a reaction takes place, the shorter that the time is needed for the reaction to finish. This means that the speed of a reaction is inversely proportional to the time taken for the reaction to finish.
Investigating The Effect Of Concentration Upon
The Rate Of A Reaction
OBTAINING EVIDENCE
We are performing an investigation to find the effect that changing the concentration of the solution has upon the time that it takes for two chemicals to react together.
We will perform the experiment and record the results that we are left with.
To get a result that is the same as the others and so we are left with a correlation that looks positive rather than there being n correlation and lots of anomalous points, we will find the three results and then find the average of the three by adding them together and the then dividing that number by 2.
I think that this set of results show a blatant pattern that the reaction time is much faster when there is the same amounts of water to acid, and as soon as there is a greater amount of water in comparison to a smaller amount of solution, there is a much, much longer reaction time.
ANYLISING AND CONSIDERING EVIDENCE
EVALUATING THE EVIDENCE
Investigating The Effect Of Concentration Upon
The Rate Of A Reaction
OBTAINING EVIDENCE
We are performing an investigation to find the effect that changing the concentration of the solution has upon the time that it takes for two chemicals to react together.
We will perform the experiment and record the results that we are left with.
To get a result that is the same as the others and so we are left with a correlation that looks positive rather than there being n correlation and lots of anomalous points, we will find the three results and then find the average of the three by adding them together and the then dividing that number by 2.
I think that this set of results show a blatant patten that the reaction time is much faster when there is the same amounts of water to acid, and as soon as there is a greater amount of water in comparison to a smaller amount of solution, there is a much, much longer reaction time.
