To keep the test as fair as possible, all the variables will remain constant (except for the temperature). As I previously stated it is important to complete the experiment as quickly as possible so the results are as accurate as can be.
Prediction:
When ionic compounds such as salt (NaCl) dissolve in water, the slight electrical charge in the salt attracts water molecules that pull the ions from the giant structure.
The oxygen end of the water is slightly negative compared to the hydrogen end.
Heat causes the molecular bonds of the salt to break. Therefore the higher the temperature the more the bonds are broken. Individual ions then bond with the water molecules.
This is how an ionic structure dissolves in water.
However, sucrose is a molecular compound. So assuming the same will happen when you dissolve a molecular structure into the water then as temperature increases the more sucrose will dissolve into the water.
I shall have to find out ounce my results have been collected.
Results:
In places there is a large difference between each set of results. However you can see from the average table that there is a strong positive correlation between the temperature and the amount of sucrose that scan be dissolved. As the temperature increases, so does the amount of dissolved sucrose. They are directly proportional.
Conclusion:
My results and graph show a strong positive correlation between temperature and the amount of dissolved sucrose. As temperature increases, the amount of sucrose that can be dissolved in water also increases. They are directly proportionate.
I predicted that the sucrose, a simple molecular compound, would behave in the same way as an ionic compound such as salt.
As the temperature of the water increased the molecular bonds were able to break easily. Individual ions from the solute then bonded with the solvent until no more molecular bonds could be broken and the solution became saturated.
Therefore my prediction was consistent with my results, and I conclude that simple molecular compounds dissolve better at higher temperatures in water, in the same way that ionic compounds do.
Evaluation:
On the whole, I believe that the experiment went marvellously. We were able to complete our experiment and repeat the test efficiently.
In general, my results proved that there was a direct relationship between temperature and the amount of sucrose that can be dissolved.
However, for both sets of results, in places are large differences between the amount of dissolved sucrose. This may have occurred due to falls in temperature; this is because it was difficult to maintain a constant temperature (particularly higher temperatures) with limited facilities.
I think I could have been more precise when stirring the solution with trying to keep the speed constant. My results could have been more accurate if we could have kept the temperature constant by using a water bath as this would keep the temperature on the outside of the chronicle flask the same temperature as the internal solution.
I think the evidence based upon my graph and results table are sufficient enough to support my conclusion and prove my prediction, although I think that another set of results would confirm the anomalous results and difference between results.
I would like to complete further investigations to find out whether temperature is directly proportionate to all simple molecular compounds and if not why not?
