Liquids and Boiling Point Elevation Questions

1. What were the changes that you noticed?
Unfortunately, we were not able to complete this lab, therefore we could not analyze the different solutions to see any changes. When we boiled the 200 mL of water without salt, we obtained a boiling point of 99.8 degrees Celsius. Our boiling point was a very similar to our hypothesized boiling point of 100 degrees Celsius. We began the second step of adding salt
(NaCl) to our solution, however due to time constraint we had to stop in the middle of boiling our solution. We presume that the boiling point would increase from step one.
2. What were your results compared to the other groups?
In the first step of the lab, most groups had around the same boiling point between 95 and 100 degrees Celsius. As we continued the experiment many groups had a steady change in temperature, usually increasing a few degrees. However, there were one and two groups whose boiling points decreased or remained the same. This was interesting, as ideally, the boiling point should only increase a few degrees. There were many factors that determined the increases and decreases of temperature, such as amount of water added, NaCl added, and the boiling point of the solutions. Overall, most groups had a steady increase in temperature in each step of the experiment.
3. What were the relative differences?
Refer to question #2
4. What was the relative change in boiling point?
Our group did not reach this step in the lab due to time constraint. However, our hypothesis based on other groups' work would be that the temperature would increase a few degrees if we doubled the amount of solute. It would have been interesting to evaluate the changes in boiling point if we doubled the amount of solute.