How do initial boiling points compare?
Why? Sample 2 has a higher boiling point because it has a higher concentration of sugar in solution. Increasing the amount of soluble substances in a solution raises the boiling point of a liquid. Boiling points of pure sucrose solutions are indicators of concentration of the solution. For every one mole sucrose added the boiling point is raised 0.520 C. Page 41 2. How do final volumes of the two solutions compare? Why? The final volume of sample 2, the more concentrated solution, had a much greater final volume. Because much more sugar was added to start off with, less water had to be driven off to reach the same sugar concentration as indicated by the reading on the thermometer of 1060 C. 3. Why did Sample 1 take the longest to reach the specified final boiling point? Temperature is an indicator of sugar concentration. Sugar solutions do not have a constant boiling point. As the solution is heated, water vaporizes from the solution, resulting in an increasingly concentrated solution.
