fairfolio
Saved Projects

Boiling Point Elevation

CSEF · 2006 Chemistry

Timothy D. Tang · Deerfield Elementary School, Irvine

Overview

Objectives/Goals This science experiment is being done on boiling point elevation, or the law that says adding solutes to solvent increases its boiling point. In this experiment, various amounts of different solutes will be added to water and the change in boiling point will be observed. The data will then be graphed and examined for the study of the pattern of this change. Methods/Materials Materials: 200g Sodium Chloride, 250g Potassium Chloride, 500g Potassium Carbonate, 1 Precision Thermometer, 1 sacle, stove, 3 Litres Distilled Water, 1 Boiling Flask, 1 Stirring Stick, 5 Plastic Measuring Cups, 1 Potholder Procedures: Add solutes one mole (unit to describe amount of substance) at a time to water and boil the solution each time. Measure this and record results. Graph data, observe, and form conclusions. Results Adding solutes did raise the boiling point, and the more added, the higher the temperature change. Also, the boiling point elevation equation, which explains the change in temperature of a solvent when solutes are added, was proven true. Conclusions/Discussion 1. Added solutes increase the boiling point of a solvent. The hypothesis compared well with the results of the experiment. The added solutes did elevate the boiling point, as shown in the experimental data. 2. The boiling point elevation equation is true. The equation was roughly accurate in comparison to the results of the experiment, but a few of the temperatures were off by a few tenths of a degree, especially when the concentration of the solute grew. The reason could be because of impurities in solute, instrumental error, human error, etc. There is another suspected factor when the moles of solute are no longer small compared with the moles of solvent present. See details in the future research section. 3. The type of solute added does not matter. The experiment also showed that the type of solute added to the solvent did not matter. It is the molality of the substance that determines the change in boiling point. All in all, the hypothesis was fairly accurate compared to the results of the experiment

Summary statement

This project is on boiling point elevation, which says that adding solutes to a solvent will raise its boiling point.

Help received

Dad helped run experiment and proofread notebook. Mr. Cady, my teacher, taught me how to make a science project.

Awards (1)

  • Category Award

Competition history

  • CSEF 2006 Chemistry · Entry J0535

Resources

Related projects

Closest projects by meaning, across every fair and year in the corpus.

Browse more like this

Source: California Science & Engineering Fair public projects

Save projects to your library

Sign in with Google to keep track of projects you find interesting, organized into folders. An account also raises your daily allowance for “Has this been done?”, and lets you create a key for the MCP server with a much higher limit than anonymous use. Browsing stays public.

Continue with Google