Main Introduction Initial Observation and Hypothesis Materials and Equipment Experiment Discussion Applications Conclusions

Project Information

Salty Zap

Mariya Sardarli (Grade 6), Rustam Sardarli (Grade 5)

· Grade Category: 4 – 6

· Team Size: 2

· Subject Area: Chemistry

· Project type: Experimental

· Language: English

· Software Tools Used: Webpage Software, Lexmark Photo Editor, Microsoft Excel

· Hardware Tools Used: Digital Camera

· The Source of the Idea for the Project: Faraday’s Electrolysis Laws

· Special Skills: Making simple electrical circuits, Microsoft Excel, Webpage Design, Photo Edition

Summary of the Project

1. When an electric current passes through the solution of sodium chloride chemical changes occur at the electrodes. As a result chlorine gas is produced at the anode and the solution turns yellow. At the cathode the sodium hydroxide and hydrogen are produced. Faraday’s Laws of Electrolysis give the relationship between the chemical and electrical properties of a solution.

2. The dependence of Current vs. the Concentration was experimentally observed.

3. Using the mathematical form of Faraday’s Electrolysis Laws we showed that the current through the solution depends on the concentration of the soluble substance and that the current through the salt/water solutions increased with the concentration of salt.

4. An experimental setup was calibrated for the above-mentioned dependence.

5. A device to determine the concentration of salt in salt/water solutions was made based on the experimental results.