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Electrolysis of Water: Vanderbilt Student Training Presentation 2012

Learn how electrical energy is converted to chemical energy through electrolysis. Explore examples of energy conversions in motors, heaters, light bulbs, and more. Discover the process of decomposing water into hydrogen and oxygen using electrolysis. See the results of electrolysis experiments and understand the principles behind this transformation. Gain insights into the importance of ion solutions for conducting electricity and the role of different electrodes in the electrolysis process.

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Electrolysis of Water: Vanderbilt Student Training Presentation 2012

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  1. Electrolysis of Water Vanderbilt Student Volunteers for Science Training Presentation Spring 2012

  2. Conversions of Electrical Energy to Other Forms in these Examples Motors Heaters, toasters Light bulbs Electrolysis of water Doorbells Electrical Energy is Converted to: • Mechanical • Thermal • Light • Chemical • Sound

  3. Electrical Energy  Chemical Energy (Electrolysis) Procedure (Part A) • Attach the alligator clips from the 9-volt battery to the electrodes. • Submerge the electrodes in distilled water. Results • Nothing happens in the distilled water.

  4. Electrical Energy  Chemical Energy – Electrolysis Part B • Attach the alligator clips from the 9-volt battery to the electrodes. • Add sodium sulfate salt into jar of distilled water. Submerge the electrodes into the salt water. Part C • Add Universal Indicator until solution is light green.

  5. Electrical Energy  Chemical Energy – Electrolysis Results • Oxygen gas bubbles at positive red electrode, hydrogen gas bubbles at black negative. • Universal Indicator turns purple color (basic) at negative, pink color (acidic) at positive electrode. • Hydrogen bubbles leave OH-. Oxygen bubbles leave H+. Conclusion • Electrical energy comes from the battery. • The electric energy is converted into chemical energy to decompose water. • Water is decomposed into hydrogen and oxygen. • Only ion solutions will conduct electricity.

  6. Distilled water + sodium sulfate conducts electricity  Decomposition of water Distilled water can not conduct electricity  No reaction Negative Hydrogen Positive Oxygen

  7. Negative Basic Positive Acidic

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