1. Are the objective and introduction written in an engaging way? Yes No     If 'No' please explain. characters left 2. Is the difficulty level accurate? Yes No     If 'No' please explain. characters left 3. Were the materials easily obtained? Yes No     If 'No' please explain. characters left 4. Was the procedure clear? Yes No      If 'No' please explain. characters left 5. Were all safety measures included? Yes No      If 'No' please explain. characters left 6. Did you obtain clear, unambiguous results? Yes No     If 'No' please explain. characters left 7. How much time did you spend on the project? Choose One... A day or less Several days About one week A couple weeks Several weeks to months 8. How much did the project cost? Choose One... Less than $20 $20 - $50 $50 - $100 $100 - $150 $150+ Optional:  Do you have any suggestions to improve this project? characters left Optional:  Attach a picture of your project (JPG, JPEG, GIF, PNG only) Optional:  Caption for picture characters left Thank you for your feedback! * Note: This is an abbreviated project idea, without notes to start your background research or a procedure for how to do the experiment. You can identify abbreviated project ideas by the asterisk at the end of the title. If you want a project idea with full instructions, please pick one without an asterisk. Abstract You can take advantage of electrochemistry and make a battery to clean tarnished silverware without scrubbing. You should learn about how batteries work and study oxidation-reduction reactions so that you can explain how this process works. You'll need a pan large enough to hold the pieces of silverware, and deep enough to cover them in solution while boiling gently. Line the pan with aluminum foil, and place the silverware inside the pan, making sure that each piece touches the foil. Add water to cover the silverware, then add a teaspoon of salt and a teaspoon of baking soda for each liter of water in the pan. Heat the pan on the stove until the water boils, then reduce the heat so that it boils gently. The tarnish (silver sulfide) gradually dissolves, producing silver (Ag+) and sulfide (S2−) ions in solution. Electrons are transferred from aluminum atoms (Al) to the silver ions, producing silver atoms (Ag) and aluminum ions (Al3+). The silverware is functioning as the positive pole of the battery, and the aluminum as the negative pole. The silver atoms plate out of solution on the silverware, and the sulfide ions form insoluble sulfides with various positive ions in the solution. What is common to all batteries? How do batteries differ? With help from an adult, design and build a battery and prove that it works by lighting a flashlight bulb or powering a small electric motor. Variations For more science project ideas in this area of science, see Chemistry Project Ideas. Last edit date: 2006-12-27 17:42:49

I Did This Project! Tell us about your experience with this science project. What was the most important thing you learned? characters left What problems did you encounter? (Enter "none" if you had none.) characters left Can you suggest any improvements or ideas? (Enter "no" if you have none.) characters left How do you rate this project? Poor OK Good Very Good Excellent Optional:  Attach a picture of your project (JPG, JPEG, GIF, PNG only) Optional:  Caption for picture characters left Thank you for your feedback! Related Links Science Fair Project Guide Chemistry Safety Guide Project Summary Difficulty  8  Time required Short (several days) Safety Adult supervision required. Share this Project Idea! Donate to Science Buddies www.astellasusafoundation.org

Career Focus

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	Chemical Engineer Chemical engineers solve the problems that affect our everyday lives by applying the principles of chemistry. If you enjoy working in a chemistry laboratory and are interested in developing useful products for people, then a career as a chemical engineer might be in your future.			Electrical & Electronics Engineer Just as a potter forms clay, or a steel worker molds molten steel, electrical and electronics engineers gather and shape electricity and use it to make products that transmit power or transmit information. Electrical and electronics engineers may specialize in one of the millions of products that make or use electricity, like cell phones, electric motors, microwaves, medical instruments, airline navigation system, or handheld games.
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