Question
20) Use the Electrostatic Series to determine the charge that two neutral objects would have after they are rubbed together. If nothing happens, then state "nothing happens." [4 marks] a) Plastic is rubbed with hair. Plastic becomes __ Hair becomes __ b) Zinc is rubbed with aluminum. Zinc becomes __ Aluminum becomes __ c) Glass is rubbed with rubber Glass becomes __ Rubber becomes __ d) Of the 3 situations above, circle the letter of the materials that will produce the greatest charge difference?
Solution
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Genevieve
Elite ยท Tutor for 8 years
Answer
20)Here's how to determine the charges using the Electrostatic Series: The material higher on the list becomes positive (loses electrons), and the material lower on the list becomes negative (gains electrons).**Electrostatic Series (from positive to negative):*** Glass* Hair* Nylon* Wool* Fur* Lead* Silk* Aluminum* Paper* Cotton* Steel* Rubber* Nickel, Copper* Brass, Silver* Gold, Platinum* Sulfur* Acetate, Rayon* Polyester* Styrofoam* Orlon* Saran Wrap* Polyurethane* Polyethylene (plastic)* Teflon**a) Plastic is rubbed with hair.**Plastic becomes **negative**Hair becomes **positive** (Hair is higher on the series than plastic)**b) Zinc is rubbed with aluminum.**Zinc becomes **negative**Aluminum becomes **positive** (Aluminum is higher on the series, though the difference is small, suggesting a weak charge)**c) Glass is rubbed with rubber.**Glass becomes **positive**Rubber becomes **negative** (Glass is significantly higher on the series than rubber)**d) Of the 3 situations above, (c) Glass rubbed with rubber** will produce the greatest charge difference. They are farther apart on the electrostatic series than the other pairs, indicating a greater tendency for electron transfer.