Electricity: Static Electricity
Static Electricity: Audio Guided Solution
A 250 mL aqueous solution contains 2.37 g of copper(II) chloride. The dissolved copper(II) chloride is dissociated into copper(II) and chloride ions. Each copper(II) ion has two less electrons than protons. A scientist wishes to use an electroplating process to reduce the 1.12 g of copper ions to solid copper atoms. To be reduced from the ion form to the atom form, a copper(II) ion must gain two electrons. Each gram of copper(II) ions contains 9.48 x 1021
ions. Determine the total quantity of charge that must be supplied to turn the copper(II) ions into solid copper atpms.
Audio Guided Solution
Habits of an Effective Problem Solver
Read the problem carefully and develop a mental picture of the physical situation. If necessary, sketch a simple diagram of the physical situation to help you visualize it.
Identify the known and unknown quantities; record them in an organized manner. A diagram is a great place to record such information. Equate given values to the symbols used to represent the corresponding quantity - e.g., Q1 = 2.4 μC; Q2 = 3.8 μC; d = 1.8 m; Felect = ???.
Use physics formulas and conceptual reasoning to plot a strategy for solving for the unknown quantity.
Identify the appropriate formula(s) to use.
Perform substitutions and algebraic manipulations in order to solve for the unknown quantity.
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