Science
ChemistryChemistry for Engineering StudentsChrome is plated from solutions of chromium(lll) ions. If a particular application requires 13.7 g of chromium in the coating and the run takes 90 minutes, what current was used?

Chrome is plated from solutions of chromium(lll) ions. If a particular application requires 13.7 g of chromium in the coating and the run takes 90 minutes, what current was used?

BuyFind

Chemistry for Engineering Students

4th Edition
Lawrence S. Brown + 1 other
Publisher: Cengage Learning
ISBN: 9781337398909
BuyFind

Chemistry for Engineering Students

4th Edition
Lawrence S. Brown + 1 other
Publisher: Cengage Learning
ISBN: 9781337398909

Solutions

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Chapter 13, Problem 13.76PAE
Textbook Problem

Chrome is plated from solutions of chromium(lll) ions. If a particular application requires 13.7 g of chromium in the coating and the run takes 90 minutes, what current was used?

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Chapter 13 Solutions

Chemistry for Engineering Students
Ch. 13 - • describe at least three types of corrosion and...Ch. 13 - • define oxidation and reduction.Ch. 13 - • write and balance half-reactions for simple...Ch. 13 - • describe the differences between galvanic and...Ch. 13 - • use standard reduction potentials to calculate...Ch. 13 - • use standard reduction potentials to predict the...Ch. 13 - • calculate the amount of metal plated, the amount...Ch. 13 - • distinguish between primary and secondary...Ch. 13 - • describe the chemistry of some common battery...Ch. 13 - • describe at least three common techniques for...
Ch. 13 - When you look at several older cars that are...Ch. 13 - What type of corrosion is associated with each of...Ch. 13 - Using the Internet, find three cases where...Ch. 13 - Using the Internet, find three cases where concern...Ch. 13 - For the following oxidationreduction reactions,...Ch. 13 - Which half-reaction takes place at the anode of an...Ch. 13 - If a salt bridge contains KNO3 as its electrolyte,...Ch. 13 - If a salt bridge contains KNO3 as its electrolyte,...Ch. 13 - The following oxidationreduction reactions are...Ch. 13 - Write a balanced chemical equation for the overall...Ch. 13 - For the reactions in parts (a) and (b) in the...Ch. 13 - Explain why the terms cell potential and...Ch. 13 - How does galvanic corrosion differ from uniform...Ch. 13 - How can each of the following serve as both the...Ch. 13 - A student who has mercury amalgam fillings in some...Ch. 13 - Based on the cell potential measured for the cells...Ch. 13 - If the reaction at a standard hydrogen electrode...Ch. 13 - Four voltaic cells are set up. In each, one...Ch. 13 - In tables of standard reduction potentials that...Ch. 13 - In the table of standard reduction potentials,...Ch. 13 - Using values from the table of standard reduction...Ch. 13 - Using values from the table of standard reduction...Ch. 13 - One half-cell in a voltaic cell is constructed...Ch. 13 - Four metals, A, B, C, and D, exhibit the following...Ch. 13 - Use the Nernst equation to calculate the cell...Ch. 13 - One half-cell in a voltaic cell is constructed...Ch. 13 - We noted that a tin-plated steel can corrodes more...Ch. 13 - The following half-cells are available: Ag(s);...Ch. 13 - You are a chemical engineer in a firm that...Ch. 13 - Immediately after a person has his or her ears (or...Ch. 13 - In May 2000, a concrete pedestrian walkway...Ch. 13 - Calculate the standard free energy change for the...Ch. 13 - Calculate the standard free energy change for the...Ch. 13 - Suppose that you cannot find a table of standard...Ch. 13 - Use the potential of the galvanic cell,...Ch. 13 - Which of the following reactions is (are)...Ch. 13 - Consult a table of standard reduction potentials...Ch. 13 - The equilibrium constant for a reaction is 31015...Ch. 13 - Some calculators cannot display results of an...Ch. 13 - Calculate the equilibrium constant for the...Ch. 13 - Use the standard reduction potentials for the...Ch. 13 - Hydrogen peroxide is often stored in the...Ch. 13 - Calculate the equilibrium constant for the redox...Ch. 13 - An engineer is assigned to design an...Ch. 13 - A magnesium bar with a mass of 6.0 kg is attached...Ch. 13 - Zinc is used as a coating for galvanized steel,...Ch. 13 - Sacrificial anodes are sometimes connected to...Ch. 13 - What is the principal difference between a primary...Ch. 13 - Based on the chemistry that takes place, explain...Ch. 13 - If you put a 9-volt battery in a smoke detector in...Ch. 13 - If alkaline batteries were not alkaline but rather...Ch. 13 - What would happen to the voltage of an alkaline...Ch. 13 - What product forms from the lead components of a...Ch. 13 - The electrolyte solution in a zinc-air battery...Ch. 13 - You are an electrical engineer investigating...Ch. 13 - Assume the specifications of a Ni-Cd voltaic cell...Ch. 13 - On the Internet, access the website of a major...Ch. 13 - What is the difference between active and passive...Ch. 13 - When aluminum is refined by electrolysis from its...Ch. 13 - What complication arises in the electrolytic...Ch. 13 - In an electroplating operation, the cell potential...Ch. 13 - When copper wire is placed in a solution of silver...Ch. 13 - In barrel plating, why is the barrel containing...Ch. 13 - When a coating is plated onto a metal, two...Ch. 13 - Use the Internet to find electroplating companies...Ch. 13 - Based on the reaction used for silver plating,...Ch. 13 - If a current of 15 A is run through an...Ch. 13 - Suppose somebody in a laboratory doesn't quite...Ch. 13 - If a barrel plating run uses 200.0 A for exactly 6...Ch. 13 - An electrical engineer is analyzing an...Ch. 13 - In a copper plating experiment in which copper...Ch. 13 - A metallurgist wants to gold-plate a thin sheet...Ch. 13 - Tin-plated steel is used for "tin" cans. Suppose...Ch. 13 - An electrolysis cell for aluminum production...Ch. 13 - If a plating line that deposits nickel (from NiCl2...Ch. 13 - Chrome is plated from solutions of chromium(lll)...Ch. 13 - When a lead storage battery is recharged by a...Ch. 13 - A small part with a surface area of 2.62 cm2 is...Ch. 13 - An engineer is designing a mirror for an optical...Ch. 13 - What two characteristics of lithium-ion batteries...Ch. 13 - Explain why lithium-ion batteries tend to be...Ch. 13 - What characteristic of lithium ions makes it...Ch. 13 - Looking at Figure 13.23, describe how the...Ch. 13 - Use the web to research how Boeing addressed the...Ch. 13 - What is the role of a salt bridge in the...Ch. 13 - Explain why a substance that is oxidized is called...Ch. 13 - If the SHE was assigned a value of 3.00 V rather...Ch. 13 - Explain why a large negative value for the...Ch. 13 - How is the relationship between maximum electrical...Ch. 13 - A chemical engineering student is studying the...Ch. 13 - Would nickel make an acceptable sacrificial anode...Ch. 13 - If a logarithmic scale had not been used for the...Ch. 13 - Battery manufacturers often assess batteries in...Ch. 13 - Suppose you had a fresh battery and wanted to...Ch. 13 - Why is it easier to force an oxidation—reduction...Ch. 13 - In any electrochemical cell, reduction occurs at...Ch. 13 - As the voltaic cell shown here runs, the blue...Ch. 13 - Suppose that a student mistakenly thinks that...Ch. 13 - For a voltage-sensitive application, you are...Ch. 13 - 13.100 For a battery application, you need to get...Ch. 13 - 13.101 An oxidationreduction reaction using Sn(s)...Ch. 13 - 13.102 You are designing a system for a rather...Ch. 13 - 13.103 You need to use a gold-plated connector in...Ch. 13 - 13.104 (a) What happens when a current is passed...Ch. 13 - A current is passed through a solution of...Ch. 13 - 13.106 Hydrazine, N2H4 , has been proposed as the...Ch. 13 - A button case for a small battery must be silver...

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