Chemistry
14th Edition
ISBN: 9781264243709
Author: Chang, Raymond
Publisher: MCGRAW-HILL HIGHER EDUCATION
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Textbook Question
Chapter 18, Problem 18.42QP
“Galvanized iron” is steel sheet that has been coated with zinc; “tin” cans are made of steel sheet coated with tin. Discuss the functions of these coatings and the
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Chapter 18 Solutions
Chemistry
Ch. 18.1 - Balance the following equation for the reaction in...Ch. 18.1 - Determine the number of electrons transferred in...Ch. 18.1 - For the following reaction in acidic solution,...Ch. 18.2 - Write the cell diagram for the following redox...Ch. 18.2 - Write the balanced redox reaction corresponding to...Ch. 18.3 - Can Sn reduce Zn2+(aq) under standard-state...Ch. 18.3 - What is the standard emf of a galvanic cell made...Ch. 18.3 - Prob. 1RCFCh. 18.3 - Prob. 2RCFCh. 18.4 - Prob. 4PE
Ch. 18.4 - Prob. 5PECh. 18.4 - Calculate the equilibrium constant for the...Ch. 18.4 - Prob. 2RCFCh. 18.4 - Prob. 3RCFCh. 18.5 - Prob. 6PECh. 18.5 - Prob. 7PECh. 18.5 - Consider the following cell diagram:...Ch. 18.5 - Calculate the cell voltage at 25C of a...Ch. 18.6 - How many Leclanch cells are contained in a 9-volt...Ch. 18.7 - Prob. 1RCFCh. 18.8 - An aqueous solution of Mg(NO3)2 is electrolyzed....Ch. 18.8 - A constant current is passed through an...Ch. 18.8 - What is the minimum voltage needed for the...Ch. 18.8 - Prob. 2RCFCh. 18.8 - In the electrolysis of molten CaCl2, a current of...Ch. 18 - Balance the following redox equations by the...Ch. 18 - Balance the following redox equations by the...Ch. 18 - Define the following terms: anode, cathode, cell...Ch. 18 - Describe the basic features of a galvanic cell....Ch. 18 - What is the function of a salt bridge? What kind...Ch. 18 - What is a cell diagram? Write the cell diagram for...Ch. 18 - What is the difference between the half-reactions...Ch. 18 - Prob. 18.8QPCh. 18 - Use the information in Table 2.1, and calculate...Ch. 18 - Discuss the spontaneity of an electrochemical...Ch. 18 - Calculate the standard emf of a cell that uses the...Ch. 18 - Calculate the standard emf of a cell that uses...Ch. 18 - Predict whether Fe3+ can oxidize I to I2 under...Ch. 18 - Which of the following reagents can oxidize H2O to...Ch. 18 - Consider the following half-reactions:...Ch. 18 - Predict whether the following reactions would...Ch. 18 - Which species in each pair is a better oxidizing...Ch. 18 - Which species in each pair is a better reducing...Ch. 18 - Consider the electrochemical reaction Sn2+ + X Sn...Ch. 18 - The Ecell for the following cell is 1.54 V at 25C:...Ch. 18 - Write the equations relating G and K to the...Ch. 18 - Prob. 18.22QPCh. 18 - Prob. 18.23QPCh. 18 - The equilibrium constant for the reaction...Ch. 18 - Use the standard reduction potentials to find the...Ch. 18 - Calculate G and Kc for the following reactions at...Ch. 18 - Under standard-state conditions, what spontaneous...Ch. 18 - Given that E = 0.52 V for the reduction...Ch. 18 - Prob. 18.29QPCh. 18 - Write the Nernst equation for the following...Ch. 18 - What is the potential of a cell made up of Zn/Zn2+...Ch. 18 - Calculate E, E, and G for the following cell...Ch. 18 - Calculate the standard potential of the cell...Ch. 18 - Referring to the arrangement in Figure 18.1,...Ch. 18 - Calculate the emf of the following concentration...Ch. 18 - Explain the differences between a primary galvanic...Ch. 18 - Discuss the advantages and disadvantages of fuel...Ch. 18 - The hydrogen-oxygen fuel cell is described in...Ch. 18 - Calculate the standard emf of the propane fuel...Ch. 18 - Prob. 18.41QPCh. 18 - Galvanized iron is steel sheet that has been...Ch. 18 - Tarnished silver contains Ag2S. The tarnish can be...Ch. 18 - Prob. 18.44QPCh. 18 - What is the difference between a galvanic cell...Ch. 18 - Describe the electrolysis of an aqueous solution...Ch. 18 - The half-reaction at an electrode is...Ch. 18 - Consider the electrolysis of molten barium...Ch. 18 - Prob. 18.49QPCh. 18 - If the cost of electricity to produce magnesium by...Ch. 18 - One of the half-reactions for the electrolysis of...Ch. 18 - How many moles of electrons are required to...Ch. 18 - Calculate the amounts of Cu and Br2 produced in...Ch. 18 - In the electrolysis of an aqueous AgNO3 solution,...Ch. 18 - A steady current was passed through molten CoSO4...Ch. 18 - A constant electric current flows for 3.75 h...Ch. 18 - What is the hourly production rate of chlorine gas...Ch. 18 - Chromium plating is applied by electrolysis to...Ch. 18 - The passage of a current of 0.750 A for 25.0 min...Ch. 18 - A quantity of 0.300 g of copper was deposited from...Ch. 18 - In a certain electrolysis experiment, 1.44 g of Ag...Ch. 18 - One of the half-reactions for the electrolysis of...Ch. 18 - A steady current of 10.0 A is passed through three...Ch. 18 - Industrially, copper metal can be purified...Ch. 18 - A Daniell cell consists of a zinc electrode in...Ch. 18 - A concentration cell is constructed having Cu...Ch. 18 - For each of the following redox reactions, (i)...Ch. 18 - The oxidation of 25.0 mL of a solution containing...Ch. 18 - The SO2 present in air is mainly responsible for...Ch. 18 - Prob. 18.70QPCh. 18 - Prob. 18.71QPCh. 18 - Oxalic acid (H2C2O4) is present in many plants and...Ch. 18 - Prob. 18.73QPCh. 18 - Prob. 18.74QPCh. 18 - From the following information, calculate the...Ch. 18 - Consider a galvanic cell composed of the SHE and a...Ch. 18 - A galvanic cell consists of a silver electrode in...Ch. 18 - Prob. 18.78QPCh. 18 - Calculate the emf of the following concentration...Ch. 18 - Prob. 18.80QPCh. 18 - Suppose you are asked to verify experimentally the...Ch. 18 - Prob. 18.82QPCh. 18 - An aqueous KI solution to which a few drops of...Ch. 18 - A piece of magnesium metal weighing 1.56 g is...Ch. 18 - Prob. 18.85QPCh. 18 - An acidified solution was electrolyzed using...Ch. 18 - In a certain electrolysis experiment involving...Ch. 18 - Consider the oxidation of ammonia:...Ch. 18 - When an aqueous solution containing gold(III) salt...Ch. 18 - In an electrolysis experiment, a student passes...Ch. 18 - People living in cold-climate countries where...Ch. 18 - Given that...Ch. 18 - A galvanic cell with Ecell = 0.30 V can be...Ch. 18 - Shown here is a galvanic cell connected to an...Ch. 18 - Fluorine (F2) is obtained by the electrolysis of...Ch. 18 - A 300-mL solution of NaCl was electrolyzed for...Ch. 18 - Industrially, copper is purified by electrolysis....Ch. 18 - An aqueous solution of a platinum salt is...Ch. 18 - Consider a galvanic cell consisting of a magnesium...Ch. 18 - A current of 6.00 A passes through an electrolytic...Ch. 18 - Prob. 18.101QPCh. 18 - Explain why most useful galvanic cells give...Ch. 18 - The table here shows the standard reduction...Ch. 18 - Consider a concentration cell made of the...Ch. 18 - A silver rod and a SHE are dipped into a saturated...Ch. 18 - Zinc is an amphoteric metal; that is, it reacts...Ch. 18 - Use the data in Table 18.1 to determine whether or...Ch. 18 - The magnitudes (but not the signs) of the standard...Ch. 18 - A galvanic cell is constructed as follows. One...Ch. 18 - Given the standard reduction potential for Au3+ in...Ch. 18 - Prob. 18.111QPCh. 18 - When 25.0 mL of a solution containing both Fe2+...Ch. 18 - Consider the Daniell cell in Figure 18.1. When...Ch. 18 - Use the data in Table 18.1 to show that the...Ch. 18 - Consider two electrolytic cells A and B. Cell A...Ch. 18 - A galvanic cell consists of a Mg electrode in a 1...Ch. 18 - The concentration of sulfuric acid in the...Ch. 18 - Consider a Daniell cell operating under...Ch. 18 - An electrolysis cell was constructed similar to...Ch. 18 - Prob. 18.120QPCh. 18 - Prob. 18.121QPCh. 18 - Prob. 18.122QPCh. 18 - A piece of magnesium ribbon and a copper wire are...Ch. 18 - The zinc-air battery shows much promise for...Ch. 18 - Calculate E for the reactions of mercury with (a)...Ch. 18 - Because all alkali metals react with water, it is...Ch. 18 - A galvanic cell using Mg/Mg2+ and Cu/Cu2+...Ch. 18 - Given the following standard reduction potentials,...Ch. 18 - Compare the pros and cons of a fuel cell, such as...Ch. 18 - Lead storage batteries are rated by ampere hours,...Ch. 18 - Use Equations (17.10) and (18.3) to calculate the...Ch. 18 - A construction company is installing an iron...Ch. 18 - A 9.00 102-mL 0.200 M MgI2 was electrolyzed. As a...Ch. 18 - Based on the following standard reduction...Ch. 18 - Calculate the equilibrium constant for the...Ch. 18 - The nitrite ion (NO2) in soil is oxidized to...Ch. 18 - The diagram here shows an electrolytic cell...Ch. 18 - Fluorine is a highly reactive gas that attacks...Ch. 18 - Show a sketch of a galvanic concentration cell....Ch. 18 - The emf of galvanic cells varies with temperature...Ch. 18 - A concentration cell ceases to operate when the...Ch. 18 - It has been suggested that a car can be powered...Ch. 18 - Estimate how long it would take to electroplate a...Ch. 18 - The potential for a cell based on the standard...
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- By malonic or acetylacetic synthesis, synthesize 2-methylbutanoic acid (indicate the formulas of the compounds).arrow_forwardObtain 2-methylbutanoic acid by malonic or acetylacetic synthesis (indicate the formulas of the compounds involved).arrow_forwardEFFICIENTS SAMPLE READINGS CONCENTRATIONS Pigiadient) TOMATO SAUCE (REGULAR) TOMATO (REDUCED SALT) TOMATO SAUCE (REGULAR) TOMATO (REDUCED SALT) 58 6.274 3.898 301.7 151.2 14150 5.277 3.865 348.9 254.8 B 5.136 3.639 193.7 85.9 605 4.655 3.041 308.6 199.6 05 5.135 3.664 339.5 241.4 0139 4.676 3.662 160.6 87.6 90148 5.086 3.677 337.7 242.5 0092 6.348 3.775 464.7 186.4 PART3 5.081 3.908 223.5 155.8 5.558 3.861 370.5 257.1 4.922 3.66 326.6 242.9 4.752 3.641 327.5 253.3 50 5.018 3.815 336.1 256.0 84 4.959 3.605 317.9 216.6 38 4.96 3.652 203.8 108.7 $3 5.052 3.664 329.8 239.0 17 5.043 3.767 221.9 149.7 052 5.058 3.614 331.7 236.4 5.051 4.005 211.7 152.1 62 5.047 3.637 309.6 222.7 5.298 3.977 223.4 148.7 5.38 4.24 353.7 278.2 5 5.033 4.044 334.6 268.7 995 4.706 3.621 305.6 234.4 04 4.816 3.728 340.0 262.7 16 4.828 4.496 304.3 283.2 0.011 4.993 3.865 244.7 143.6 AVERAGE STDEV COUNT 95% CI Confidence Interval (mmol/L) [Na+] (mg/100 mL) 95% Na+ Confidence Interval (mg/100 mL)arrow_forward
- If we have two compounds: acetone (CH₃COCH₃) and acetic acid (CH₃COOH), applying heat to them produces an aldol condensation of the two compounds. If this is correct, draw the formula for the final product.arrow_forwardIf we have two compounds: acetone (CH3COCH3) and acetic acid (CH3COOH); if we apply heat (A), what product(s) are obtained?arrow_forwardQUESTION: Fill out the answers to the empty green boxes attached in the image. *Ensure you all incorporate all 27 values (per column)*arrow_forward
- You need to make a buffer by dissolving benzoic acid and sodium benzoate in water. What is the mass of benzoic acid that you would weigh out, in mg, to create 50 mL of a buffer at pH = 4.7 that will change pH no more than 0.10 units with the addition of 0.001 moles of acid or base? Enter just the answer without the units (mg) - just the number will do!arrow_forwardDraw the formula for 3-isopropylcyclopentane-1-carbonyl chloride.arrow_forwardQUESTION: Fill out the answers to the empty green boxes attached in the image. *Ensure you all incorporate all 27 values (per column)*arrow_forward
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