Chemistry: Atoms First
3rd Edition
ISBN: 9781259923142
Author: Burdge
Publisher: MCG
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Chapter 18, Problem 18.56QP
Chromium plating is applied by
How long (in hours) would it take to apply a chromium plating 1.0 × 10−2 mm thick to a car bumper with a surface area of 0.25 m2 in an electrolytic cell carrying a current of 25.0 A? (The density of chromium is 7.19 g/cm3.)
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Experiment:
Each team will be provided with 5g of a mixture of acetanilide and salicylic acid. You will divide it into three 1.5 g portions in separate 125 mL Erlenmeyer flasks savıng some for melting point analysis. Dissolve the mixture in each flask in ~60mL of DI water by heating to boiling on a hotplate. Take the flasks off the hotplate once you have a clear solution and let them stand on the bench top for 5 mins and then allow them to cool as described below.
Sample A-Let the first sample cool slowly to room temperature by letting it stand on your lab bench, with occasional stirring to promote crystallization.
Sample B-Cool the second sample 1n a tap-water bath to 10-15 °C
Sample C-Cool the third sample in an ice-bath to 0-2 °C
Results:
weight after recrystalization and melting point temp.
A=0.624g,102-115°
B=0.765g, 80-105°
C=1.135g, 77-108
What is the percent yield of A,B, and C.
Chapter 18 Solutions
Chemistry: Atoms First
Ch. 18.1 - Permanganate ion and iodide ion react in basic...Ch. 18.1 - Use the half-reaction method to balance the...Ch. 18.1 - Use the half-reaction method to balance the...Ch. 18.1 - Prob. 18.1.1SRCh. 18.1 - MnO4 and C2O42 react in basic solution to form...Ch. 18.3 - A galvanic cell consists of an Mg electrode in a...Ch. 18.3 - Determine the overall cell reaction and Ecell (at...Ch. 18.3 - A galvanic cell with Ecell = 0.30 V can be...Ch. 18 - Balance the following redox equations by the...Ch. 18 - Balance the following redox equations by the...
Ch. 18 - In the first scene of the animation, when a zinc...Ch. 18 - What causes the change in the potential of the...Ch. 18 - Why does the color of the blue solution in the...Ch. 18 - Prob. 18.4VCCh. 18 - Define the following terms: anode, cathode, cell...Ch. 18 - Prob. 18.4QPCh. 18 - Prob. 18.5QPCh. 18 - What is a cell diagram? Write the cell diagram for...Ch. 18 - What is the difference between the half-reactions...Ch. 18 - Discuss the spontaneity of an electrochemical...Ch. 18 - Prob. 18.9QPCh. 18 - Prob. 18.10QPCh. 18 - Calculate the standard emf of a cell that uses...Ch. 18 - Prob. 18.12QPCh. 18 - Prob. 18.13QPCh. 18 - Consider the following half-reactions....Ch. 18 - Predict whether NO3 ions will oxidize Mn2+ to MnO4...Ch. 18 - Prob. 18.16QPCh. 18 - Prob. 18.17QPCh. 18 - Prob. 18.18QPCh. 18 - Prob. 18.19QPCh. 18 - Use the information m Table 2.1, and calculate the...Ch. 18 - Prob. 18.21QPCh. 18 - Prob. 18.22QPCh. 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 - Prob. 18.26QPCh. 18 - Balance (in acidic medium) the equation for the...Ch. 18 - Prob. 18.28QPCh. 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 - What is the emf of a cell consisting of a Pb2+/Pb...Ch. 18 - Prob. 18.35QPCh. 18 - Calculate the emf of the following concentration...Ch. 18 - What is a battery? Describe several types of...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 - What is the difference between a galvanic cell...Ch. 18 - Prob. 18.43QPCh. 18 - Calculate the number of grams of copper metal that...Ch. 18 - Prob. 18.45QPCh. 18 - Consider the electrolysis of molten barium...Ch. 18 - Prob. 18.47QPCh. 18 - Prob. 18.48QPCh. 18 - Prob. 18.49QPCh. 18 - How many faradays of electricity are required to...Ch. 18 - Calculate the amounts of Cu and Br2 produced in...Ch. 18 - Prob. 18.52QPCh. 18 - Prob. 18.53QPCh. 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 - Prob. 18.60QPCh. 18 - Prob. 18.61QPCh. 18 - Prob. 18.62QPCh. 18 - Tarnished silver contains Ag2S. The tarnish can be...Ch. 18 - Prob. 18.64QPCh. 18 - For each of the following redox reactions, (i)...Ch. 18 - Prob. 18.66QPCh. 18 - Prob. 18.67QPCh. 18 - Prob. 18.68QPCh. 18 - Prob. 18.69QPCh. 18 - Prob. 18.70QPCh. 18 - Prob. 18.71QPCh. 18 - Prob. 18.72QPCh. 18 - Prob. 18.73QPCh. 18 - Prob. 18.74QPCh. 18 - A galvanic cell consists of a silver electrode in...Ch. 18 - Explain why chlorine gas can be prepared by...Ch. 18 - Prob. 18.77QPCh. 18 - Prob. 18.78QPCh. 18 - Prob. 18.79QPCh. 18 - Prob. 18.80QPCh. 18 - Prob. 18.81QPCh. 18 - Prob. 18.82QPCh. 18 - An acidified solution was electrolyzed using...Ch. 18 - Prob. 18.84QPCh. 18 - Consider the oxidation of ammonia....Ch. 18 - Prob. 18.86QPCh. 18 - Prob. 18.87QPCh. 18 - Prob. 18.88QPCh. 18 - Prob. 18.89QPCh. 18 - Prob. 18.90QPCh. 18 - Prob. 18.91QPCh. 18 - Prob. 18.92QPCh. 18 - An aqueous solution of a platinum salt is...Ch. 18 - Prob. 18.94QPCh. 18 - Prob. 18.95QPCh. 18 - Prob. 18.96QPCh. 18 - Prob. 18.97QPCh. 18 - A silver rod and a SHE are dipped into a saturated...Ch. 18 - Prob. 18.99QPCh. 18 - Prob. 18.100QPCh. 18 - The magnitudes (but not the signs) of the standard...Ch. 18 - Prob. 18.102QPCh. 18 - Given the standard reduction potential for Au3+ in...Ch. 18 - Prob. 18.104QPCh. 18 - Prob. 18.105QPCh. 18 - Prob. 18.106QPCh. 18 - Prob. 18.107QPCh. 18 - Prob. 18.108QPCh. 18 - Prob. 18.109QPCh. 18 - Prob. 18.110QPCh. 18 - Prob. 18.111QPCh. 18 - In recent years there has been much interest in...Ch. 18 - Prob. 18.113QPCh. 18 - Prob. 18.114QPCh. 18 - Prob. 18.115QPCh. 18 - Prob. 18.116QPCh. 18 - Prob. 18.117QPCh. 18 - A galvanic cell using Mg/Mg2+ and Cu/Cu2+...Ch. 18 - Prob. 18.119QPCh. 18 - Prob. 18.120QPCh. 18 - Lead storage batteries arc rated by ampere-hours,...Ch. 18 - Use Equations 14.10 and 18.3 to calculate the emf...Ch. 18 - Prob. 18.123QPCh. 18 - A 9.00 102 mL amount of 0.200 M MgI2 solution was...Ch. 18 - Prob. 18.125QPCh. 18 - Which of the components of dental amalgam...Ch. 18 - Calculate the equilibrium constant for the...Ch. 18 - Prob. 18.128QPCh. 18 - Prob. 18.129QPCh. 18 - Prob. 18.130QPCh. 18 - Prob. 18.131QP
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