What mass of chromium could be deposited from a solution of Cr3+ (aq) using a current of 10.0 A for 180 minutes? (Mc = 52.00 g/mol) А. 2.16 g В. 6.47 g С. 19.4 g D. 58.2 g

Chemistry & Chemical Reactivity
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Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
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Chapter19: Principles Of Chemical Reactivity: Electron Transfer Reactions
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Problem 47PS: In the electrolysis of a solution containing Ni2+(aq), metallic Ni(s) deposits on the cathode. Using...
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What mass of chromium could be deposited from a solution of
Cr3+ (aq) using a current of 10.0 A for 180 minutes? (Mc = 52.00
g/mol)
Cr
А. 2.16 g
B. 6.47 g
С. 19.4 g
D. 58.2 g
Transcribed Image Text:What mass of chromium could be deposited from a solution of Cr3+ (aq) using a current of 10.0 A for 180 minutes? (Mc = 52.00 g/mol) Cr А. 2.16 g B. 6.47 g С. 19.4 g D. 58.2 g
Expert Solution
Step 1

Q = IT = 10 A * 10800 sec = 108000 C

Q / F = 108000 / 96500 = 1.119 mole e-

This is a 3 electron process as Cr is in +3 oxidation state.

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