Explanation Given: Unbalanced reaction: Cr 2 O 7 2 − + Cu → Cr 3+ +Cu 2+ Molarity of K 2 Cr 2 O 7 = 0.850 M Mass of Cu = 5.25 g 1. Divide the equation into two halves namely the oxidation half and the reduction half. Reduction half (since is going from +6 to +3 oxidation state) Cr 2 O 7 2 − → Cr 3 + Oxidation half (since Cu is going from 0 to +2 oxidation state) Cu → Cu 2+ 2. Balance all the elements in the equation except for O and H. Reduction half Cr 2 O 7 2 − → 2 Cr 3+ Oxidation half Cu → Cu 2+ 3. Balance the oxygen atoms by adding the appropriate number of water () molecules to that side of half reaction which lacks oxygen atoms. Reduction half Cr 2 O 7 2 − → 2 C r 3 + + 7 H 2 O Oxidation half Cu → Cu 2+ 4. Balance the hydrogen atoms (including those added in step 2 to balance the oxygen atom) by adding H + ions to that side of half reaction which lacks in hydrogen atoms. Reduction half Cr 2 O 7 2 − + 1 4 H + → 2Cr 3+ +7H 2 O Oxidation half Cu → Cu 2+ 5...

Chemistry: Structure and Properties (2nd Edition)

2nd Edition

ISBN: 9780134293936

Author: Nivaldo J. Tro

Publisher: PEARSON

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Chapter 19, Problem 100E

Interpretation Introduction

To determine:

The volume of a 0.850 M K₂Cr₂O₇ required to completely react with 5.25 g of Cu and balance the given reaction.

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Chapter 19, Problem 99E

Chapter 19, Problem 101E

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Chapter 19 Solutions

Chemistry: Structure and Properties (2nd Edition)

Ch. 19 - Prob. 1E Ch. 19 - Explain the difference between a voltaic (or...Ch. 19 - Prob. 3E Ch. 19 - Prob. 4E Ch. 19 - Prob. 5E Ch. 19 - Prob. 6E Ch. 19 - What is the definition of the standard cell...Ch. 19 - Describe the basic features of a cell diagram (or...Ch. 19 - Why do some electrochemical cells employ inert...Ch. 19 - Describe the standard hydrogen electrode (SHE) and...

Ch. 19 - How is the cell potential of an electrochemical...Ch. 19 - Prob. 12E Ch. 19 - Prob. 13E Ch. 19 - How can Table 19.1be used to predict whether or...Ch. 19 - Explain why Ecell , Grxn , and K are all...Ch. 19 - Does a redox reaction with a small equilibrium...Ch. 19 - How does Ecell depend on the concentrations of the...Ch. 19 - Prob. 18E Ch. 19 - What is a concentration electrochemical cell?Ch. 19 - What are the anode and cathode reactions in a...Ch. 19 - What are the anode and cathode reactions in a...Ch. 19 - Prob. 22E Ch. 19 - What is a fuel cell? 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Mn Al Ni...Ch. 19 - Use tabulated electrode potentials to calculate...Ch. 19 - Use tabulated electrode potentials to calculate...Ch. 19 - Prob. 63E Ch. 19 - Calculate the equilibrium constant for each of the...Ch. 19 - Calculate the equilibrium constant for the...Ch. 19 - Prob. 66E Ch. 19 - Calculate Grxn and Ecell for a redox reaction with...Ch. 19 - Prob. 68E Ch. 19 - Prob. 69E Ch. 19 - Prob. 70E Ch. 19 - Prob. 71E Ch. 19 - Prob. 72E Ch. 19 - Prob. 73E Ch. 19 - Prob. 74E Ch. 19 - Prob. 75E Ch. 19 - Consider the concentration cell: Label the anode...Ch. 19 - Prob. 77E Ch. 19 - Prob. 78E Ch. 19 - Prob. 79E Ch. 19 - Prob. 80E Ch. 19 - Refer to the tabulated values of Gf in Appendix...Ch. 19 - Refer to the tabulated values of Gf in Appendix...Ch. 19 - Prob. 83E Ch. 19 - Prob. 84E Ch. 19 - Prob. 85E Ch. 19 - Prob. 86E Ch. 19 - Prob. 87E Ch. 19 - Which products are obtained in the electrolysis of...Ch. 19 - Write equations for the half-reactions that occur...Ch. 19 - Which products are obtained in the electrolysis of...Ch. 19 - Prob. 91E Ch. 19 - Write equations for the half-reactions that occur...Ch. 19 - Prob. 93E Ch. 19 - Prob. 94E Ch. 19 - Prob. 95E Ch. 19 - Silver can be electroplated at the cathode of an...Ch. 19 - A major source of sodium metal is the electrolysis...Ch. 19 - Prob. 98E Ch. 19 - Prob. 99E Ch. 19 - Prob. 100E Ch. 19 - Consider the molecular view of an AL strip and...Ch. 19 - Consider the molecular view of an electrochemical...Ch. 19 - Prob. 103E Ch. 19 - Prob. 104E Ch. 19 - The cell potential of this electrochemical cell...Ch. 19 - Prob. 106E Ch. 19 - Prob. 107E Ch. 19 - Consider the reaction shown here occurring at...Ch. 19 - Prob. 109E Ch. 19 - What voltage can theoretically be achieved in a...Ch. 19 - A battery relies on the oxidation of magnesium and...Ch. 19 - A rechargeable battery is constructed based on a...Ch. 19 - If a water electrolysis cell operates at a current...Ch. 19 - Prob. 114E Ch. 19 - Prob. 115E Ch. 19 - Prob. 116E Ch. 19 - Calculate Grxn and K for each reaction. 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The volume of a 0.850 M K 2 Cr 2 O 7 required to completely react with 5.25 g of Cu and balance the given reaction.

Solution Summary: The author calculates the volume of a 0.850 M K 2 Cr 2 O 7 required to react with 5.25 g of Cu and balance the given reaction.

To determine:

The volume of a 0.850 M K₂Cr₂O₇ required to completely react with 5.25 g of Cu and balance the given reaction.

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Chapter 19 Solutions

The volume of a 0.850 M K 2 Cr 2 O 7 required to completely react with 5.25 g of Cu and balance the given reaction.

Solution Summary: The author calculates the volume of a 0.850 M K 2 Cr 2 O 7 required to react with 5.25 g of Cu and balance the given reaction.

To determine: The volume of a 0.850 M K2Cr2O7 required to completely react with 5.25 g of Cu and balance the given reaction.

Want to see the full answer?

Chapter 19 Solutions

To determine:

The volume of a 0.850 M K₂Cr₂O₇ required to completely react with 5.25 g of Cu and balance the given reaction.