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: Structures and Properties, Books a la Carte Plus MasteringChemistry with eText -- Access Card Package

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ISBN: 9780321974617

Author: Nivaldo J. Tro

Publisher: PEARSON

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Chapter 20, Problem 100E

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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 20, Problem 99E

Chapter 20, Problem 101E

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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 20 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 20 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.