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5 Sep 2018

14. What is the coefficient in front of Cu(s) when the following reaction is balanced? Cu(s) + HNO3(aq) - Cu2+ (aq) + NO(g) a) 0 b) 1 c) 2 d) 3 e) 5

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Related questions

A galvanic cell consists of an Ag(s)|Ag+(aq) half-cell and a Cu(s)|Cu2+(aq) half-cell connected by a salt bridge. Reduction occurs in the silver half-cell. The cell can be represented in standard notation as

A. Ag(s)|Ag+(aq)|Cu(s)|Cu2+(aq)

B. Cu(s)|Cu2+(aq)||Ag+(aq)|Ag(s)

C. Cu2+(aq)|Cu(s)||Ag(s)|Ag+(aq)

D. Ag+(aq)|Ag(s)||Cu(s)|Cu2+(aq)

E. Cu(s)|Cu2+(aq)||Ag(s)|Ag+(aq)

Determine if HNO3(aq) can dissolve each metal sample.

Standard Electrode Potentials at 25 ∘C
Reduction Half-Reaction E∘(V)
NO3−(aq)+4H+(aq)+3e− →NO(g)+2H2O(l) 0.96
Au3+(aq)+3e− →Au(s) 1.50
Cu2+(aq)+2e− →Cu(s) 0.34
Sn2+(aq)+2e− →Sn(s) -0.14

A) Write a balanced chemical reaction showing how the 4.11 g Sn dissolves in HNO3(aq).

B) Determine the minimum volume of 6.1 molL−1 HNO3(aq) required to completely dissolve the sample.

Assume that you want to carry out a sequence of cycle reactions based on 1.00 g of copper.

How many grams of copper(II)oxide will form when the third step of the cycle goes to completion?

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