13.106 A piece of magnesium ribbon and a copper wire are partially immersed in a 0.1 M HCI solution in a beaker. The metals are joined externally by another piece of metal wire. Bubbles are seen to evolve at both the Mg and Cu surfaces. (a) Write equations representing the reactions occurring at the metals. (b) What visual evidence would you seek to show that Cu is not oxidized to Cu2+? (c) At some stage, NaOH solution is added to the beaker to neutralize the HCI. Upon further addition of NaOH, a white precipitate forms. What is it?

13.106 A piece of magnesium ribbon and a copper wire are partially immersed in a 0.1 M HCI solution in a beaker. The metals are joined externally by another piece of metal wire. Bubbles are seen to evolve at both the Mg and Cu surfaces. (a) Write equations representing the reactions occurring at the metals. (b) What visual evidence would you seek to show that Cu is not oxidized to Cu2+? (c) At some stage, NaOH solution is added to the beaker to neutralize the HCI. Upon further addition of NaOH, a white precipitate forms. What is it?

Chemistry

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ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Electrolysis

Electrolysis is defined as the process of breaking down ionic compounds into their constituent elements by passing a direct electric current through the compound in a fluid state. The cathode reduces cations, while the anode oxidizes anions. An electrolyte, electrodes, and some form of external power source are the main components required for conducting electrolysis. A partition, such as an ion-exchange membrane or a salt bridge, may also be used, but this is optional. These are primarily used to prevent the products from diffusing near the opposing electrode.

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13.106 A piece of magnesium ribbon and a copper wire are
partially immersed in a 0.1 M HCl solution in a
beaker. The metals are joined externally by another
piece of metal wire. Bubbles are seen to evolve at
both the Mg and Cu surfaces. (a) Write equations
representing the reactions occurring at the metals.
(b) What visual evidence would you seek to show
that Cu is not oxidized to Cu²*? (c) At some stage,
NaOH solution is added to the beaker to neutralize
the HCI. Upon further addition of NaOH, a white
precipitate forms. What is it?

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