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Ch.19 - Electrochemistry
McMurry - Chemistry 8th Edition
McMurry8th EditionChemistryISBN: 9781292336145Non è quello che usi tu?Cambia libro di testo
Tutti i libri di testoMcMurry 8th EditionCh.19 - ElectrochemistryProblema 121a
Capitolo 19, Problema 121a

A storm has knocked out power to your beach house, and you would like to build a battery from household items to charge your iPhone. You have the following materials. alum in the kitchen, which can be used to make a 1.0 M Al3+ solution bleach, which is a solution that is approximately a 1.0 M in ClO-aluminum foil, a platinum necklace and bologna, which can be used as a salt bridge (a) What are the half-reactions and overall reaction in the battery?

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Identify the possible redox pairs from the materials available: Al/Al^{3+} and ClO^-/Cl_2.
Write the oxidation half-reaction: Al \(\rightarrow\) Al^{3+} + 3e^-.
Write the reduction half-reaction: ClO^- + 2H_2O + 2e^- \(\rightarrow\) Cl_2 + 4OH^-.
Balance the electrons between the oxidation and reduction half-reactions by multiplying the oxidation half-reaction by 2 and the reduction half-reaction by 3.
Combine the balanced half-reactions to write the overall redox reaction.

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Electrochemical Cells

Electrochemical cells convert chemical energy into electrical energy through redox reactions. They consist of two electrodes: an anode where oxidation occurs and a cathode where reduction takes place. Understanding how these cells function is crucial for determining the half-reactions and overall reaction in a battery setup.
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02:46
Electrochemical Cells

Half-Reactions

Half-reactions represent the individual oxidation and reduction processes occurring in an electrochemical cell. Each half-reaction shows the transfer of electrons and the change in oxidation states of the reactants. Identifying these half-reactions is essential for balancing the overall reaction and understanding the flow of electrons in the battery.
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01:49
First-Order Half-Life

Salt Bridge

A salt bridge is a component of an electrochemical cell that maintains electrical neutrality by allowing the flow of ions between the two half-cells. It typically contains a gel or solution of an inert electrolyte. In this scenario, using bologna as a salt bridge helps facilitate ion movement, which is vital for the battery's operation.
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Ionic Salts
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Domanda del libro di testo

You are on your dream vacation at the beach when a major storm knocks out the power for days. Your cell phone is dead, and you want to make a battery to charge it. You find the following materials in the beach house. blue stone algaecide for pools, which can be used to make a 1.0 M Cu2+ solution alum in the kitchen, which can be used to make a 1.0 M Al3+ solution aluminum foil, copper wire, and bologna, which can be used as a salt bridge. (d) An iPhone requires 5.0 V for charging. Can this battery charge the phone? Explain.

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Domanda del libro di testo

A storm has knocked out power to your beach house, and you would like to build a battery from household items to charge your iPhone. You have the following materials. alum in the kitchen, which can be used to make a 1.0 M Al3+ solution bleach, which is a solution that is approximately a 1.0 M in ClO-aluminum foil, a platinum necklace and bologna, which can be used as a salt bridge (b) What voltage can be generated?

290
views
Domanda del libro di testo

You are on your dream vacation at the beach when a major storm knocks out the power for days. Your cell phone is dead, and you want to make a battery to charge it. You find the following materials in the beach house. blue stone algaecide for pools, which can be used to make a 1.0 M Cu2+ solution alum in the kitchen, which can be used to make a 1.0 M Al3+ solution aluminum foil, copper wire, and bologna, which can be used as a salt bridge. (b) What voltage can be generated?

363
views
Domanda del libro di testo

A storm has knocked out power to your beach house, and you would like to build a battery from household items to charge your iPhone. You have the following materials. alum in the kitchen, which can be used to make a 1.0 M Al3+ solution bleach, which is a solution that is approximately a 1.0 M in ClO-aluminum foil, a platinum necklace and bologna, which can be used as a salt bridge (d) An iPhone requires 5.0 V for charging. Can this battery charge the phone? Explain.

1
views