Skip to main content
Ch.20 - Electrochemistry
Tro - Chemistry: A Molecular Approach 5th Edition
Tro5th EditionChemistry: A Molecular ApproachISBN: 9780134874371Non è quello che usi tu?Cambia libro di testo
Tutti i libri di testoTro 5th EditionCh.20 - ElectrochemistryProblema 47d
Capitolo 20, Problema 47d

Consider the voltaic cell:
Diagram of a galvanic cell showing anode, cathode, and salt bridge with ion flow directions.
d. Indicate the direction of anion and cation flow in the salt bridge

Guida verificata passo dopo passo
1
Identify the anode and cathode in the voltaic cell. In this diagram, Pb is the anode and Ag is the cathode.
Recall that oxidation occurs at the anode and reduction occurs at the cathode. Therefore, Pb is oxidized to Pb2+ and Ag+ is reduced to Ag.
Understand that the salt bridge is used to maintain electrical neutrality by allowing the flow of ions between the two half-cells.
Determine the direction of ion flow: anions (negative ions) will flow towards the anode to balance the positive charge of the Pb2+ ions formed, and cations (positive ions) will flow towards the cathode to balance the negative charge of the electrons gained by Ag+ ions.
Conclude that in this voltaic cell, anions flow from the salt bridge to the anode compartment, and cations flow from the salt bridge to the cathode compartment.

Risposta video verificata per un problema simile:

Questa soluzione video è stata consigliata dai nostri tutor come utile per risolvere questo problema.
Durata del video:
53s

Concetti chiave

Ecco i concetti essenziali che devi comprendere per rispondere correttamente alla domanda.

Voltaic Cell

A voltaic cell, also known as a galvanic cell, is an electrochemical cell that converts chemical energy into electrical energy through spontaneous redox reactions. It consists of two half-cells, each containing an electrode and an electrolyte. The anode is where oxidation occurs, while the cathode is where reduction takes place, allowing for the flow of electrons through an external circuit.
Video consigliato:
Percorso guidato
01:21
The Electrolytic Cell

Salt Bridge

The salt bridge is a crucial component of a voltaic 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, which facilitates the movement of anions and cations. This movement helps to balance the charge as electrons flow through the external circuit, preventing the buildup of charge that would otherwise halt the reaction.
Video consigliato:
Percorso guidato
00:50
Ionic Salts

Ion Flow Direction

In a voltaic cell, the direction of ion flow in the salt bridge is determined by the reactions occurring at the electrodes. Cations move towards the cathode to balance the negative charge created by the reduction of metal ions, while anions flow towards the anode to counteract the positive charge generated by oxidation. Understanding this flow is essential for predicting the behavior of the cell and ensuring its proper function.
Video consigliato:
Percorso guidato
06:17
Ion Formation
Pratica correlata
Domanda del libro di testo

Use line notation to represent each electrochemical cell in Problem 43.

945
views
Domanda del libro di testo

Sketch a voltaic cell for each redox reaction. Label the anode and cathode and indicate the half-reaction that occurs at each electrode and the species present in each solution. Also indicate the direction of electron flow. a. Ni2+(aq) + Mg(s) → Ni(s) + Mg2+(aq)

2319
views
1
rank
Domanda del libro di testo

Make a sketch of the voltaic cell represented by the line notation. Write the overall balanced equation for the reaction and calculate E°cell. Sn(s) | Sn2+(aq) || NO(g) | NO3–(aq), H+(aq) | Pt(s)

890
views
1
rank
Domanda del libro di testo

Calculate the standard cell potential for each of the electro- chemical cells in Problem 43.

1088
views