CHEM105 Study Guide - Final Guide: Electronegativity, Equilibrium Constant, Membrane Potential

139 views4 pages

peachkangaroo394

11 Apr 2016

School

University of Alberta

Department

Chemistry

Course

CHEM105

Professor

Yoram Apelblat

For unlimited access to Study Guides, a Grade+ subscription is required.

burgundyzebra53 and 61 others unlocked

CHEM105 Full Course Notes

Verified Note

15 documents

Document Summary

Reduction-oxidation reactions are electron transfer reactions: these two steps occur simultaneously. Reduction: gaining of electrons, oxidizing agent. Oxidation: loss of electrons, reducing agent. Oxidation state: the change in the imaginary charge the atom would have, if all the valence electrons in the bonds are assigned to the more electronegative atom in a molecule or ion. Then connect the half cell by a salt bridge that passes ions and a wire attached to the electrodes to complete the circuit: cations go to the cathode; anions go to the anode. Cell potential (ecell: the driving force of a galvanic cell is the voltage difference between 2 half cells, also called the voltage of the cell or electromotive force, ecell > 0. The more positive it is, the more work the cell can do: ecell = 0. Reaction has reached equilibrium and the cell can do no more work: ecell < 0.

Related Questions

A voltaic cell is constructed using the reaction

(a) Write equations for the oxidation and reduction half-reactions.

(b) Which half-reaction occurs in the anode compartment, and which occurs in the cathode compartment?

(c) Complete the following sentences: Electrons in the external circuit flow from the ________ electrode to the ______ electrode. Negative ions move in the salt bridge from the ______ half-cell to the ______ half-cell. The half-reaction at the anode is ____, and that at the cathode is _____.

whitemosquito349

A voltaic cell is constructed using the reaction

a. Write equations for the oxidation and reduction half-reactions.

b. which half-reaction occurs in the anode compartment and which half-reaction occurs in the cathode compartment

c. Complete the following sentences: Electrons in the external circuit flow from the ___ electrode to the ___ electrode. Negative ions move in the salt bridge from the ___ half-cell to the ___ half-cell. The half-reaction at the anode is ___ and that at the cathode is ___.

lilackoala446

A voltaic cell is constructed using the reaction

a. Write equations for the oxidation and reduction half-reactions.

b. Which half-reaction occurs in the anode compartment and which occurs in the cathode compartment?

c. Complete the following sentences:

Electrons in the external circuit flow from the ____ electrode to the ___ electrode. Negative ions move in the salt bridge from the ___half-cell to the _half-cell. The half-reaction in the anode is __ and the half-reaction in the cathode is ___

lilacant875

CHEM105 Study Guide - Final Guide: Electronegativity, Equilibrium Constant, Membrane Potential

CHEM105 Full Course Notes

Document Summary

Get access

Related textbook solutions

Chemistry: Structure and Properties

Basic Chemistry

Principles of Chemistry Molecular Approach

Principles of Chemistry Molecular Approach

Chemistry: Structure and Properties

Chemistry: A Molecular Approach

Chemistry: A Molecular Approach

Principles of Chemistry: A Molecular Approach

Chemistry: The Central Science

Related Documents

CAS CH 102 Lecture Notes - Lecture 6: Redox, Electrolytic Cell, Electrochemistry

CHM135H1 Chapter Notes - Chapter 18: Galvanic Cell, Reduction Potential, Electrochemical Cell

CHEM 1062 Chapter Notes - Chapter 21: Oxidizing Agent, Half-Reaction, Electrolytic Cell

Related Questions