Ch 23sec1

CH 23 Electrochemistry 23.1 Electrochemical cells

Types of electrochemical cells ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Voltaic cells ,[object Object],[object Object],[object Object],[object Object]

Voltaic cells ,[object Object],[object Object],[object Object]

Spontaneous Reactions ,[object Object]

Voltaic Cell ,[object Object],[object Object]

Voltaic cells Cu 2+ + Zn (s) Cu (s) + Zn 2+ Zn Cu Cu 2+ Zn 2+ e - e - Electrons are transferred from one half-cell to the other using an external metal conductor.

Voltaic cells e - e - To complete the circuit, a salt bridge is used salt bridge

Voltaic cells ,[object Object],[object Object],KCl Cl - K + Cl - is released to Zn side as Zn is converted to Zn 2+ K + is released as Cu 2+ is converted to Cu

Voltaic cells For our example, we have zinc ion being produced. This is an oxidation so: The electrode is - the anode - is positive (+). “ AN OX” Zn Zn 2+ + 2e -

Voltaic cells For our other half cell, we have copper metal being produced. This is a reduction so: The electrode is - the cathode - is negative (-) “ RED CAT” Cu 2+ + 2e - Cu

Cell diagrams ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Dry Cell ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Lead Storage Battery ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Lead Battery ,[object Object],[object Object]

Fuel Cell ,[object Object],[object Object],[object Object],[object Object]

Fuel Cell ,[object Object],[object Object],[object Object]

Ch 23sec1

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Ch 23sec1