Redox reactions

• Oxidation Is Loss
• Reduction Is Gain

any device in which chemical energy can be converted to electrical energy or vice versa

• Redox is spontaneous and exothermic
• oxidation and reduction occur in 2 separate cells
• Battery

• redox reaction is non spontaneous and endothermic
• both oxidation and reduction in 1 cell
• used for electrolytic reduction, electroplating

• oxidation
• electrons are lost
• Voltaic - negative
• (VAN Voltaic Anode is Negative)
• Electrolytic - positive
• (APE - Anode Positive in ELectrolytic)

• Reduction
• Electrons gained
• Voltaic - cathode is positive   
• electrolytic - cathode is negative

• Battery provides energy needed for nonspontaneous reaction.
• When switch is closed, electrical energy will force oxidation and reduction reactions to occur.
• At the Anode, Ag loses e- and becomes Ag⁺
• At the cathode, Ag⁺ gains e- and becomes Ag. The silver is coated onto the spoon.