ELECTROPLATING OF METALSELECTROPLATING OF METALS

ELECTROPLATING OF IRONELECTROPLATING OF IRON

ELECTROPLATING OF COPPERELECTROPLATING OF COPPER

EXERCISEEXERCISE

CONCLUSION

CURRICULUM

ACCU

( - ) ( + )

ANODE CATHODE

Electrolyte solution

QUITQUIT

BY HARIYANTO SMA NEGERI 3 MALANG

BY HARIYANTOBY HARIYANTO

INTRODUCTION

ELECTROPLATINGELECTROPLATING

LESSON PLANLESSON PLAN

STANDARD OF COMPETENCY :To understand oxidation and reduction reaction and

electrochemistry cell and also its application in technology and daily life

Basic competency :To observe redox reaction in electrolysis cell and apply faraday’s law

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Indicator :

To write electrolysis reaction in electroplating of metalsPurposes :The audiences are able to :

understand the process of electroplating

describe how to plate metal by other metal

arrange materials and substances of electroplating

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Electrochemistry is the branch of chemistry that studies about change of electrical energy to chemical energy or change of chemical energy to electrical energy

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Electrochemistry :

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Electrochemistry cell :

Electrochemistry cell is cell that change the electrical energy to chemical energy or change the chemical energy to electrical energyExamples:

ACCUMULATORACCUMULATOR BATTERYBATTERY ELECTROPLATING CELLELECTROPLATING CELL

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ELECTROCHEMISTRYELECTROCHEMISTRY CELLCELL

VOLTA CELL ELECTROLYSIS CELL

Canges the chemical energy to electrical energy

Ex : accu, battery

Canges the electrical energy to chemical energy

Ex : electroplating cell

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REDOX REACTIONREDOX REACTION

OXIDATION REDUCTION

Atom/substance releases electron

Ex : Au (atom) Au3+(ion) + 3e

Atom/subtance gains electron

Ex : Au3+(ion) + 3e Au (atom)

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Definition of electroplatingElectroplating is process to plate metal by other metal with electrolysis

Purpose of electroplating

The purposes of electroplating are protecting metal of corrosion and making performance of metal better

Examples:

We plate iron by chromium to make the iron resists corosion

We plate copper ring by gold to make the ring looks better

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Arrangement of electroplating equipment

ACCU

( - ) ( + )

ANODE

Electrolyte solution

CATHODE

switch

Source of electricity

SOURCE OF ELECTRICITY

CABLE

ANODE

CATHODE

SWITCH

ELECTROLYTE SOLUTION

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GOLD COPPER

CLICK ON

ANODE CATHODE

( + )( - )

OFF

Solution of AuCl3

ACCU

ELECTROPLATING OF COPPERELECTROPLATING OF COPPER

ON

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GOLD COPPER

Click circleClick circle

ANODE CATHODE

( + )

ACCU

OFF

Cl-

Cl-

Au3+

Au3+

Cl-

Cl-

Cl- Cl-

( - ) CLICK OFF

ELECTROPLATING OF COPPERELECTROPLATING OF COPPER

ON

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GOLD COPPER

CLICK ON

ANODE CATHODE

( + )( - )

OFF

Solution of AuCl3

ACCU

ELECTROPLATING OF COPPERELECTROPLATING OF COPPER

ON

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ANODE OF GOLD

ion of Au 3+

Electron

Notes :

Atom of Au

Ion of Cl -

Back

Gold ( Anoda ) : Au(s) Au3+(Aq) + 3e ( oxidation )

REACTION:

ANODANODEE( ( OXIDATION REACTIONOXIDATION REACTION ) )

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CATHODE OF COPPER

Ion of Au 3+

Electron

Notes

Atom of Au

Ion of Cl -

Back

Copper ( Cathoda ) : Au(s) ( Reduction )Au3+(Aq) + 3e

REACTION :

CCATATHHODODEE (REDU (REDUCTION REACTIONCTION REACTION ) )

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CLICK ON( + )( - )

OFF

ACCU

Anode Perak

Katode

Besi

ON

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