made by shalini yadav 8 b on chemical effects of electric current

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PowerPoint Presentation:

Chemical Effects Of Electric Current

PowerPoint Presentation:

CONTENTS Chemical Effects Of Electric Current Electrolysis Electrolysis Of Water Uses Of Electrolysis Electroplating

Chemical Effects Of Electric Current:

Chemical Effects Of Electric Current When electric current passes through a conducting solution, it causes chemical reactions. This is called chemical effect of electric current. Chemical effect of electric current may cause :- Formation of gas bubbles at the electrodes. Deposit of metal on the electrodes. Change in colour of the solution.

PowerPoint Presentation:

ELECTROLYSIS THE PRODUCTION OF A CHEMICAL REACTION BY PASSING AN ELECTRICAL CURRENT THROUGH AN ELECTROLYTE IS CALLED ELECTROLYSIS. ELECTROLYTE CONTAINS IONS. THE POSITIVELY CHARGED IONS ARE CALLED CATIONS BECAUSE THEY ARE ATTRACTED TO CATHODE ,AND NEGATIVELY CHARGED IONS ARE CALLED ANIONS AS THEY GET ATTRACTED TO ANODE.

Electrolysis Of Water:

Electrolysis Of Water When electric current is passed through water, it splits up into hydrogen and oxygen. This is called electrolysis of water. When electric current is passed through water oxygen gas bubbles are produced at the electrode connected to the positive terminal of the battery and hydrogen gas bubbles are produce at the electrode connected to the negative terminal of the battery.

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USES OF ELECTROLYSIS IT IS USED IN INDUSTRY FOR PRODUCTION OF MANY METALS AND NON-METALS. IT IS USED TO COAT ONE METAL WITH ANOTHER WHICH IS ALSO KNOWN AS ELECTROPLATING. IT IS USED IN REFINING OF IMPURE METALS ALSO KNOWN AS ELECTROREFINING.

Electroplating:

Electroplating The process of depositing a layer of any desired metal on another material by means of electricity is called electroplating. E.g. :- For electroplating of copper on an object, the object is dipped in acidified copper sulphate solution and connected to the negative terminal of a battery. A copper strip is dipped in the solution and connected to the positive terminal of the battery. When electric current is passed through the solution, copper from the copper strip is deposited on the object.

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Made by Shalini Yadav Class VIII B * T H E E N D *

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