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plz explain with examples

2007-02-04 21:36:13 · 16 answers · asked by Anonymous in Science & Mathematics Chemistry

16 answers

these are electrodes(they look like rods)attached to the positive terminal(anode) or the negative terminal(cathode)of a battery
eg
in the electro-purification of copper,
electrolyte is copper sulphate
anode is impure copper
cathode is pure copper
also at the anode negatively charged compounds are obtained whereas at the cathode positively charged compuonds are obtained

2007-02-04 21:43:29 · answer #1 · answered by parth s 1 · 0 0

An electrode in an electrochemical cell is referred to as either an anode or a cathode, words that were also coined by Faraday. The anode is now defined as the electrode at which electrons Leave the cell and oxidation occurs, and the cathode as the electrode at which electrons enter the cell and reduction occurs. Each electrode may become either the anode or the cathode depending on the voltage applied to the cell. A bipolar electrode is an electrode that functions as the anode of one cell and the cathode of another cell.

2007-02-05 01:37:43 · answer #2 · answered by sobysandy 1 · 1 0

An anode is an electrode through which electric current flows into a polarised electrical device.

It follows from this universal definition that in a galvanic cell, the anode is the negative electrode, where conventional current flows inwards. This inwards current is carried externally by electrons moving outwards, negative charge moving one way amounting to positive current flowing the other way. It is continued internally by positive ions moving into the electrolyte. In an electrolytic cell, the anode is the positive terminal, which receives current from an external generator. In a diode, it is the terminal at the tail of the arrow symbol, where current flows into the device.

An electrode through which current flows the other way (out) is a cathode.

2007-02-04 21:47:21 · answer #3 · answered by Kboo 1 · 0 0

Anode and Cathode are two electrodes in which anions in the solution are moved towards anode and cations in the solution are moved towards catode. In brief cathode has -ve charge and anode has +ve charge

2007-02-05 00:41:13 · answer #4 · answered by kanakeswarao 1 · 0 0

An anode is an electrode through which electric current flows into a polarised electrical device.

It follows from this universal definition that in a galvanic cell, shown as an illustrative example, the anode is the negative electrode, where conventional current flows inwards. This inwards current is carried externally by electrons moving outwards, negative charge moving one way amounting to positive current flowing the other way. It is continued internally by positive ions moving into the electrolyte. In an electrolytic cell, the anode is the positive terminal, which receives current from an external generator. In a diode, it is the terminal at the tail of the arrow symbol, where current flows into the device.

A cathode is an electrode through which electric current flows out of a polarised electrical device.

It follows from this universal definition that in a galvanic cell, shown as an illustrative example, the cathode is the positive electrode, where conventional current flows outwards. This outwards current is carried internally by positive ions leaving the electrolyte. It is continued externally by electrons moving inwards, negative charge moving one way amounting to positive current flowing the other way. In an electrolytic cell, the anode is the negative terminal, which sends current back to the external generator. In a diode, it is the terminal at the pointed end of the arrow symbol, where current flows out of the device

2007-02-04 21:53:55 · answer #5 · answered by Anonymous · 0 0

What Are Anodes

2016-10-16 06:52:57 · answer #6 · answered by ? 4 · 0 0

hi shruti
anode & cathodes are both electrodes but there is a difference dear.cathode is the negatively charged electrode where the positive ions or cations deposit after electrolysis whereas anode is the positively charged electrode where the negative ions or anions deposit after electrolysis.For example: during the electrolysis of leadbromide, the positively charged ions of lead discharge at cathode whereas the negatively charged ions of bromine discharge at anode.I hope u've understood.
bye

2007-02-04 22:01:49 · answer #7 · answered by Sapna 1 · 0 0

there is a vessel known as electrolytiic cell in which an ionic compound can be broken into ions by passage of electricity.in this vessel cathode n anode are attached.cathode is negatively charged while anodi is positively charged.these attract anion n cations respectively.these r usually made of carbon

2007-02-06 18:46:25 · answer #8 · answered by IYER S 2 · 0 0

(in electrolysis) the electrode that is conncted to the negative pole of the battery that is the called cathode .

the electrode connected to the positive pole of the battery is the anode .
e.g.platinum(Pt) is a cathode& anode in electrolysis of water .

2007-02-04 21:47:28 · answer #9 · answered by genius 1 · 0 0

http://encarta.msn.com/encnet/refpages/search.aspx?q=anode+and+cathode&Submit2=Go
when u connect electrodes to a cell, the electrode connected to the +ve termianl is the anode and negative the cathode

2007-02-04 21:52:19 · answer #10 · answered by sushobhan 6 · 0 0

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