9.5.1 Describe, using a diagram, the essential components of an electrolytic cell IB Chemistry SL

The diagram should include the source of electric current (normally a battery or DC source) and conductors (wires — which are unchanged by the passage of electricity), positive and negative electrodes (made from graphite or platinum) , and the electrolyte (insulator as solid, conductor as a liquid/aqueous and decomposed by electricity).

Give the sign of the electrodoes and the reaction that occurs at each for both voltaic and electrolytic cells.?

Question by : Give the sign of the electrodoes and the reaction that occurs at each for both voltaic and electrolytic cells.?
Can you please help me!?!?! I really need your help. If you could answers this as soon as possible that would help!!!!

Best answer:

Answer by pisgahchemist
Remember this: “A red cat ate an ox” (A pisgahchemist original)
REDuction occurs at the CATthode, OXidation occurs at the ANode

This is true regardless of the direction of flow of electrons, in other words, whether it is electrolytic or voltaic (galvanic).

The word “anode” (from the Greek for “the way in”) was developed for Michael Faraday to describe the electrode where the conventional current came from as it entered the substance to be electrolyzed.

The word “cathode” was also developed for Faraday and means “the way out” and was used to describe the electrode where the conventional current left the substance being electrolyzed.

Conventional current is the hypothetical flow of positive charge and is the opposite of electron flow.

Anions were defined as the ions that were attracted to the anode in an electrolytic cell. Cations were defined as the ions attracted to the cathode in an electrolytic cell.

The signs of the anode and cathode can be tricky. In an electrolytic cell a voltage is applied to the electrodes. The positive side of the power supply is attached to the anode, and the negative side to the cathode. In a voltaic cell, a “battery”, the positive electrode is the cathode and the negative electrode is the anode.

The best way to think of anode and cathode is in terms of oxidation and reduction. That works regardless of the electron flow direction.

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Electrolytic Cell – 1 Electrode Pair

This was a project for Alternative Fuels class. It was an attempt to create a hydrogen generator, for the purpose of providing a spark-ignition engine with a partial mixture of hydrogen gas. The video shows partial completion of the cell, containing one electrode pair. The finished cell is planned to have 8 pairs in series. The electrolyte is tap water (treated lake source) and sodium hydroxide (lye).

Do cations move to the cathode and anions to the anode in all electrochemical cells or just electrolytic?

Question by annie: Do cations move to the cathode and anions to the anode in all electrochemical cells or just electrolytic?
I know that oxidation occurs at the anode and reduction at the cathode for all types of electrochemical cells, but I’m not sure about the migration of cations and anions?

Best answer:

Answer by TLV ×
A widespread misconception is that anode polarity is always positive (+). This is often incorrectly inferred from the correct fact that in all electrochemical devices negatively charged anions move towards the anode (hence their name) and/or positively charged cations move away from it. In fact anode polarity depends on the device type, and sometimes even in which mode it operates, as per the above electric current direction-based universal definition. Consequently, as can be seen from the following examples, in a device which consumes power the anode is positive, and in a device which provides power the anode is negative

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Say Electrolytic Injection not HHO generator Brown’s gas


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