Determining direction of flow
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Re: Determining direction of flow
Convention is to write anion (oxidation) on the left and cation (reduction) on the right. Therefore left to right means anion to cation.
Re: Determining direction of flow
The oxidation reaction (e.g. Zn ---> (Zn^2+) + (2 e^-) in the cell diagram Zn|Zn^2+||Cu^2+|Cu) in the anode releases electrons that flow via a circuit to the cathode where the reduction reaction ((Cu^2+) + (2 e^-) ---> Cu in the cell diagram Zn|Zn^2+||Cu^2+|Cu) takes place.
Re: Determining direction of flow
Yes, I believe electrons always move from the anode to the cathode.
Re: Determining direction of flow
Because the direction of flow is always from anode (negative charge) to cathode (positive charge) and the anode is always on the left while the cathode is on the right, the direction that the electron flows is always from left to right.
Re: Determining direction of flow
the flow will go from left to right as it goes from anode to cathode, and another way to look at it is that it is going from negative charge to positive charge
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Re: Determining direction of flow
If the direction is reversed, does G become positive? And what is this reverse case named, if the normal is a battery?
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Re: Determining direction of flow
Eesha Sohail 1D wrote:If the direction is reversed, does G become positive? And what is this reverse case named, if the normal is a battery?
I think batteries are Galvanic cells and happen when G is negative. When G is positive the reaction becomes nonspontaneous and is called an electrolytic cell.
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Re: Determining direction of flow
Electrons always flow from the reaction that is losing electrons (i.e. oxidation), which occurs at the anode, to the reaction that is gaining electrons (i.e. reduction), which occurs at the cathode.
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Re: Determining direction of flow
Electrons always flow from the anode to the cathode, or from left to right.
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Re: Determining direction of flow
ursulavictorino1K wrote:Why does the reaction always go from the anode to the cathode?
Electrons always flow from loss of electrons (oxidation, occurs at the anode) to the side where electrons are gained (reduction, occurs at the cathode).
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Re: Determining direction of flow
The cell diagram always has the anode on the left and the cathode to the right to demonstrate this, so the electrons would move from the anode to the cathode
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