Why is the voltmeter connected in series in electrolysis?

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In electrolysis involving a galvanic cell, the voltmeter is connected in series to measure the voltage across the external circuit accurately. This configuration allows the voltmeter to capture the potential difference created by the flow of electrons from the more reactive metal to the less reactive one. Despite having high resistance, the voltmeter does not significantly affect the overall current in the circuit due to its design, which minimizes its impact on electron flow. Connecting the voltmeter in series ensures that it measures the total voltage drop across the entire circuit, providing a true representation of the electrochemical reaction. Understanding this setup is crucial for accurate voltage measurements in electrolysis experiments.
lokifenrir96
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Hi guys,

I was wondering, in the process of electrolysis when we are looking at a galvanic CELL, meaning a battery, why is it that when we want to measure the voltage caused by using the two metals of different elements, we connect the voltmeter in series to the external circuit?

If you don't really know what I'm talking about, just imagine a galvanic cell: 2 half cells, 2 different elemental metals dipped in solution in both half cells. Electrons flow from more reactive (more lilely to undergo oxidation) to less reactive, through the external circuit. Why is the voltmeter connected in series to the external circuit?

I thought voltmeters have infinitely high resistance? Wouldn't this affect the flow of electrons?

Thank you!
 
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