1.Consider the scenario: A student accidently reverse the leads of the digital m

Question

1.Consider the scenario: A student accidently reverse the leads of the digital multimeter and use the black lead on the copper half-cell and the red on the zinc, magnesium and iron half-cells. How the measured Ecell and the calculated Ered for the zinc, magnesium and iron half-cells would be affected?

2.Batteries can use several voltaic cells connected in series. Then, the voltage of the battery is the sum of the Ecell of all the voltaic cells are being used. Based on your measurements, what combinations of the electrochemical cells that you measured, would you use to create a battery of 6V?

Explanation / Answer

1. Every dignified multimeter uses red for positive and black for negative.Now, if we switch the leads, we will just get the negative value of Ecell measured. The Ered will also get negative due to switching.

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