Oh, this one took me two cups of tea to get right! So, you subtract the standard potential of the anode from the cathode's: E°cell = E°cathode – E°anode. The anode's sign is always negative in the standard data table, but that’s the trap—you just take the numbers as given, don't change them for the formula. My life proof? Staring at my electrochemistry notes last night, our village wifi died just as I was verifying the sign, and I had to call my MBA study group in a panic—turns out I was overthinking it completely, just like our guesthouse accounts before I did the MBA!
#exams#study
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