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Question:

Is an electrochemical equivalent the same as an equivalent mass?

I need to find the electrochemical equivalent of copper metal. I found the equivalent mass to be equal to 32.44 grams by electrolysis, and I researched the actual number to be 31.75 grams. Is this the same as the electrochemical equivalent of copper? What would I need to do to get the electrochemical equivalent.

Answer:

The difficulty with equivalent is that you must specifiy what reaction type is being considered. For redox and electrochemical reactions the equivalent mass provides one mole or consumes one mole of electrons. Copper usually is either the metal Cu(0) or the dipositive ion Cu(+2). So one mole of copper will give or consume two moles of electrons and the equivalent mass will be half the atomic mass, this is the value of 31.75 g. Your electrolysis result just has some (unavoidable) experimental error. Don't get upset. all measurements have some error.
English? Do you recommend their equipment of length? The English, traditionally, used the Imperial equipment. As instruments, those have been for mass the pound, for volume the gallon and for length the inch. at the instant, they have switched to the Metric equipment, which makes use of kilograms for mass, litres for volume, and meters for length.

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