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what is an emf value or wht indicates emf value

give explanation in detail

6 years ago


Answers : (1)


The electromotive force (EMF) is the maximum potential difference between two electrodes of a galvanic or voltaic cell. This quantity is related to the tendency for an element, a compound or an ion to acquire (i.e. gain) or release (loss) electrons. For example, the maximum potential between Zn and Cu of a well known cell Zn (s) | Zn2+ (1 M) || Cu2+ (1 M) | Cu (s) has been measured to be 1.100 V. A concentration of 1 M in an ideal solution is defined as the standard condition, and 1.100 V is thus the standard electromotive force, DEo, or standard cell potential for the Zn-Cu galvanic cell.

6 years ago

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