<P> As an example, a Daniell cell consists of a zinc anode (an electron collector), is oxidized as it dissolves into a zinc sulfate solution, the dissolving zinc leaving behind its electrons in the electrode according to the oxidation reaction (s = solid electrode; aq = aqueous solution): </P> <Dl> <Dd> Z n (s) → Z n (a q) 2 + + 2 e − (\ displaystyle \ mathrm (Zn_ ((s)) \ rightarrow Zn_ ((aq)) ^ (2 +) + 2e ^ (-) \)) </Dd> </Dl> <Dd> Z n (s) → Z n (a q) 2 + + 2 e − (\ displaystyle \ mathrm (Zn_ ((s)) \ rightarrow Zn_ ((aq)) ^ (2 +) + 2e ^ (-) \)) </Dd> <P> The zinc sulfate is the electrolyte in that half cell . It is a solution which contains zinc cations Z n 2 + (\ displaystyle \ mathrm (Zn) _ () ^ (2 +)), and sulfate anions S O 4 2 − (\ displaystyle \ mathrm (SO) _ (4) ^ (2 -) \) with charges that balance to zero . </P>

What is the si unit of electromotive force