O Faradayových zákonech elektrolýzy platí:
Správná odpověď je: A, C
První Faradayův zákon elektrolýzy říká, že hmotnost látky vyloučené při elektrolýze z elektrolytu m je přímo úměrná náboji Q (), který prošel elektrolytem, tedy
.
V uvedeném vzorci figuruje celkový náboj prošlý elektrolytem a elektrochemický ekvivalent látky A, což je konstanta úměrnosti charakterizující danou látku. Jednotkou elektrochemického ekvivalentu látky je [A] = kg · C–1, která vyjadřuje hmotnost látky vyloučenou z elektrolytu při průchodu náboje o velikosti 1 C (coulomb). Druhý Faradayův zákon elektrolýzy slouží k výpočtu elektrochemického ekvivalentu A dané látky, neboť říká, že elektrochemický ekvivalent látky A je roven podílu molární hmotnosti látky Mm a Faradayovy konstanty F spolu s počtem elektronů ν potřebných k vyloučení jedné molekuly látky z elektrolytu, tedy .
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