4 – (Unimontes -MG)Os potenciais padrões de redução das reações de semipilha do chumbo (Pb) e alumínio (Al) são dados abaixo: Montando-se uma pilha eletroquímica com eletrodos de Pb e de Al, pode-se afirmar que: a) o fluxo de elétrons é no sentido de Al --> Pb b) a força eletromotriz da pilha é -1,54V. c) o alumínio funciona como ponte de salina. d) o chumbo é mais facilmente oxidado. e) a reação não é espontânea
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4 – (Unimontes -MG)Os potenciais padrões de redução das reações de semipilha do chumbo (Pb) e alumín...
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