氧化还原反应中实际上包含氧化和还原两个过程.下面是一个还原过程的反应式:2NO3-+10H++8e→N2O+5H2O KMnO4、Na2CO3、Cu2O、Fe2(SO4)3四种物质中的一种物质(甲)能使上述还原过程发生.(1

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