将氢电极（p H2 =100kpa）插入纯水中与标准氢电极组成原电池,则Emf为

题目

将氢电极（p H2 =100kpa）插入纯水中与标准氢电极组成原电池,则Emf为

答案

浓差电池.纯水中 [H+]=10^-7 mol/L; P(H2)=100 kPa =100/101.325 大气压Emf=E(H2)- Eo(H2)={Eo(H2)+0.02858log([H+]^2/P(H2))}-Eo(H2)=0.02958log([H+]^2/P(H2))=0.02958log(101.325x10^-14/100)Emf =0.02958log(1.0...