某稀溶液中含有 4molKNO3 和 2.5molH2SO4 ,向其中加入 1.5molFe ,充分反应(已知 NO3−被还原为 NO ),最终溶液体积为 1L 。下列说法正确的是( )
A. 反应后生成 NO 的体积为 33.6L (标况)
B. 所得溶液中 c(Fe2+):c(Fe3+)=1:2
C. 所得溶液中 c(NO3−)=2.75mol⋅L−1
D. 所得溶液中的溶质只有 FeSO4
B
Key Concept
Redox reaction stoichiometry and mole ratio
Explanation
In the reaction between Fe and HNO3, Fe is oxidized to Fe2+ and Fe3+, while NO3− is reduced to NO. The balanced redox reaction will show the mole ratio of Fe2+ to Fe3+, which is 1:2, assuming all Fe reacts.