阿Q吧 > 1mol·l-1cuso4溶液中，除去含有少量的fe3+杂质，则ph应在什么范 围

1mol·l-1cuso4溶液中，除去含有少量的fe3+杂质，则ph应在什么范 围

2025-03-25 19:08:11
推荐回答（1个）
回答1：

Cu(OH)2的ksp=2.2*10^-20，Fe(OH)3的 ksp=1.1*10^-36，[Fe3+]<10^-5molL-,可以说Fe3+完全沉淀

Ksp=[Cu2+][OH-]^2=1x[OH-]^2=2.2*10^-20
[OH]=1.48x10^-10，PH=4.17
Ksp=[Fe3+][OH-]^3=10^-5x[OH-]^3=1.1*10^-36
[OH]=4.9x10^-11，PH=3.7
所以PH在3.7—4.17间

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