30.00cm^3 of a 0.2M EDTA solution is added to 20.00cm^3 of an
Fe3+ solution. The excess EDTA is then back-titrated with a 0.1M
Pb2+ solution. 15.68cm^3 of the Pb2+ soluion is consumed. What
is the concentration of the Fe3+ solution?
Iron(III)-EDTA Complex
2011-11-08 1:16 am
回答 (1)
2011-11-09 1:03 am
✔ 最佳答案
Fe^3+(aq) + EDTA^2-(aq) → [Fe-EDTA]^+(aq)Pb^2+(aq) + EDTA^2-(aq) → [Pb-EDTA]^+(aq)
Let y M be the concentration of Fe^3+.
(No. of moles of Fe^3+) + (No. of moles of Pb^2+) = (No. of moles of EDTA)
y(20.00/1000) + 0.1*(15.68/1000) = 0.2*(30.00/1000)
y = 0.2216
Concentration of Fe^3+ = 0.2216 M
參考: andrew.tam
收錄日期: 2021-04-13 18:20:36
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20111107000051KK00476