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English Translations » 化工分析圈 » 【Daily Question】Chemical Analysis Edition 2019.11.15

【Daily Question】Chemical Analysis Edition 2019.11.15

2019-11-15View Original

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This post was last edited by zjp on 2019-11-15 09:50. Multiple-choice question: A solution mainly contains Ca2+, Mg2+, along with small amounts of Al3+ and Fe3+. When triethanolamine is added at pH=10, and then EDTA is used for titration with chromotropic acid T as an indicator, what is measured? ( ) A. The content of Mg2+ B. The contents of Ca2+ and Mg2+ C. The contents of Al3+ and Fe3+ D. The contents of Ca2+, Mg2+, Al3+, and Fe3+ B
Reply #22019-11-15
B, Ca2+, Mg2+ contents
Reply #32019-11-15
B, Ca2+, Mg2+ contents
Reply #42019-11-15
B, Ca2+, Mg2+ contents
Reply #52019-11-15
B, Ca2+, Mg2+ contents
Reply #62019-11-16
C, Al3+, Fe3+ contents

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Translated at 2026-07-23 10:38:44

Original: https://bbs.hcbbs.com/thread-2850105-1-1.html

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