【Daily Question】Chemical Engineering Principles 562: EDTA Titration (May 23)
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This post was last edited by Zaihui Kangqiao on 2017-5-23 07:57. The Chemical Engineering Theory section is launching a \"One Question per Day\" activity starting today, aimed at helping everyone reinforce their basic knowledge in chemical engineering. Subsequent series will include those on \"Principles of Chemical Engineering\", \"Mass Transfer and Separation\", \"Thermodynamics in Chemical Engineering\", and \"Chemical Process Engineering\". We hope for your active support~~~ Replies to the \"One Question per Day\" activity can be viewed directly at **; the thread will be closed after 1 day! ! To encourage everyone’s continued participation this year! Participation earns 3 wealth points, with an additional 4 wealth points for correct answers~~~ Short answer: When using the EDTA titration method to determine the hardness of condensate water, a gray-green endpoint color often appears; what type of interference is this indicating, and why is it necessary to use a masking agent? Iron ions cause significant interference
When determining the hardness of condensate water using the EDTA titration method, a gray-green endpoint color often appears, which indicates what kind of interference is present and why a masking agent is needed? Iron ions
This indicates that iron ions cause significant interference. A masking agent needs to be added.