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【Daily Question】Chemical Analysis Edition, 10.16.2021

2021-10-16View Original

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In direct complexometric titration, at the endpoint, the color exhibited by the solution is generally either A, the color of the complex formed between the metal ion being analyzed and EDTA; B. The color of the complex formed between the metal ion under test and the indicator ; C. Color of the free indicator ; D. The mixed color of the complex between metal ions and the indicator and the complex between metal ions and EDTA. C

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