【Daily Question】Chemical Analysis Edition, 2019.9.17
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This post was last edited by zjp on 2019-9-17 08:05. Multiple-choice question: Once the chromic acid cleaning solution loses its oxidizing capacity due to use, it can be heated to remove the water content, after which ( ) can be added. Once the reaction is complete, the precipitate can be filtered out and the solution can then be used again. A. Ferrous sulfate B. Potassium permanganate powder C. Iodine D. Hydrochloric acid B
After use, the oxidizing capacity of the chromic acid cleaning solution decreases to the point where it can no longer be used. It can be heated to remove the water content, after which (B) is added; once the reaction is complete, the precipitate is filtered out and the solution can be used again. A. Ferrous sulfate B. Potassium permanganate powder C. Iodine D. Hydrochloric acid – Strong oxidizing agents