【Daily Question】December 27, 2015 – Participate to earn +2 wealth； +3 to 8 wealth for correct answers
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This post was last edited by zjp on 2015-12-29 at 11:38. To increase the popularity of the chemical analysis section, a \"One Question per Day\" campaign has been launched; this aims to foster active technical exchanges while also providing financial rewards to users. 【Daily Question】 (Single-choice question) When determining Pb2+ using complexometric titration, the simplest method to eliminate the interference of Ca2+ and Mg2+ is ( ). A. Coordination masking method B. Controlled acidity method C. Precipitation separation method D. Demasking method. Correct answer: B. Reply with your answer in the comments; participating in the quiz earns you +2 wealth points. Those who get all answers correct receive an additional +3 to +8 wealth points. Extra rewards will be given for thorough analyses and explanations of the questions or answers, or for detailed calculation processes. If your answer is correct and your analysis is accurate, it will be marked as the best reply (or the best assistance). Feel free to answer the questions. Note: We will close this post after 24 hours, and at that time we will announce the best reply (the best assistance), as well as the answer and explanation.
When determining Pb2+ by complexometric titration, the simplest method to eliminate the interference of Ca2+ and Mg2+ is (B). A Coordination masking method B Controlled acidity method C Precipitation separation method D Deposition method
I believe the correct answer to this question should be A.
When determining Pb2+ by complexometric titration, the simplest method to eliminate the interference of Ca2+ and Mg2+ is (B). A Coordination masking method B Controlled acidity method C Precipitation separation method D Deposition method
When determining Pb2+ by complexometric titration, the simplest method to eliminate the interference of Ca2+ and Mg2+ is (B) the acidity control method.
When determining Pb2+ by complexometric titration, the simplest method to eliminate the interference of Ca2+ and Mg2+ is (B). A Coordination masking method B Controlled acidity method C Precipitation separation method D Deposition method
When determining Pb2+ by complexometric titration, the simplest method to eliminate the interference of Ca2+ and Mg2+ is (B). A Coordination masking method B Controlled acidity method C Precipitation separation method D Deposition method
When determining Pb2+ by complexometric titration, the simplest method to eliminate the interference of Ca2+ and Mg2+ is (B). A Coordination masking method B Controlled acidity method C Precipitation separation method D Deposition method