【Daily Question】December 25, 2015: Participation +2 Wealth； +3 to 8 wealth for correct answers
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This post was last edited by zjp on 2015-12-27 08:22. 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 using sodium oxalate as a benchmark to standardize the potassium permanganate standard solution, the reaction rate is slow at first; later on, the reaction rate increases significantly. This is due to the catalytic effect of （ ）. A H+ B MnO4－ C Mn2+ D CO2 Standard answer: C. Post your answer in the replies; answering correctly earns you +2 wealth points, while getting all answers right grants an additional +3 to +8 wealth points. Those who provide thorough analyses and explanations for the questions or answers, or include detailed calculation processes, will receive extra wealth rewards. 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.
C, Mn2+————–——–——–––––––
When using sodium oxalate as a standard to calibrate the potassium permanganate standard solution, the reaction rate is slow at first; later on, the reaction rate increases significantly. This is due to the catalytic effect of (C). A H+ B MnO4－ C Mn2+ D CO2
When using sodium oxalate as a standard to calibrate the potassium permanganate standard solution, the reaction rate is slow at first; later on, it increases significantly. This is due to the catalytic effect of (C).
When using sodium oxalate as a standard to calibrate the potassium permanganate standard solution, the reaction rate is slow at first; later on, the reaction rate increases significantly. This is due to the catalytic effect of (C). A H+ B MnO4－ C Mn2+ D CO2
When using sodium oxalate as a standard to calibrate the potassium permanganate standard solution, the reaction rate is slow at first; later on, it increases significantly. This is due to the catalytic effect of (C).
When using sodium oxalate as a standard to calibrate the potassium permanganate standard solution, the reaction rate is slow at first; later on, it increases significantly. This is due to the catalytic effect of (D). A H+ B MnO4－ C Mn2+ D CO2
When using sodium oxalate as a standard to calibrate the potassium permanganate standard solution, the reaction rate is slow at first; later on, the reaction rate increases significantly. This is due to the catalytic effect of (C). A H+ B MnO4－ C Mn2+ D CO2