【Daily Question】December 26, 2015 – Participation +2 Wealth； +3 to 8 wealth for correct answers

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This post was last edited by zjp on 2015-12-28 08:34. 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) In the KMnO4 method for determining the Ca content in lime, Ca is first precipitated as CaC2O4; after filtration and washing, it is dissolved in H2SO4. Finally, KMnO4 is used to titrate H2C2O4. What is the basic unit of Ca? A Ca B 1/2Ca C 1/5Ca D 1/3Ca. The correct answer is B. Reply with your answer in the comments; you will receive +2 wealth points for participating in the quiz. If you get all answers correct, you’ll get an additional +3 to +8 wealth points. Those who provide thorough analyses and explanations for the questions or answers, or who include detailed calculation processes, will receive extra wealth points as a reward. If your answer is correct and your analysis/explanation 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.