【Daily Question】Jan 2, 2016: Participation +2 Wealth； +3 to 8 wealth for correct answers
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This post was last edited by zjp on 2016-1-4 at 08:20. 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) What can be used to directly prepare standard solutions? A KMnO4(A.R.) B K2Cr2O7(A.R.) C Na2S2O3·5H2O(A.R.) D NaOH(A.R.) Correct answer: B. Reply with your answer in the comments; you will receive +2 points for participating in the quiz. If you answer all questions correctly, you’ll get an additional +3 to +8 points. Those who provide thorough analyses and explanations for the questions or answers, or who include detailed calculation processes, will receive extra points as a reward. 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.
What can be used to directly prepare standard solutions is (B). A KMnO4(A.R.) B K2Cr2O7(A.R.) C Na2S2O3·5H2O(A.R.) D NaOH(A.R.)
D NaOH(A.R.)
What can be used to directly prepare standard solutions is (B).
What can be used to directly prepare standard solutions is (C). A KMnO4(A.R.) B K2Cr2O7(A.R.) C Na2S2O3·5H2O(A.R.) D NaOH(A.R.)
B K2Cr2O7(A.R.)
That which can be used to directly prepare standard solutions is (B) K2Cr2O7(A.R.).
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