【Daily Question】January 19, 2016: Participation = +2 Wealth； +3 to 8 wealth for correct answers
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This post was last edited by zjp on 2016-1-21 at 09:47. 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) Which of the following is the correct drying condition for a primary standard? ( ) A. H2C2O4·2H2O is placed in an empty desiccator. B. NaCl is placed in an empty desiccator. C. Na2CO3 is placed in an electric oven at 105–110°C. D. Potassium hydrogen phthalate is placed in an electric oven at 500–600°C. Correct answer: A. Reply with your answer; participating in the quiz earns you +2 points, and getting all answers correct adds another +3–8 points. Those who provide thorough analyses or detailed calculation processes for the questions and answers will receive additional 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.
Which of the following drying conditions for reference substances is correct? ( ) Potassium hydrogen phthalate D in an electric oven at 500–600°C
A. H2C2O4·2H2O is placed in an empty desiccator.
A H2C2O4·2H2O is placed in an empty desiccator~~~~~~~~~~~~~~
A H2C2O4·2H2O is placed in an empty desiccator
The correct drying conditions for the following primary standards are (B). A H2C2O4·2H2O is placed in an empty desiccator. B NaCl is placed in an empty desiccator. C Na2CO3 is placed in an electric oven at 105–110°C. D Potassium hydrogen phthalate is placed in an electric oven at 500–600°C