【Weekly Question】Participate from 8/21 to 8/27, 2017 for +2 wealth； +3 to +10 wealth for correct answers

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To increase the popularity of the chemical analysis section, a \"Question of the Week\" campaign has been launched to foster an active atmosphere for technical exchanges while providing rewards in the form of financial benefits to users. 【Weekly Question】Multiple-choice question: The labeled concentration of the NaOH solution is 0.300 mol/L. This solution has absorbed a small amount of CO2 from the air. Now, it is standardized using standard HCl solution with phenolphthalein as an indicator. The resulting standardized concentration is ( ) compared to the labeled concentration. A. Higher; B. Lower; C. Unchanged; D. Unable to determine. Answer: B. Reply with your answer in the comments to participate; you will receive +2 points. Those who get all answers correct will receive an additional +3 to +8 points. Extra points 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 best assistance). Feel free to answer the questions.