【Daily Question】September 1, 2016: Participation +2 Wealth； +3 to +10 wealth for correct answers
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To increase the popularity of the chemical analysis section, a \"One Question per Day\" campaign has been launched to foster an active atmosphere for technical exchanges while also providing rewards in the form of financial benefits to users. 【Daily Question】 (Single-choice question) A NaOH standard solution containing Na2CO3 is standardized using methyl orange as an indicator. This standard solution is then used to titrate a certain acid with phenolphthalein as the indicator. The resulting measurement value will be ( ) A. Too high B. Too low C. Unchanged D. Unable to determine. Correct answer: A. Please reply with your answer; participating in the quiz earns you +2 points, and those who get all answers correct receive an additional +3 to +8 points. Those who provide a thorough analysis or detailed calculation process for the question or answer will receive extra points as well. If your answer is correct and your analysis is accurate, it will be marked as the best reply. Feel free to answer the questions.
A. On the high side, because the carbonic acid that is formed is prone to decomposition and is a weak acid, this results in an increased volume of titrant used, thereby raising the pH value.