【Daily Question】December 21, 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 financial rewards to users. 【Daily Question】 The color change range of methyl orange is ( ), and it is commonly used as an indicator in the acid titration of bases; the end point of the titration is reached when it turns red at ( ). Standard: 3.1–4.4, Yellow. For your replies to the posts, you will earn +2 wealth points for participating in the quizzes; if you answer all questions correctly, you’ll get an additional +3 to +8 wealth points. If you provide a thorough analysis and explanation of the questions or your responses (including detailed calculation processes), you will receive extra wealth points as a reward. If your answers are correct and your analysis and explanations are accurate, your reply will be marked as the best reply (or the best assistance). Feel free to answer the questions.
The color change range of methyl orange is (3.1–4.4); it is commonly used as an indicator in the acid titration of bases, with the endpoint being reached when the color changes from yellow to red.
3.1～4.4, changing from yellow to orange
PH3.1-4.4------------Yellow
3.1-4.4 Yellow to Red