问题
问答题 简答题
请说出中和滴定指示剂测定法测定白酒中的总酯量的原理。
答案
参考答案：
先用碱中和白酒中的游离酸，再加入一定量的碱使用权酯皂化，过量的碱再用酸进行反滴定，以酚酞为指示剂指示终点。
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请说出中和滴定指示剂测定法测定白酒中的总酯量的原理。
参考答案：
先用碱中和白酒中的游离酸，再加入一定量的碱使用权酯皂化，过量的碱再用酸进行反滴定，以酚酞为指示剂指示终点。
| 用方框中所给单词的适当形式填空，使短文通顺、正确、连贯（每个单词限用一次）。 | |
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| Manners are important in every country, but people have different 1 bout their manners. What is good in one country may not be 2 in another. Chinese people are 3 to know the fact that an Englishman doesn’t stop to talk and shake hands with his friend in the street. They just say hello 4 each other and then pass on. English people think 5 we Chinese end our visits to friends all of a sudden. They usually begin to 6 that they want to go 15 or 20 minutes before they leave their 7 house. And they do this two or three 8 within 20 minutes. It is important 9 people to understand each other. Here is a 10 , "When in Rome, do as the Romans do." |