Briggs-Rauscher反应是有名的化学振荡反应.两位高中教师Thomas Briggs和Warren Rausc

少花钱多办事2022-10-04 11:39:541条回答

Briggs-Rauscher反应是有名的化学振荡反应.两位高中教师Thomas Briggs和Warren Rauscher在1973年发明了这个仿佛魔术一般的反应组合.
根据Wikipedia中刊载的标准描述,实验开始前实验者们将几种清澈的液体混合在一起,当通过震动触发反应时无色的溶液将会缓慢变为琥珀色,突然又变为深蓝色,又逐渐变为无色,不断重复大约十次,最后结束时溶液呈现深蓝色并带有很重的碘酒气味.
这一系列变化的原理是第一次反应所生成的化学物质能够继续激发第二个反应,以及如此不断的反复反应,直到所有的化学反应都结束.
他是用什么溶液的?什么原理...
谁能完成的解释下.最好有实验步骤!

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七泉山共回答了17个问题 | 采纳率94.1%: 视频中的应该是碘和淀粉的颜色,然后这些过量的碘与溶液中的氢氧化钾KOH或碘化钾KI反应生成三碘化钾而失去颜色,而溶液中的过氧化氢又把这些三氧化钾氧化掉,生成碘单质,然后颜色又出来了.不知道,都没有说,忘了.再看一次视频.; 1年前

Alfred Briggs was serving a thirty-year sentence in prison f Alfred Briggs was serving a thirty-year sentence in prison for stealing jewe 以此为开头的文章, vv33781年前1: 妮-娟共回答了24个问题 | 采纳率83.3%

Alfred Briggs was a prisoner in a high security jail,serving a thirty year sentence.In his youth he had been famous for robbing jewellery stores all over the country.Even after he was arrested,tried and sentenced,Alfred had kept his secrets and no one had ever discovered where the jewels were hidden.He was married and his wife,Sally,sent him regular letters about everyday problems at home.Alfred knew for a fact that his letters were opened and read by the authorities,but still he enjoyed receiving the news from home.
One day Alfred was given a letter from his wife.He opened it and read,'Dear Alfred,I've decided to plant some potatoes in the back garden near to the white fence.When do you think is the best time for potatoes to be planted?'
Alfred wrote this in reply,'Dear Sally,You can plant potatoes in two or three weeks' time,but whatever you do,don't plant them in the back garden.This is very important!Please don't plant them there!'
A week later,Alfred was given another letter from his wife.'Dear Alfred,You won't believe this!Last week ten policemen arrived at the house and dug up all of the back garden.'
Alfred wrote back,'Dear Sally,Now is the best time to plant potatoes.'

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Mr. Briggs got a job with an insurance company(保险公司) after h Mr. Briggs got a job with an insurance company(保险公司) after he left school and went around visiting people in their homes to sell them life insurance. One day, after he had been working for the company for about a year, the insurance manager sent for him and said, “Mr. Briggs, I have been looking at your record as a salesman with our company, and there is one thing that surprises me about it. Why have you been selling insurance only to people over 95 years old, and why have you been giving them such generous（宽厚的）conditions? You’ll ruin our company if you go on like that.” “Oh, no, sir,” answered Mr. Briggs at once, “Before I started work, I looked at the figures(数字) for deaths in this country during the past ten years, and I can tell you that few people die at the age of 95.” 小题1: Before he worked in an insurance company, what was Mr. Briggs?______. A．He was a worker. B．He was an official. C．He was a student. D．He was a businessman. 小题2:The word “ruin” in the second paragraph means . A．lose B．break C．leave D．destroy 小题3: Which of the following is true according to the passage? A．Mr. Briggs had studied the figures for deaths for several years. B．Mr. Briggs began to look at the figures after he started work. C．A great number of very old people die every year. D．The number of the very old people who died every year is small. mrwch1年前1: gg员小A 共回答了23个问题 | 采纳率82.6%

小题1:C
小题2:D
小题3:D

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Briggs-Rauscher反应是有名的化学振荡反应.两位高中教师Thomas Briggs和Warren Rausc

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