評論
打印
Hi, I'm Jessica
嗨，我是Jessica
and today I'm gonna be talking about a chemical demonstration called
今天我要講的化學演示叫作
the Briggs-Rauscher reaction
Briggs-Rauscher反應
This reaction was discovered by 2 San Francisco area high school chemistry teachers
這一反應的發現者是兩位舊金山地區高中化學教師
Briggs and Rauscher
Briggs和Rauscher
who are working in the lab
他們在實驗室
to come up with a visually striking way to demonstrate
得到了這種視覺上很引入注目的
an oscillating clock reaction
振蕩時鐘反應
Let's watch MIT's Dr. John Dolhun show us the reaction
來看看MIT的John Dolhun博士如何演示該反應
Here he is at the Cambridge Science Festival
這是他在劍橋科學節上的照片
OK, so what I'm gonna do is I'm gonna pour 3 colorless solutions into this beaker
我將把這三種無色溶液倒入燒杯中
Solution number one
第一種溶液
and I'm going to use kitchen chemistry
我將使用廚房化學方法
So I'm using my eye here
我將使用我的眼睛
Let me just see. OK, there we are
我看看，好了
Second solution
第二種溶液
And the third solution
第三種溶液
So what happened?
到底是怎么回事
Dr. Dolhun mixed 3 clear colorless solutions together
Dolhun博士混合了三種無色透明溶液
The first solution contains potassium iodate and sulfuric acid dissolved in water
第一種溶液是碘酸鉀和硫酸的水溶液
The second solution is malonic acid and manganese sulphate monohydrate in water
第二種溶液是丙二酸和一水硫酸錳的水溶液
And the third is hydrogen peroxide in water
第三種溶液是過氧化氫的水溶液
And when mixed together, things get complicated
混合在一起時，反應會非常復雜
The overall reaction is this
總的反應是這樣的
