Rebirth of Xueba's sweet wife

Chapter 106 Sister Kills You Instantly With Eggshells [1]

Rewards and punishments have been clearly defined, and the game officially begins.

Kong Qiuzhen pushed the instrument that Bei Kehan ​​had wiped just now to the front of the podium for display, showing a very satisfied smile.

"That's how it should be! Many people think that the most important thing to do a chemical experiment is the steps. In my opinion, it's completely wrong! The most important thing is the attitude! Attitude! The attitude towards details! Look at this test tube wiper, How clean! It's like... just like a surgeon treats his own scalpel!!! You can't see a speck of dust! Perfect! That's how it should be..."

After Mr. Kong talked about the importance of "attitude" to chemistry for half an hour, the game finally started.

Mr. Kong first took out a bottle of blue solution and asked everyone: "What is this?"

Blue, clear to translucent, without precipitation...

There is a lot of blue liquid!How can you guess this...

When everyone was worrying, Zhou Qing stood up first, forgot to raise her hand, and said loudly: "This is copper chloride solution!"

"Isn't copper chloride green?..." Someone asked in a low voice.

However, Mr. Kong nodded and affirmed Zhou Qing's answer.

Zhou Qing glanced at Bei Kehan ​​triumphantly, with a look of "what, you came so long early and fiddled with the equipment for a long time, you still don't have my sharp eyesight!".

Bei Kehan ​​leaned on the back of the chair, looking straight ahead.

She didn't care about Zhou Qing's provocation at all.

Everyone praised:
"Wow - I can see it so quickly, you are indeed the representative of the chemistry class..."

"It's still Zhou Qing's quick reaction. After the copper chloride is diluted, it turns blue. Why didn't I remember it..."

Zhou Qing looked like she had the chance to win, waiting for the next question.

She felt that Mr. Kong was nothing more than that, the solution he brought out was so common, and the questions he asked would not be too difficult, and with her quick reflexes, Bei Kehan ​​must have lost nothing!
After distributing the solution to each student, Kong Qiuzhen said with a smile: "Today's game is simple to say, it is to see who can extract pure copper from copper chloride."

Wow! ——

Everyone fried the pan at once.

"So it's that simple!"

"Oh, I'm worrying for nothing. I don't dare to participate in the competition. I'm afraid I will lose the test tube for a month!"

Someone couldn't help shouting: "Mr., you can use iron powder!"

Kong Qiuzhen still smiled and said: "Well, the method is arbitrary, and the materials required are not limited. However, the rules of the game are to use the least time, the least amount of added materials and auxiliary tools to obtain the purest and most copper. You win. How about it, boys, is it fun?"

As soon as this remark came out, no one dared to say it simply.

Least time, least material, most purest copper...

This request...is too difficult! ! !

Speaking of the replacement purification method that everyone can think of, such as adding iron powder, not only iron powder is needed to make it, but just adding equipment requires glass rods, funnels, iron stands, filter paper, beakers, etc... ...To make it more pure, hydrochloric acid is added to remove excess iron powder.

Therefore, there are very few who dare to raise their hands to fight.

Except for Zhou Qing's high-profile stretched arms, there were only 3 boys who came to join in the fun with the attitude of giving it a try.

Oh, I almost forgot, in the corner, there was Bei Kehan, who had been silent all this time, raising his little hand in a low-key way.

(End of this chapter)