The super scholar system becomes a scholar in one second

Chapter 424 The Effect of Potassium Permanganate

"Professor Qin, the materials you want." The assistant said with a smile
"Thank you." Qin Luo nodded in thanks, took a bottle of concentrated sulfuric acid from the trolley, poured it into a beaker, then put it in an ice water bath, and stirred slowly. After a while, Qin Luo picked up 100 grams of graphite powder and 1 gram of The sodium nitrate solid mixture was poured slowly.

"Student Qin, did you put too much graphite powder?" Seeing Qin Luo's movements, Li Min's forehead was slightly wrinkled, and his face was a little dignified.

As the director of the laboratory, he is naturally not a vase. Li Min himself is a double professor of physical chemistry. He has prepared graphene more than once through the oxidation-reduction method, and he knows the whole preparation process clearly.

But like Qin Luo now, it is the first time he has seen the method of pouring so much graphite powder at one time and only adding a small amount of sodium nitrate solid mixture.

Can a 100:1 ratio cause a chemical reaction?

"Not much, I even think it's a little less." Qin Luo smiled slightly, poured the remaining 100 grams of graphite powder into it, and then used a magnetic rod to continuously stir the beaker.

"..." Seeing this incredible operation method, Li Min was completely speechless.

Sure enough, theory is theory, and practice is practice. Even those who put forward the theory may not be able to succeed.

Thinking of this, Li Min waved to his assistant again: "Go to the warehouse and grab some graphite powder."

"En." The assistant nodded and was about to turn around, but the next second, he froze in place.

Qin Luo picked up potassium permanganate while stirring the beaker, and poured it into the beaker!

At this moment, everyone including Li Min's eyes widened!

Before everyone recovered from their bewilderment, the beaker had already started to boil, and the bubbles started to come out non-stop. At this moment, everyone's hearts also boiled.

They knew that the most critical moment had come. If Qin Luo could keep the reaction temperature at 90-98° and maintain it, then he would be able to produce graphene!
But how to maintain the temperature has become the first problem to be solved at present.

"What will he do?" Li Min narrowed his eyes, staring at Qin Luo, or staring at his hands.

He wanted to see what kind of material Qin Luo would add.

It was too late to say, but it was fast at that time. When the reaction was about 5 minutes long, Qin Luo, who had been waiting for a long time, finally moved. He took the H2O2 reducing oxidant from the shelf.

H2O2 reduces the oxidizing agent!
Li Min's eyes were scarlet and his whole body trembled violently. Qin Luo's choice was beyond his expectation once again!

Under the surprised eyes of everyone, Qin Luo picked up the H2O2 reducing oxidant and poured it into the beaker.

The beaker boiled again, and the thermometer on the side showed that the reaction temperature in the beaker was as high as 98 degrees at this moment!
This is the most important temperature for the reaction!
1 minute, 2 minutes, 10 minutes, half an hour!

As soon as the reaction temperature dropped, Qin Luo picked up tweezers, clamped the mouth of the beaker, and washed it with dilute hydrochloric acid solution and deionized water at a volume ratio of 1:10 until no sulfuric acid was detected in the filtrate.

At this moment, at the bottom of the beaker, a layer of graphene looms.

He succeeded!

He successfully prepared graphene through oxidation-reduction reaction, and it seems that the quality is not bad!

Seeing this scene, Li Min couldn't restrain the horror in his heart.
(End of this chapter)