Konoha Feige

Zhao and He returned to Lujiang College, found a restaurant, had a simple meal, and then parted reluctantly.

Zhao Shuqin found a hotel to stay near Lujiang College.Because he was so tired, Zhao Shuqin fell asleep as soon as he lay down.In the haze, there was suddenly a rapid knock on the door.Zhao Shuqin was awakened.He quickly got up and ran over to open the door. It turned out that several policemen were standing at the door.One of them showed his police officer ID and asked seriously, are you Zhao Shuqin.Zhao Shuqin nodded quickly and said yes.The police officer said, you are suspected of committing a crime, please follow us to the police station for investigation.After saying that, Zhao Shuqin couldn't help but explain, and several policemen even towed the frame and prepared to arrest Zhao Shuqin.Zhao Shuqin was frightened and struggled desperately.Helpless, several policemen controlled him tightly.No matter how much he resisted, it was to no avail.He could only watch helplessly as he was taken away.This made him even more frightened, and he screamed in fright.

This cry also woke up Zhao Shuqin from his sleep.He looked around in panic and found himself in a hotel.The scene just now was just a nightmare.Zhao Shuqin couldn't help but let out a long sigh of relief.However, he was really frightened and was covered in cold sweat.He rolled out of bed, went to the bathroom to wash off the sweat from his body, and then lay back on the bed.However, he no longer felt sleepy.He picked up his cell phone and dialed He Shuyi's number, wanting to chat with her and pass the long night.But after calling three times, no one answered.Zhao Shuqin was bored, so he simply turned on the TV and watched the news.It happened to be a rebroadcast of Lujiang News Express.Zhao Shuqin didn't bother to switch to other channels, so he watched Qilujiang News carefully.First, they reported on some hot topics in people's livelihood, and then they talked about the murder that happened at Lujiang College yesterday.

Moderator: Okay, let’s turn our attention to Lujiang College.This morning, the 110 alarm center of the Municipal Public Security Bureau received a report from the manager of a laboratory at Lujiang College saying that two students were found dead in the third laboratory of the Inorganic Chemistry Experiment Center of the Department of Chemical Engineering of Lujiang College, and the police were asked to deal with it immediately.After receiving the alarm, the Municipal Public Security Bureau attached great importance to it.Comrade Lin Lifeng, the leader of the bureau, personally led the team and rushed to the scene in time to launch an investigation.

The TV screen then switched to footage of the police investigating the case at Lujiang College.

Synchronous commentary: It is understood that the two students who died were third-year students majoring in inorganic chemistry in the Department of Chemical Engineering of Lujiang College.Before the incident, they had been working continuously in the laboratory for more than 30 hours.After the police arrived at the scene, they took temporary closure measures on the Inorganic Chemistry Experiment Center of the Department of Chemical Engineering.Forensic doctors conducted detailed evidence collection work at the scene.The police also implemented short-term access control on the Lujiang University campus to identify people with suspicious identities.As of [-] pm today, the on-site investigation and evidence collection work has basically ended, and the entry and exit order of Lujiang College has returned to normal.

The TV screen switched back to the host.

Moderator: According to the news we just received from the police, the cause of death of the two deceased students was initially determined to be carbon monoxide poisoning.As for the cause of the poisoning, further investigation by the police is pending.We will also continue to pay attention.

Seeing this, Zhao Shuqin couldn't help but become nervous.He suddenly remembered the inexplicable words that the netizen named "Invisible Man" said to him when he was on QQ in the Internet cafe yesterday, and also recalled some of the previous exchanges between the two.

It turned out that after Zhao Shuqin applied for a QQ account, he gave himself the online name "Prince of Chemistry".Because he prefers chemistry, and his grades in chemistry are also good.Soon, this netizen named "Invisible Man" applied to add him as a friend.Zhao Shuqin agreed without hesitation.The two first exchanged some innocuous topics.Later, the discussion was devoted to chemical issues.Through communication, Zhao Shuqin found that this "invisible man" still had a relatively extensive grasp of chemical knowledge.His knowledge system is obviously beyond what Zhao Shuqin, a high school student, can normally achieve.Based on this, Zhao Shuqin deduced that this "invisible man" should be a college student who is receiving or has received college education.Zhao Shuqin once tested the other party in a subtle way, trying to find out his true identity.But the other party is extremely cunning and secretive.Zhao Shuqin secretly admired him.

Once, the two chatted again. "The Invisible Man" said, wanting to play a chemistry game.Zhao Shuqin asked what chemistry game it was. The "Invisible Man" said that how to create carbon monoxide is not traceable, at least it should not be discovered that it was done deliberately.The manufacturing environment is a tightly regulated chemistry laboratory.This problem is not difficult for Zhao Shuqin.He thought for a moment and then replied to the other party that the simplest way to produce carbon monoxide is the incomplete combustion of charcoal or coal.But in a laboratory environment, this method is obviously unrealistic.The more effective and most convenient way is to decompose formic acid under the catalysis of concentrated sulfuric acid.The reaction formula is as follows:

hcooh=co↑+h2o

The carbon monoxide prepared by this method is simple and convenient, and the product is the purest.Formic acid and concentrated sulfuric acid are also the most commonly prepared chemical reagents in laboratories and can be obtained locally.

The "Invisible Man" asked how to make this reaction happen inadvertently?

Zhao Shuqin thought for a while and designed such an experimental device: use two plastic tubes, one large and one small, and put them together; the two plastic tubes are divided into upper and lower layers with the same piece of glass sheet, and the upper and lower layers of the plastic inner tube are placed with concentrated sulfuric acid and formic acid, and then fill the gap between the inner and outer plastic tubes with an appropriate amount of metallic sodium powder; then let the water droplets slowly drip into the gap.Water reacts with sodium metal.The reaction formula is as follows:

2na+2h2o=2naoh+h2↑

The high concentration of sodium hydroxide produced by the reaction can slowly react with the glass piece.Because the main component of glass is silica.The reaction formula is as follows:

sio2 + 2naoh = na2sio3+ h2o

In this way, the glass pieces will be melted away.The concentrated sulfuric acid and formic acid in the inner tube will be mixed together.Formic acid decomposes to produce carbon monoxide.

Of course, the specific details of the design of the reaction device must be improved according to actual needs.But this idea is feasible.A series of products produced by the entire reaction, such as sodium hydroxide, sodium silicate, etc., are soluble in water and can be washed away with water without leaving any obvious traces.Dropping water drops into the gap between the inner and outer tubes can completely create the illusion of unintentional insertion.In this way, there will be no suspicion that it was done deliberately.If the reaction device is designed more perfectly, it can even achieve a state of seamlessness without leaving any traces.

The "Invisible Man" saw Zhao Shuqin's method and thought it was okay.However, he thinks it is not ideal and can easily leave flaws.He will then consider a more perfect method.

Zhao Shuqin did not refute.After all, with his current knowledge, this is all he can think of.However, he was a little confused as to why the "Invisible Man" would play such a boring chemistry game. The "Invisible Man" replied that he was participating in an experimental competition and wanted to surprise his opponents.Zhao Shuqin stopped delving further.

However, after reading the report of a murder in the Inorganic Chemistry Experiment Center of the Department of Chemical Engineering of Lujiang College, Zhao Shuqin immediately thought of this "invisible man."He had a vague feeling that this "invisible man" was very likely to be involved in the case.The report said that two college students died of carbon monoxide poisoning, and the "invisible man" had previously discussed with him how to produce carbon monoxide without leaving traces; the "invisible man" said that the game environment was a chemistry laboratory, and the murder case at Lujiang College happened to be Takes place in a chemistry lab.The coincidence is really weird.Zhao Shuqin had to suspect that this "invisible man" was the murderer. Yesterday he told Zhao Shuqin on QQ that the game was over, and it was very likely that he had already committed the crime. Moreover, he was committing the crime invisible. Because according to the method provided by Zhao Shuqin , as long as conditions permit, people can be poisoned by carbon monoxide without knowing it, and the cause and the real culprit cannot be found. If this is true, then this "invisible man" is too scary.