Since it is a chemical experiment, it is not enough to have experimental instruments, but also to have various materials for experiments.

Therefore, after Chen Xu returned to the city, he went to the Academy of Sciences again, and asked Uncle Sun to arrange for people to collect all kinds of different metal materials, non-metallic materials and various ores, etc., these things do not need much, but they will be used in chemistry classes in the future, and at the same time, Chen Xu also asked people to help find a few alchemists who are proficient in alchemy and alchemy, and then notified him to clean up a house in the College of Engineering and prepare to use it as a chemistry laboratory.

A few days later, Tang Ting personally brought a cart of beakers, flasks, test tubes, and some iron frames made of hemp rods and other items, all of which Chen Xu got to the laboratory of the College of Engineering, and several alchemists found by Sun Shuyi also arranged to study chemistry experiments with Chen Xu in the laboratory.

The first chemical experiment Chen Xu conducted was distillation to purify alcohol.

The purification process of alcohol is not complicated, that is, repeated distillation at low temperature, of course, if you want to get high-purity alcohol, you must use a water absorbent to continuously remove the water in the alcohol vapor, and as the simplest organic chemical solvent, alcohol and many metal oxides and salts will not undergo chemical reactions, which has sufficient water remover can be used, the most common is quicklime.

A large glass bottle is filled with a few catties of drunken eight immortals, and then connected to another glass bottle filled with quicklime through a glass tube with openings on both sides, and then a glass tube is connected to the third upside-down glass bottle to condense, all the conduit connections are sealed with wax, and then the large glass bottle is hung above the coal stove to bake, so as to ensure that the wine boils slightly.

This is an extremely simple distillation process, and Chen Xu quickly assembles it, but this complex structure, which is all made of various transparent glasses, falls into the eyes of several Fang Shi, which is as surprising as the earthlings seeing aliens.

Therefore, during Chen Xu's installation process, several monks with Dao buns and Taoist robes and fairy wind Dao bones were like elementary school students, and they didn't dare to come out, and they stood beside Chen Xu with wide eyes and cautiously.

For Chen Xu's new movements, a group of craftsmen and craftsmen from the Academy of Sciences and the School of Engineering were very interested, and soon dozens of people came to the laboratory to watch, and even Zhang Cang rushed back from the construction site outside the city to inquire.

Looking at this complex and strange glass instrument that was being distilled, Zhang Cang looked around carefully and then sniffed and couldn't help asking: "Master Hou, what is in this, and why does it smell like a strong aroma of wine?" ”

"Hehe, this is the liquor that Ben Hou made by the steaming method a few days ago, and if you continue to distill with this distillation instrument, you will get very pure alcohol, which can be used as fuel, and there will be no smoke when burning, which can ensure that you can clearly see the experimental effect!" Chen Xu explained with a smile.

"Could it be that there are rumors of drunken eight immortals outside?" Zhang Cang couldn't help but exclaim.

"Exactly!" Chen Xu nodded.

Since he told his family the story of the drunken eight immortals in the Hou Mansion, the name of the liquor has now spread out from the Hou Mansion, and this kind of high liquor was drunk as soon as he drank it, and it was touted as an immortal wine by those who tasted it, and Xianyang, which has been spread in a few days, is almost a household name, but this kind of wine has only been heard, and most people have never seen it.

Therefore, as soon as they heard that the glass jar contained the Drunken Eight Immortals, a group of people in the laboratory couldn't help it.

"Master Hou, wine is made of water, can it also be burned?" A teacher asked in surprise.

"Wine is not the same as water, that's what I opened this chemistry lab for......"

"Master Hou, these drunken eight immortals will get drunk when they hear it, can you taste it?" When Chen Xu spoke, Zhang Cang had already opened a jar next to him with a wine word on it.

"Dean Zhang, please!" Chen Xu nodded helplessly, so Zhang Cang scooped up half a cylinder of wine with a bamboo tube, put it on the tip of his nose and sniffed it, and then took a sip.

"Ga~~" Zhang Cang felt like he had swallowed a mouthful of boiling water in an instant, covered his neck, shook his body, and tears flowed out, and he stayed for half a minute before he slowly recovered his breath.

"How does Dean Zhang feel?" Chen Xu laughed dryly.

"If you drink boiling soup straight into your heart, Cang has never drunk such a strong wine, it is indeed fierce, but the taste is mellow and rich, and the soul begins to float after taking a sip...... "Zhang Cang trembled and wiped his tears.

"Master Hou, I want to taste it later!" A group of onlookers gathered around as if they were dead.

"Drink, drink, one sip per person, don't drink too much, the rest of Benhou has to do experiments!" Chen Xu waved his hand helplessly.

So a group of teachers and craftsmen who came to see the excitement all rushed to grab the bamboo tube and began to taste the liquor, and soon a cough and strange screams sounded in the laboratory, and the people who drank it covered their mouths and necks one by one and began to wipe their tears, and some of their cheeks instantly turned red and began to swing.

Looking at the wine jar that was missing two or three catties, Chen Xu's face turned a little dark.

Fortunately, this is wine, not sulfate hydrochloric acid, otherwise a large group of Daqin's best scientists would have been poisoned at this time.

It appears that a conspicuous sign will be placed in the laboratory in the future, prohibiting the tasting of any test agent.

The bad habit of these ancient people who dared to taste anything with their mouths is really too bad.

"Ahem, Master Hou, what is the theory of this chemistry? Is it the art of learning from physics in general? Zhang Cang asked with a slight drunkenness, shaking his head.

"Sort of, chemistry is also a branch of science, but the study of elements, belongs to the microscopic category, and physics is still different from the study of physical disciplines, its study is the general invisible natural changes to the naked eye, chemistry is the science of change abbreviation, the simplest is fire, we know that fire combustion can heat things, can make many things burn, but what is the nature of fire, how is it generated, what are the internal causes and principles of these changes that cannot be seen by the naked eye? Of course, this is only the most superficial part, and there are many things that are actually like spells, and why can Taiyi Divine Thunder explode, and why does the Divine Thunder Fireworks explode with colorful firelight? These are all under the umbrella of chemical research......"

"Master Hou, isn't Taiyi Shenlei an immortal art?" A teacher asked in disbelief.

"Where did the immortal magic come from? There must be a beginning, just like fire, in ancient times, the ancients believed that fire was the thunder fire descended by the gods, and later the Suiren invented the technique of drilling wood to make fire, so people slowly realized that fire is not the wrath of the gods, but a natural phenomenon, I used to talk in physics class, friction generates heat, when the heat accumulated by friction is enough, it can ignite sawdust, just like a match, a light stroke has a flame, this phenomenon is not simply physical can explain, It's a more subtle chemical reaction that is invisible to the naked eye, so what is the principle of match burning, can anyone know it? ”

A group of onlookers all pulled their beards and pinched their chins and began to be in a daze.

Fire is a commonplace natural phenomenon, no one has ever studied it seriously for thousands of years, and Zhang Cang has been mixed with Chen Xu for several years, not only a mathematician and architectural engineer, but also a fanatical science enthusiast, very interested in the various physical theories proposed by Chen Xu, especially the experiment of two copper balls landing at the same time, which subverted people's ordinary cognitive categories, it turned out that it was not that the heavier the thing fell faster, although Zhang Cang has not figured out the principle, But he also felt that there must be an unknown force at work between heaven and earth, he asked Chen Xu a few times, but Chen Xu didn't tell him, only said that his idea was correct, but the more specific content was not revealed.

The question about gravitational acceleration is not that Chen Xu is unwilling to say, but that the theory of this thing is too profound, and the current unit of measurement of Daqin is completely different from that of later generations, before the invention of accurate clocks and accurate weights and length units, these physical formulas are not of much significance, but will bring more unexplained problems, and it is completely meaningless for the current level of science and technology of Daqin.

Perhaps Chen Xu can only wait until his death and leave all kinds of physical and mathematical formulas in the suicide note for future generations to reason and verify.

"Since Dean Zhang and all of you are so interested in chemistry, today I will show you a very simple chemical reaction......

Chen Xu smiled and took a few pieces of green gall alum, put them in an iron mortar and mashed them into powder, and then put them in a crucible and put them on the coal stove to heat them.

There was a circle of people next to the coal stove in an instant, staring at the crucible with a mouthful of wine and unblinking.

Cholelum, also known as blue alum, scientific name is also called copper sulfate pentahydrate, belongs to a natural crystalline ore, copper ore will be dug out a lot, the ancients like to collect as gemstones.

Like raw gypsum, bile alum is a hydrated crystal mine, which will decompose the water molecules in it when heated, and finally turn into pure copper sulfate, which will turn into a white powder.

Although Chen Xu didn't know how high the temperature of the bile would decompose, the temperature of the coal furnace could burn red and even melt steel, enough for the water molecules in the bile alum to decompose.

A Fang Shi squatted next to him and pulled the bellows, and in the sound of hula la, a slightly pungent smell soon emanated from the air, and the blue powder inside the crucible began to fade in color, and after a few minutes, the blue powder placed in the crucible turned white.

A group of onlookers began to stir up and discuss.

"Master Hou, could it be that this bile alum has changed from blue to white because of a chemical reaction?" A craftsman couldn't help but ask.

"Yes, but it's just the simplest chemical reaction, and in the process of heating, something is lost in the gallium, and the color changes!" Chen Xu nodded.

"It's strange, what is it that I lose to change color?" Zhang Cang twisted his beard and continued to be in a daze.

"Actually, it's very simple to verify what is lost, let's do a reverse test, you know!"

Chen Xu took a beaker, poured some water into it, and then scooped out some powder from the crucible with an iron spoon, raised the beaker high and said, "You are optimistic......

As Chen Xu spoke, he poured copper sulfate powder into the beaker, and at the same time gently shook the beaker a few times, and almost instantly the water in the beaker turned pale blue.

"Wow~~" The entire laboratory was in an uproar.

"This ...... Isn't this immortal? A Fang Shi couldn't say anything excited.

"It's not immortal art, everyone, please think carefully about what Ben Hou just said!" Chen Xu shook his head.

"Could it be that Master Hou is talking about the water lost in the gallium when it was heated just now?" Zhang Cang's eyes suddenly lit up. ()

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