In the two bottles, one-third of the strong sulfuric acid solution was filled, and then the one on the left contained a silver metal sheet, and the one on the right contained a cyan metal sheet.

Emiya is connected by a wire at the end of the two metal pieces.

After a while, I only saw the bubbles on the left.

As long as the metals are different in activity and can react with strong acids at the same time, they can create a potential difference between the poles, which causes the electrons to move.

The most classic is the redox reaction of the copper-zinc galvanic battery in the high school chemistry book, zinc and sulfuric acid react to generate zinc sulfate and hydrogen, in this process, the positively charged hydrogen ions will flow in the direction of the copper electrode, and then combine into hydrogen overflow, and on the other side, the sulfuric acid anion will flow towards the zinc electrode, combined to form zinc sulfate.

Therefore, to a certain extent, the material called [Sun Copper] placed on the left side of the palace is less active than the one called [Moon Gold] on the right.

When Emiya saw this, he recalled the good old days of school, closed his eyes, and felt a sense of happiness arise spontaneously.

How classic, how wonderful, this is the most basic galvanic cell principle, enduring, even across different time and space, the truth is still the truth.

……

Cui Xiaoxiao, who was watching the [Introduction to Cultivating Immortals] from the side, raised her head slightly and looked at him with a contemptuous look.

This kind of thing in the junior high school textbook is still a lot of fun. (In the era of Cui Xiaoxiao's knowledge explosion, you have to learn these things in junior high school, and you need to learn high-end knowledge in multi-compound fields in college, otherwise it will be difficult to achieve anything before the age of 30.) ）

Noticing Cui Xiaoxiao's eyes, Wei Gong raised his head, and the corners of his mouth twitched, "Are you dissatisfied with me?" ”

Cui Xiaoxiao's small body trembled, and her whole back was straight.

"How dare you, Brother Emiya. The process of refining sulfuric acid just now is simply handsome. ”

"Really?" Wei Gong looked at her suspiciously, and then nodded contentedly after confirming Cui Xiaoxiao's acting skills.

However, Cui Xiaoxiao's words are indeed true, and the casting technology of the Wei Palace is simply beyond her imagination.

Generally speaking, the manufacturing principle of sulfuric acid is simple, but the manufacturing process is more complicated, even in the 70s of the 19th century, the purity of the sulfuric acid that can be manufactured is not high, and the output is very small, until the 80s of the 20th century, there is really a high purity of sulfuric acid.

Just now, Emiya did it in one go, first [artificial heating], raising the furnace temperature to more than 800 degrees, calcining sulfur ore, and then excreting the generated SO2 through the smoke port of the casting furnace, into a closed pipeline specially built by him, Emiya lowered the temperature in the pipe through [condensation and entanglement], and then introduced an appropriate amount of air through the blower box, and then catalyzed it through something called [white light stone], thereby triggering the oxidation reaction of SO2 and generating SO3.

At this stage, it must be kept dry and free of any substances that can react with SO3.

Cui Xiaoxiao was so impressed by Wei Gong's [Divine Refining and Air Drying] that he could do this with his bare hands without the help of any high-level equipment, which was really incredible.

The melting point of SO3 is very low, only about 16 degrees, so Emiya had to cool and encapsulate it from the pipe immediately.

Sulphur trioxide reacts strongly with water to produce a high concentration of sulphuric acid.

The process is seamless and breathtaking. It was completed with just some simple equipment and Wei Gong's amazing technology, which had to make Cui Xiaoxiao feel amazed.

Cui Xiaoxiao came back to her senses from the memories just now, continued to look down at her [Introduction to Cultivating Immortals], and then took a piece of Imperial Snake Fruit from the fruit bowl next to her and put it in her mouth.

The Imperial Snake Fruit is a grape-sized fruit that is only found in the Sword and Fairy World.

It is said that this is due to the fact that when laying eggs, the noble spirit snake needs to rub its body on the [Imperial Snake Tree] to make a fire mark on the trunk of the tree, and then lay the eggs in the xylem of the tree.

While the snake tree absorbs nutrients, it will produce something called [flower water], which is supplied to the eggs of the imperial snake, and at the same time, when the baby snake comes out of the shell, it will gnaw at the xylem and inject an essence called [imperial snake liquid].

After absorbing these essences, figs will come out of the branches.

These fruits are sweet and juicy, and have the effect of beautifying and nourishing the skin, so they are deeply loved by the majority of people.

It's just that the price is not cheap, about more than 100 days of Dao coins a catty.

To a certain extent, Cui Xiaoxiao loves to eat it, in addition to its good taste, the most important thing is that she hopes to be able to grow beautiful, at least not to lose to Jian Rin Sakura's aunt after ten years.

She chewed on the flesh and smashed, "But I really admire you, you dare to experiment with anything." ”

"Really?" When Wei Gong heard her say this, he was still a little weak-hearted. "As long as it's small, it's okay, right?"

It was at this moment that an explosion suddenly came from behind him.

The two of them only felt a roar in their ears.

"I'm going to go."

Emiya hurriedly crawled back and looked at the materials he had put down earlier, with a weird smile on his face.

On the other side, Cui Xiaoxiao also had the same expression.

She put down her book and walked over, "The reaction to what happened just now was very fast, it must not be caused by this layer of skin on the outside, then it should be something else." ”

Indeed, as she said, if one of the Japanese copper and the moon gold could have such a large exothermic reaction, then the moment Emiya threw it in just now, it would have exploded, and it would not suddenly explode in the middle of their words.

There must have been something that had a strong chemical effect with sulfuric acid, so much so that the heat generated was so violent that the glass exploded.

This process is then exacerbated by the violent combustion of hydrogen and oxygen in the air.

In a sense, the oxidation reaction is actually an exothermic reaction.

"If it can produce such a large amount of heat, it means that there must be something special in the material composition just now." Emiya used tweezers to pick out a fragment of [Moon Gold] from the ground, and found that the silver and white metal on the outside had receded a little, revealing a little black metal core inside.

"Although the specific composition cannot be determined." Cui Xiaoxiao swallowed a mouthful of saliva with difficulty, and looked at this thing with a pair of big eyes, "But, it is probably it." ”

……