Standing in the cave of the chemistry laboratory, Dexin Zhenren knocked on the beaker in the laboratory, "Students, today's assessment topic is spiritual power to hydrogen, you can use any method."

The score will be determined based on the purity and yield of the gas obtained, with the higher the purity at ignition and the longer the burning time, the higher the score will be awarded. Did you hear it all?"

"Clear—"

The wrinkles on Dexin Zhenren's face flashed with satisfaction, but his voice was full of sternness, "Okay, let me emphasize again, you must follow the operation steps and use the Lingjiao protective pad correctly." If there's an explosion from somebody today, then don't think about getting a point from me. ”

Dexin Zhenren also wanted to carefully advise the exam precautions again, but seeing that the face of the great immortal master Xuan Yizhen who was in charge of supervision next to him was getting more and more ugly, he hurriedly simplified the content,

"The assessment time is a quarter of an hour. Now it's time for you to prepare for a cup of tea. When the exam starts, I ring the wake-up bell. You can only do it when you hear the bell!"

As soon as the words fell, the teenagers in the laboratory rushed into action.

Meng Xiwen was relieved when he heard the exam questions.

Spiritual power hydrolysis is the use of spiritual power as an energy source to split water into hydrogen and oxygen, which is an important method of producing hydrogen.

There are generally two methods that are commonly used, one is to use spiritual stones as energy sources, and the other is to use the spiritual power of the cultivator himself.

But now, there are not many people in the class who have successfully induced qi into the body, and they mainly use spirit stones as an energy source. In addition, although the cost of using spirit stones will be higher, the energy supply of spirit stones is more stable, and the quality of the gas obtained is also better.

In order to get a good score in the midterm exam, Meng Xiwen chose the spirit stone energy supply without thinking.

Take out the spirit stone and the spirit banana protective pad from the backpack, and take the corresponding glazed utensils, and put them on the Mufeng stone to clean them.

Meng Xiwen looked at his ready-to-prepare workbench with satisfaction, quietly waiting for the bell to ring.

"Ahh

Not a bell.

It's Meng Xipan! Meng Xiwen looked in the direction of the sound.

Meng Xipan was diagonally behind Meng Xiwen, and at this moment he was turning the bag he was carrying over and pouring things outward.

Forgot something?

Meng Xiwen looked at his desktop, the spiritual banana protective mat, and the glassware.

"Where's my spirit stone?" Meng Xipan rummaged through his backpack back and forth, crying in his voice in a hurry. He hadn't yet drawn qi into his body, and without the spirit stone, this experiment couldn't be done at all.

"Meng Xifat, your snacks have been eaten by you~ Hahahaha!" Peng Jingxin in front of him turned his head, his face was full of schadenfreude, how good is it to have one less opponent in plain office?

Dexin Zhenren noticed the situation here, "Ah-don't make any noise! Meng Xipan, what's the matter with you!"

Dexin Zhenren walked over to this side as he spoke, "You didn't bring a spirit stone? I-"

Xuan Wei Zhenren suddenly appeared here and blocked Dexin Zhenren's words, "I'm not even so concerned about the exam, go out!"

Meng Xipan, who was still looking forward to it, his face became colder than the voice of the mysterious real person, the tears in his eyes trembled at the edge of his eyelashes, and he looked at the two real people, his eyes were full of begging.

The mysterious real person stood in front of Dexin Zhenren, and his cold and hard breath prevented Dexin Zhenren from pleading several times.

Meng Xipan looked at the cold expression of the mysterious real person, looked at the smug or sympathetic eyes around him, and finally slowly lowered his head and began to clean up the scattered tools.

"Third brother, you put the spirit stone here for me. Meng Xiwen grabbed the spirit stone on the table and handed it to Meng Xipan, "Have you forgotten? I plan to use my spiritual power!"

"Ah Wen. Meng Xipan raised his head, and when he saw Meng Xiwen's straight hand and his face full of seriousness, his eyes, which were already full of tears, turned even redder, "Thank you." ”

Seeing Meng Xipan receiving the spirit stone, Meng Xiwen returned to his position and looked at his countertop, a little confused.

With spiritual power?

To use one's own spiritual power to provide energy, it is necessary to consider the deformation speed of the spiritual banana mat and the filtration speed of the dewatered animal skin. The pressure is high, and it will explode if you are not careful.

I've tried it before, but it's hard to stabilize the output, or the speed is too slow, and the output is scarce.

Either the speed is too fast, and it rushes away from the Lingjiao protective pad at once, and it almost explodes several times.

"It's useless and self-inflicted, it's exactly the same. The voice of the mysterious real person suddenly came from the side.

Meng Xiwen raised his head from his thoughts, and the mysterious real person had already returned to the stage, as if it was just an illusion.

Before Meng Xiwen could come up with a solution, Dexin Zhenren rang the wake-up bell, and the exam began!

Things work themselves out.

If you don't have a spirit stone, you can still fight it, but it's a big deal not to go down the mountain with Senior Brother Yunwang. Meng Xipan lost the spirit stone, so he really had to give up the exam. Do you want him to give up the exam on the first big exam?

Meng Xiwen didn't think much about it, and assembled the entire experimental equipment according to the experimental requirements.

Pour half a bottle of Tianquan water into an open bottle, and seal the banana mat on the mouth of the bottle.

Lingjiao is a plant with broad leaves, and the soft cushion made of its leaves has good sealing, and at the same time has a certain elasticity, which can buffer the pressure of gas generation for a while.

Meng Xiwen took the hollow glass tube that had just been washed, and pierced two holes in the Lingjiao mat to lead out two channels.

Then the filter layer is padded in the two channels, and finally the porcelain jar is connected.

After a while, the hydrogen produced needs to be filtered with the skin of the water-leaving beast, and the remaining oxygen is filtered with the Lingjiao leaf membrane.

Meng Xiwen connected the equipment and checked the seals everywhere.

If this leaks somewhere, the purity of the gas obtained is not enough, and if it explodes, the people who go down the mountain may also be shattered.

The previous ones are done, and the last step is missing.

Meng Xiwen was a little nervous, took a deep breath, and looked up to observe the progress of the others.

My speed is relatively fast, and other students are also setting up a test bench.

It's just that?

Chen Zhang took the lingjiao mat and rolled it into a tube, grabbed it in his left hand, carried it behind his back, and pinched it repeatedly, not knowing what he was doing.

This experiment doesn't use a banana tube.

Meng Xiwen retracted his gaze, and suddenly had a flash of inspiration!

Try it!

Meng Xiwen quickly cut a piece of spiritual banana pad, rolled it into a thin tube like Chen Zhang, and sealed the interface with spiritual power.

Then connect the Lingjiao tube to the probe of spiritual power to hydrolysis and hydrogen production, and finally put the probe into the Tianquan water in the open bottle, leaving the Lingjiao tube outside.

Meng Xiwen squeezed the spirit banana tube tightly with his left hand, and took a few deep breaths, and success or failure was all in one fell swoop.

Meng Xiwen raised his right hand and slowly injected spiritual power into the spiritual banana tube.

OK!

Spiritual power will be temporarily blocked by various tangible substances, and pinched spiritual banana tubes can block spiritual power.

Now as long as you control the opening and closing of the spiritual banana tube according to the speed of your spiritual power output, you can control the spiritual power of hydrogen production!

Meng Xiwen stabilized his mind, concentrated, and coordinated the movements of his hands.

The banana pad on the open bottle slowly expanded, and the sound of uniform and steady air flow came from the outlet of the hydrogen!

It worked!