After the whole sect traveled to ancient times, I led the rebellion

Saltpeter can be used to make ice. As long as you put saltpeter into a bucket of water, ice cubes will precipitate. The saltpeter here is potassium nitrate.

When potassium nitrate dissolves in water, it absorbs heat and lowers the temperature, which is a physical change.

The price of saltpeter will increase in summer. Ice made from saltpeter is quite popular among the powerful and wealthy. Most scholars and nobles will prepare a lot of saltpeter for making ice.

Even the Mu family would buy some saltpeter in the summer before.

Since saltpeter is expensive and profitable, naturally most saltpeter mines are controlled by the powerful.

It is available for purchase, and it is not spring yet, so we should take this opportunity to buy more.

There used to be a businessman named Xiao Jiu in Anping who sold saltpeter. After the frequent wars, he stopped doing business. Many landlords and nobles left Anping last year.

He sold some of the large amount of saltpeter he purchased, but the rest was left in his hands.

Mu Qing found Xiao Jiu and bought all the saltpeter that he had stockpiled.

Even though the price was slightly lower than last summer, Xiao Jiu was extremely happy.

When he got this batch of goods, Xiao Jiu became penniless all of a sudden as he only sold a limited variety of goods.

When Mu Qing left, Xiao Jiu saw him off with a smile.

根据化学反应，黑火药在爆炸时产生的化学方程式为2KNO3+3C+S = K2S+N2↑+3CO2。

This equation corresponds exactly to one sulfur, two nitrates and three charcoals.

After finding a batch of saltpeter ore, Mu Qing began to experiment.

This saltpeter was definitely not enough, so Mu Qing specially ordered a batch of saltpeter from Jiang He.

In fact, the yield of artificially cultivated saltpeter is higher.

Mix the gravel and soil used to make saltpeter with manure water in a ratio of 10:1 and pile it on a flat, dry and ventilated ground.

Keep it ventilated and exposed to sunlight, and you will get nitrate soil by piling it up for about 20 days.

Mu Qing put the obtained saltpeter and wood ash into the filter tank and stirred them evenly, then added boiling water and soaked them for half an hour.

What is filtered out in this step is nitrate water.

Finally, pour the nitrate water into a container and bring it to a boil.

Mu Qing instructed the farm students who were boiling nitrate water to always be careful to remove impurities attached to the surface.

If the liquid soaked in bamboo and dropped onto iron quickly solidifies to form crystals, you can stop heating.

If the nitrate water at this moment is left standing for a day, a large amount of crystals will precipitate out, which is raw saltpeter.

Dissolve saltpeter in hot water, and the impurities such as sodium chloride that evaporate and precipitate will form crystals that, after cooling, are saltpeter.

The theory is feasible and practice begins.

In order to obtain a large amount of saltpeter, Mu Qing stayed in the chemical department of the base for a whole month.

After Mu Qing's tinkering with black gunpowder, it was not difficult to prepare it after gathering all the raw materials.

Mu Qing conducted several experiments. In order to increase the power of black powder, he added flour to it, so that the gunpowder obtained was granular.

Ordinary black powder is powdered gunpowder. A shell that explodes in two pieces has little power and poses no threat to the enemy. It is also unstable and prone to misfire.

Granulated gunpowder is more powerful than powdered gunpowder.

After being granulated, black powder has better fluidity and is easier to load, while also having an appropriate and determined filling density.

This way, there will be no parallel layer combustion and eruption caused by over-packing, and there will be no small power or duds caused by too loose filling.

Mu Qing tried to fill a bag of black gunpowder and put the fuse in place.

The experimental base is divided into agriculture, chemical industry, biology, physics, and military industry departments.

There is some overlap between the Ministry of Military Industry and various departments. In fact, the gunpowder this time should be counted under the Ministry of Military Industry.

However, it did not affect the Ministry of Chemical Industry's establishment at the outermost edge of the entire experimental base, which is even in a very remote place.

In order to test the power of black gunpowder, Mu Qing called Zhuge Huaian, Mo Xuzhi, Mu Wu and others over.

Mu Qing specially locked the two chickens he bought in the morning in a cage.

The experimental site was relatively open. This area was circled by Mu Qing and there were no other pedestrians except Mu Qing and others.

The explosive packs made of granulated black powder were tied to the outside of the chicken coop.

At first glance, black powder has a very powerful explosion.

Mu Qing entrusted the step of lighting the fuse to Situ Jin, who was a master of martial arts.

When Mu Qing saw Situ Jin lighting the fire, he quickly shouted:

"Run!"

Although Situ Jin didn't know why he had to run a hundred meters, since this was Mu Qing's instruction, he did as he was told.

The two chickens in the chicken coop seemed unaware of what was about to happen. They looked around and then lowered their heads to peck at the grass.

Granulated black powder is ignited by a fuse, with the flame passing through the spaces between the powder particles.

After more than ten seconds, all the gunpowder was ignited at the same time by the spark of the fuse!

"boom!!!"

Granulated gunpowder exploded on the ground!

The ground shook and thick smoke rose.

A huge explosion occurred in the open space.

Zhuge Huaian opened his eyes, his fingertips tightly grasping the feather fan, his knuckles turning a little white.

Mu Wu and Xiang Quan were completely stunned as they watched the chickens that were originally tied in the chicken coop being blown everywhere.

Even the land there was covered in black from the explosion.

"!What's this."

Mu Wu held his chin in shock, but he couldn't hide the curiosity in his eyes.

Mo Xuzhi and Situ Jin, two former or current military generals, silently admired the gunpowder explosion process.

After the loud noise, they could not hide the curiosity in their eyes even more than Mu Wu. Such a powerful weapon, as long as it was thrown out, it would kill anyone it pointed at.

"Cough cough."

Mu Qing faced the countless pairs of eyes staring at her and did not keep anyone in suspense.

"This is gunpowder, the same gunpowder used to set off firecrackers and fireworks. However, the gunpowder we just saw is granulated gunpowder.

The gunpowder improved by the Ministry of Chemical Industry is extremely powerful, and the explosive pack just demonstrated was made of granulated gunpowder."

A bunch of new terms came out of Mu Qing's mouth. Zhuge Huaian and Gongshu Yi, who had read chemistry books, barely knew what the gunpowder Mu Qing was talking about.

Gongshu Yi has been studying the structure of the flintlock rifle for a long time recently, but unfortunately he still lacks the most important gunpowder.

Seeing the gunpowder explosion scene, his assessment of Anping’s military strength raised to a higher level again.

The two chickens that were still alive and kicking were instantly killed by the gunpowder. The power of the explosion was terrifying for those who had never seen gunpowder.

If it is used in military...

Zhuge Huaian then looked at Mu Qing with pleasure. If this gunpowder could be produced in large quantities, Anping could be defended even if another 30,000 militiamen came, let alone the previous 30,000.

Several people present saw the value of gunpowder.

Shen Moyan and Jiang Ji looked at Mu Qing with relief.

As expected, she is Junior Sister.

Shen Moyan knew that this explosion could be produced by using spiritual power, but this was the Tianchi Dynasty and it was not convenient to use spiritual power.

Such power is equivalent to that of a low-level talisman paper.

In fact, in terms of power, nitroglycerin explosives are even stronger, but this type of explosive requires ether.

We can consider asking the Ministry of Chemical Industry to make some improvements in the future.