The experiment Li Yuanjia said was actually very simple.

The plant ash is rinsed with water, and after those impurities are removed, what remains is sodium carbonate...... At least a large part of the composition of sodium carbonate.

When sodium carbonate reacts with hydrated lime, the resulting calcium carbonate precipitates, leaving a sodium hydroxide solution. Sodium hydroxide can be combined with magnesium chloride in sea salt to form magnesium hydroxide precipitation. Next, the sodium carbonate itself can react with the calcium chloride in the sea salt to form a calcium carbonate precipitate......

Of course, Li Yuanjia knew that there were other impurities in sea salt, but unfortunately, there were only these two things he could think of.

Therefore, he needs Ma Liang and the students of these schools next.

Li Yuanjia will not give them the answer directly...... In fact, he himself only knows that there is such a method, and he does not have a very precise concept of how to operate it and in what order it should be operated. So after careful consideration, Li Yuanjia decided to put the pressure of the experiment on Ma Liang and them.

The papermaking workshops outside the city have accumulated a lot of good goods in recent years.

In order to find the most suitable material for papermaking, they have not only tried countless kinds of bark and grass roots over the years, but also used an unknown number of minerals, and accumulated a wealth of experience and data - although the most important thing in papermaking is plant fibers, other additives are needed to make them bond together.

The contents of these small bags are Wang Pu's accumulation over the past few years.

Each of them can be soluble in water.

What they need to do is to use these things to react with sea salt, so as to find a way to remove the bitterness and astringency inside.

It's simple, but it's also complicated.

The simple thing is that the operation itself is not very troublesome, you just need to dissolve the sea salt in water, then dissolve these minerals in water, and then let the two react; But at the same time, this operation is extremely complicated, because there are more than 20 kinds of raw materials in front of you, which ones are useful, and in what order they should be used, you need to explore and experiment......

"It was a very important experience for them."

After those little guys carried away the sea salt and more than two dozen bags of things, Li Yuanjia said in a deep voice to Ma Liang: "So you have to keep an eye on me the whole process, not only must you complete all the steps patiently and meticulously, but also make a good record...... I'm going to see the full record sheet when I get back, understand? ”

"Understood, King."

After taking a deep breath, Ma Liang nodded with some trepidation.

He knew very well in his heart that this was a test for him, and it was also a test for the achievements of the Royal Mansion Academy in the past two years!

If the result satisfies the king, then it is conceivable that he will be rewarded, and it must be a heart-warming reward, but if the result is a mess and the king is not happy......

Thinking of this, Ma Liang's expression became more and more solemn.

After waving his hand to let Ma Liang leave, Li Yuanjia narrowed his eyes slightly, and sighed secretly in his heart.

If he can have a few useful talents under his hands, where does he need special instructions for this kind of thing, and even help design test procedures? If you give an order, you may be able to get a result in just one or two days, but unfortunately, there are only a few people under Li Yuanjia who can be used now, and they are all pure half-assers, and he needs to frequently take personal action to command.

So after thinking about it, he could only smile bitterly and shook his head: "I hope this group of little guys can have a few usable talents, otherwise it will be too difficult for me to rely on Ma Liang and Li Zhong alone......"

For the sake of his own ease in the future, Li Yuanjia chose to be more difficult now.

Perhaps he could do the initial purification of sea salt in a few days with his own hands, after all, it was too easy to filter those insoluble magazines, and he had an idea to remove calcium chloride and magnesium chloride, and the rest only required some simple operations. But in this way, he hopes to let the students in the academy learn something, or at least leave a way of thinking in their hearts, a way of thinking that cannot be learned at all in this era......

……

Just when Li Yuanjia was bothering about the students in her small primary school, Fang Fengzhu had already met several of her sisters and chatted happily for a long time.

There are not many people, except for Fang Fengzhu himself, there are only three.

Among them is the hostess of the Yingguo Mansion, Li Shi, that is, Li Yuanjia's sister, and also his aunt...... cough cough, although the relationship is a bit chaotic, there is no doubt that he is the closest one to Li Yuanjia. The other is Wei Shuyue, the eldest lady of Zheng Guogong Wei Zheng's mansion, who also has the best relationship with Fang Fengzhu.

As for the third one, he is also very close to Fang Fengzhu, which is his eldest brother's wife Du Shi.

Fang Fengzhu had nothing to hide in front of these three people, and after chatting for a while, he quickly told the matter, and then asked with a smile with a pair of big eyes: "Sisters, if the younger sister specially buys a house and uses it to make this club, are you willing to come and sit often?" ”

"This ......"

After listening to her words, the three girls looked at each other and were very surprised.

Why did this girl suddenly have such an idea?

Although the atmosphere of Datang is open, and women can also come out to get together every day, or travel together, or even hold poetry meetings or something, but the idea of building a club for everyone to use for gatherings is really too fresh. After all, there are many places in this world that are specially built for men, but it seems that they have not heard of the special construction for women?

So after being silent for a while, Du Shi couldn't help but smile and said, "Fengzhu, your idea is quite fresh, but it's just ...... We usually get together without trouble, and it's very convenient to make an appointment with anyone's house, so why build such a place? ”

Blinking her eyes, Fang Fengzhu remembered Li Yuanjia's words, and said with a smile: "The reason is very simple, because you can go at any time!" Sister-in-law, you think, we usually have to meet several days in advance when we usually get together, and we have to find a day when everyone is free...... If you have this club, you can go whenever you want, and you can even find a fixed day, such as the last day of each month. ”

"Uh......"

After thinking for a while, Du Shi smiled bitterly: "What you said has some truth, but ...... What can we do when we go? You can't just sit there and talk every time you go, right? ”

After listening to her words, Wei Shuyue and Li nodded at the same time, deeply convinced.

Once in a while, it's really fun to gossip, but if you buy a house or something for this purpose, it's too exaggerated!

"Hee-hee, of course not!"

Fang Fengzhu had a score in his heart, and hurriedly said with a smile: "Don't forget, the cards and the big landlord are all made by our family...... I'll be honest with you, there's still a lot of fun stuff out there yet! When the time comes, they will all be in the club...... Moreover, what if one or two more cooks from our palace were arranged in it to prepare some delicacies every day? ”

"Huh? So...... Sounds good! ”

After listening to Fang Fengzhu's very seductive words, the eyes of the other three lit up at the same time.