"Panda, are you feeling well?"

Qin Lie quickly walked over to Bai Xianglan and asked.

"Well, I don't know what's going on, I'm suddenly a little nauseous and tired, and I'm a little dizzy."

Bai Xianglan frowned, with a morbid look on her face.

"Hand out, I'll check it out for you."

Qin Lie said immediately.

"it is good."

Bai Xianglan nodded and handed her arm to Qin Lie.

Qin Lie first took Lin Qiuzhu's pulse, then checked her tongue coating, and asked about her personal situation.

"How about Brother Qin, isn't Sister Xianglan pregnant?"

Su Xiaoxiao leaned forward and asked nervously.

"What nonsense are you talking about, your sister Xianglan is still perfect."

Ye Yuqing rolled her eyes at Su Xiaoxiao and said.

"Uh, didn't I retching when I was pregnant on TV? I thought Sister Xianglan was pregnant."

Su Xiaoxiao explained embarrassedly.

"Panda is not pregnant, but because of the lack of salt in the body, so the discomfort is caused."

Qin Lie quickly shared his diagnosis with everyone.

"Sister Xianglan lacks salt? Does this also make you sick?"

Su Xiaoxiao asked blankly.

"Yes, if the body is deficient in salt, symptoms such as dizziness, fatigue, loss of appetite, and rapid heartbeat will occur. In severe cases, nausea, vomiting, or even coma and shock will occur. Fortunately, the situation of pandan is not serious, just need to add salt. That's it."

Qin Lie nodded.

He found out last night that Bai Xianglan hadn't eaten much. At that time, he thought Bai Xianglan was not hungry, but now he realizes that Bai Xianglan must be lack of salt in his body, so he lost his appetite.

"It's easy for you to say, but we are a desert island, where can we find salt?"

Su Xiaoxiao asked with a wry smile.

"It may not be easy to find salt elsewhere, but don't forget that we are at the seaside, and there is a lot of salt in the sea."

Qin Lie smiled and said.

"Brother Qin, you are smart. There is so much salt in the sea. As long as we boil the water dry, it's not as much salt as we want."

Su Xiaoxiao immediately flattered.

"Qin Lie, if I remember correctly, sea salt made by boiling seawater directly cannot be eaten directly, right?"

Lin Qiuzhu interjected.

"Hey, you actually know this, not bad."

Qin Lie looked at Lin Qiuzhu in surprise.

"I seem so ignorant when you say that."

Lin Qiuzhu rolled his eyes and said.

She doesn't know much about common sense things, but she doesn't know everything.

For example, sea salt can't be eaten directly. She happened to have heard others say it before, so she wrote it down.

"Brother Qin, isn't sea salt also salt? Why can't you eat it directly?"

Su Xiaoxiao couldn't help but ask her doubts, she didn't know anything about these things.

"Because the composition of seawater is complex, there are more than 80 known ingredients, and there are many harmful ingredients in the directly dried or boiled coarse salt, which must be processed twice before it can be eaten, otherwise the magnesium sulfate alone will It can cause severe gastrointestinal reactions, ranging from vomiting, diarrhea, and weakness to legs and feet, and even death in severe cases.”

Qin Lie replied with a serious look.

There are sea salt in the store, but they are basically secondary processing, and the sea salt that is directly boiled must never be eaten.

He had read a news before about a mentally retarded internet celebrity who deliberately boiled seawater to make coarse salt to eat, but almost didn't eat himself in the morgue.

"Brother Qin, you have confused me. You said that you used seawater to make salt for Sister Xianglan to eat, but now you say that sea salt cannot be eaten. Isn't what you said just now contradicting yourself?"

Su Xiaoxiao asked in confusion.

"Haha, the directly boiled coarse salt is definitely not edible, but I use the multiple crystallization method, so that the sea salt produced can be eaten."

Qin Lie smiled slightly.

"Multiple crystallization method? What the hell is this method?"

This time, not only Su Xiaoxiao, but everyone including Ye Yuqing showed curiosity on their faces, obviously waiting for Qin Lie to explain.

Qin Lie didn't sell anything either. After a short pause, he continued: "If you have studied chemistry, you should know that dissolved substances in seawater are greatly affected by temperature. Usually, compounds with low solubility will crystallize first."

"Among all the known seawater components, the solubility of sodium chloride is relatively high, but the solubility of potassium chloride, magnesium chloride and calcium chloride is higher, and the proportion of the content is still small, which will be later than sodium chloride. crystallization."

"Let's take calcium chloride as an example. Its solubility is about 1/140 of that of sodium chloride. When it is heated to 75 degrees, the solubility will become 1/162. It is one of the preferred crystallizations of sodium chloride."

"So as long as we make reasonable use of this solubility relationship and repeatedly crystallize seawater, the main component of the final crystal will basically only contain sodium chloride, and such sea salt can also be eaten directly."

Qin Lie did some popular science for everyone in simple and clear language as much as possible, but these things were still a bit too esoteric for them, and everyone heard a little understanding.

"Brother Qin, you know a lot. You must be a scholar at school, right?"

Su Xiaoxiaoman asked admiringly.

"I can't talk about Xueba, it's just that I like to know some unfamiliar things."

Qin Lie smiled and said.

When he was in school, his partiality was quite serious. Like mathematics and biology, he basically got full marks in the test, but he barely passed the two subjects, English and physics. Otherwise, he would have been admitted to Tsinghua University and Peking University long ago.

"Okay, let's not talk too much about it. I'm going to make sea salt now. Anyone of you will get some water back. I'll need a lot of fresh water later."

Qin Lie returned to the topic.

"Let's go fetch water with Xiaoxiao and Qiuzhu."

Ye Yuqing took the initiative to speak.

"Okay, then you go, I'll start making sea salt."

After saying this, Qin Lie started to act.

He first went to the beach to get a pot of sea water and came back, and then put it on the fire and burned it.

As the water in the pot continues to evaporate, some white crystals begin to separate out at the bottom of the pot. When the water is completely dry, only a layer of white granular objects remains at the bottom of the pot, and these are the most primitive coarse salt.

At first glance, this salt is not much different from table salt, but in fact, the composition of this coarse salt is very complex, and it is bitter and astringent, so it is not edible at all.

After that, Qin Lie got a second pot of seawater and started to boil it.

After the water boiled dry, Qin Lie made a third pot, a fourth pot...

After boiling six pots of water, Qin Lie made a total of more than 100 grams of coarse salt.

Because he had been busy beside the fire, Qin Lie was already sweating profusely, and his clothes could squeeze out water.

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