Bai Guoguo couldn't laugh, but he didn't forget to rinse his mouth with a bottle of clean water for Qiguang.

Qiguang was busy for a long time, and finally suppressed this strange smell.

Proud looked at Qiguang with disgust and said, "Can you be more lacking in heart?" ”

"I, why am I missing an eye? I saw that the fruit girl also tasted it, so, so ......"

"Didn't you see that people licked a finger instead of taking a big sip?"

Ao rolled his eyes, and the disgust in his eyebrows became even more obvious.

Qiguang also knew that it was a joke that he didn't observe enough, so he scratched his head with a red face and didn't make a sound.

Bai Guoguo and Chongyi looked at the sea at this time, and studied: "Chongyi, let's settle down here now!" One is to have a good rest, and the other is to try to refine sea salt from here. As long as it is successful, then the tribe will be able to use salt much more conveniently in the future. ”

"Okay! However, the ground is too soft for camping, and it looks like we have to go back to the woods. ”

Chongyi simply thought that the beach was too soft, but Bai Guoguo nodded approvingly, and the reason for his approval was that he was worried about the rising tide of the sea.

Although the starting point is different, the purpose is the same.

At that moment, the four of them returned to the edge of the woods and set up two tents.

The two tents are not far away, and in the middle is a half-sized campfire.

Since coming down from the cliff, the four of them have not eaten steadily.

Now that we've finally settled down, everyone's appetite is good.

However, the ginkgo fruit ate quickly, and after eating, he went back to the tent, and then went directly back to the space, and began to retrieve the relevant information about the extraction of sea salt from seawater.

Taking advantage of this, Heavy Wing asked Ao and Kaiguang to go back to the tent to rest, while he stayed by the campfire and was in charge of his duties.

“…… Boil the seawater dry, and after boiling it dry, you get coarse salt, which is harmful to our health and cannot be eaten directly......"

Bai Guoguo looked at the information on the screen and couldn't help but tap his chin with his finger.

"After boiling and drying, the coarse salt needs to be purified again, and the impurities contained in the coarse salt can be extracted to obtain clean salt ......."

"Coarse salt contains insoluble impurities such as sediment, which can harm human health and teeth, as well as soluble impurities."

Seeing this, Bai Guoguo couldn't help but feel excited.

"Oh my mother, I didn't expect it to be really harmful to people! No, I'll have to explain to that kid Qiguang later, if this kid drinks seawater and really becomes stupid, wouldn't it be a bad dish? ”

Thinking of this, Bai Guoguo hurriedly wrote down this in the small notebook on the side.

"Seawater should never be drunk directly!"

After jotting these down, Bai Guoguo continued to look at them.

"After precipitation and filtration, the sediment is removed, the water is removed by evaporation, the dissolvable impurities are removed by chemical reaction, and finally the pH is adjusted with hydrochloric acid, and the salt is obtained after crystallization."

"Chemistry?"

Bai Guoguo was stunned again, ", where do I go to do the chemical reaction?" ”

As he spoke, Bai Guoguo hurriedly continued to look down.

When she found out that she had to use hydrochloric acid to adjust her pH, she instantly felt that her whole person was not good.

"Hydrochloric acid, where am I going to get hydrochloric acid?"

Scratching her hair irritably, Bai Guoguo had no choice but to continue searching for the next keyword patiently.

"How to extract hydrochloric acid"

But no matter how he checked, Bai Guoguo felt that under the current situation, it was impossible for him to do this.

Therefore, she had to temporarily abandon the step of refining coarse salt.