Prince's Key Point of Stability

I saw Chapter 17. The protagonist disliked the bitter taste of official salt, so he used distillation and crystallization to refine the salt. Just a 6. As a chemistry student, I am really speechless! Let me do some popular science! Sources of salt include sea salt, mineral salt and lake salt. Different sources usually have different types and contents of impurities. But generally speaking, impurities in salt are divided into insoluble impurities and soluble impurities. For insoluble impurities, filtration can be used for treatment. For mineral salts, common methods include crushing, adding water to dissolve, and filtration. Ancient filtration was not like the filter paper used in laboratories today, and gauze was used for large-scale processing. If there is color, add some activated carbon. But what should we do if sea salt itself is a homogeneous solution? The second step is refining. Refining can be understood as a concentration step in a separation and purification process. The refining of salt is usually known to everyone. The sun evaporates first, evaporates to a saturated brine liquid, and then continues to evaporate. The solubility curve of salt changes greatly, so when part of the solvent is evaporated, a large amount of solid salt particles will precipitate, but this does not mean that other soluble salts It will not precipitate. People also have solubility curves. The solubility curve of most salts increases as the temperature increases. Except for some such as calcium hydroxide, the solubility decreases with the increase of temperature. This means that most salts will also precipitate with the evaporation of water. However, their solubility curves are not as steep as those of sodium chloride. Therefore, the less precipitation does not mean that there is no or a very low amount. Typical impurities are magnesium ions. The salt is bitter because of the presence of magnesium ions. Evaporation and condensation cannot make the salt less bitter. The third step is the most important step, which is to add salt and remove impurities. Add excess barium chloride, sodium hydroxide, and sodium carbonate in sequence to remove the corresponding sulfate, magnesium ions, and calcium ions, turn them into precipitates (barium sulfate, magnesium hydroxide, calcium carbonate), and filter them out. Finally, hydrochloric acid is added to remove excess hydroxide and carbonate. Finally it evaporates and crystallizes. Why overdose? Because we cannot judge whether these impurities are completely precipitated. Modern instruments such as ion chromatography can be used to quantify them, but they were not available in ancient times, so all reagents added were excessive. Of course, these pure reagents did not exist in ancient times, but there were shells that could be used to burn calcium hydroxide, plant ash (potassium carbonate), etc. For those who don't know much about the method used by the protagonist, there is no problem, because it is originally part of the salt-making process, but he cannot achieve the effect of no bitter taste in the article. To this day, salt factories along the coast still use this step, but a closer look at history shows that progress in any industry is not achieved overnight. In the early days of the founding of the People's Republic of China, salt with a bitter taste was still sold in rural areas. Later, technology progressed step by step to become what it is today. Everyone is accustomed to it, which is the result of the country's step-by-step progress. Of course, if you evaporate and crystallize repeatedly, you can eventually get bitter-free salt, but one evaporation is a loss, which is not economical and very time-consuming and energy-consuming. It is absolutely impossible to evaporate it in one time like the protagonist.

This book is completely substandard, written in a brainless and idiotic manner. Is the capital of Xixia so ruined? Isn't a country defenseless? And negotiations are very funny. How many idiots would let a head of state negotiate on someone else's territory? I can't stand it anymore after seeing this.

There is a lot of boasting and boasting. The protagonist is selfish and wants to be a big boss just for enjoyment. He is passive in everything he does. He can always pretend to be familiar with history and speak out to prevent tragedies from happening in the future.

It was okay at first, but gradually things started to go wrong. Do you still know about the father and son? Shunfeng Er. Later, the food was as well prepared as that of a wealthy young man who had never experienced any hardship. Has he really exhausted his talent?

Update soon, bitch! ! ! Two pages a day are enough for anyone to read. Give me 200,000 more for him. That's 20 chapters per person.

I don't know why I could write such a story. It's hard to understand the method of distilling refined salt.

Two more chapters, dragging on, and one chapter with very few words.

The writing style is okay, but I still give it 1 star because I came to rate it after seeing Chapter 17. You can make up history, but you can't make up physics.

Chapter 1 made me speechless. What kind of thing did the protagonist think he was? What kind of electronic fraud group could arrange a costume venue for him to deceive him!

It is still the same shameless style as always. The protagonist is either pretending to be crazy or acting stupid. There is always a second-generation idiot in the family. There are always a few idiots among the second-generation officials who meet. No matter how they are tricked, they can live and die. There are even more pretending ones, and then all kinds of slaps, all kinds of pretense, all kinds of pretending to be crazy and stupid. To be honest, the author is really worthy of his name!