psychochemist

Chapter 469 Greedy Aqua Regia

If you don't know it, you can't do it yourself.

Yu Fan scolded the fat boss.

Everyone else present was at a loss.

The fat man's face was shocked at first, and then he immediately regained his composure. He said, "Glasses, were you talking to me just now?"

Yu Fan took a step forward, followed by Chen Xingyang and Guo Na.

Yu Fan: "Boss, you know that this aunt bought the gold bracelet to prepare a dowry for her daughter, right?"

Fat man: "I know, didn't the aunt just say it herself?"

Yu Fan then asked sharply: "Then you can see how hard it is for this aunt to save the money?"

The fat man didn't answer and chose to remain silent.

Yu Fan: "Just now you plausibly said that your business is all about conscience. I think your conscience has been eaten by dogs!"

The fat man seemed a little unhappy, covered the small glass jar with a cardboard case, and carried the small glass jar back under the counter.

The fat man said to Fan: "Uh, for business cooperation, let's talk about it later. Let me talk about it. I will help this auntie wrap the bracelet first, and I will serve you after I finish my service." The fat man said while For Fan winking, there seems to be a little pleading in his eyes.

The middle-aged woman next to her was completely bewildered, she stood there blankly, not knowing what happened, she thought to herself, maybe the fat man has messed with someone.

The fat man quickly wrapped the gold bracelet and stuffed it to his aunt.

At this time, Yu Fan took another step forward and said to the middle-aged woman, "Auntie, please use your scale to weigh the weight of the gold bracelet now."

The middle-aged woman had a question mark on her face and muttered, "What do you mean?"

Yu Fan smiled and said, "You should be more cautious when choosing a dowry for your daughter, shouldn't you?"

The middle-aged woman nodded, opened the wrapped bracelet, took out the scale from her arms, and put the bracelet on it to be weighed.

"Ah!!!" The middle-aged woman exclaimed, "What's going on? Why is it so much lighter?"

The fat man wiped the sweat off his face with his hands, not daring to meet Yu Fan's gaze. Panting, the fat man picked up a magazine and fanned himself.

Chen Xingyang sarcastically said, "It's only spring, and you're so hot?"

"What's going on? What's going on?" The middle-aged woman was very anxious, "Fatty, what kind of magic did you do? Where's my gold?"

Yu Fan said coldly: "He didn't use magic." Yu Fan paused, "It's chemistry!"

As soon as the words came out, the fat man wanted to find a crack in the ground and get in.However, this fat panda with big ears is too bloated and can't go anywhere.

The middle-aged lady pulled Yu Fan's sleeve and asked, "Young man, what happened?"

Yu Fan patiently explained: "Auntie, just now the fat man pretended to be kind enough to clean the gold bracelet, not only washing off the dirt on it, but also 'washing' off your gold! The liquid, nothing else, is the unscrupulous - aqua regia!"

Middle-aged woman: "Huh? Aqua regia? What kind of water is this?"

Guo Na explained to the middle-aged woman on behalf of Yu Fan: "Aqua regia, aqua regia is also called 'wang acid' and 'nitro hydrochloric acid'. It is a very corrosive liquid with yellow mist. A mixture of hydrochloric acid (HCl) and concentrated nitric acid (HNO) at a volume ratio of 3:1. It is one of the few liquids that can dissolve gold (Au), and its name is derived from its strong corrosiveness. Come."

The middle-aged woman asked suspiciously: "Why? Why did he do this? It won't do him any good if my gold is melted away."

Yu Fan went on to explain: "Put gold jewelry into 'Aqua Regia' to dissolve by a percentage, and it only takes a few seconds to ten seconds for your gold jewelry to decrease a lot, and the reduced gold will dissolve with 'Aqua Regia' Together, they are in the form of ions in the solution. After you leave, the fat man will replace the gold-containing 'aqua regia' to remove the gold, such as iron, aluminum, copper, etc., whichever is cheaper , It can also be replaced by sodium sulfite in industry.”

Guo Na concluded: "That is to say, the gold that has been washed away will return to the fat man's hands in a sudden change." Yu Fan and Guo Na sang and explained clearly.

The middle-aged woman came to her senses, and after a long time she was almost cheated. She angrily reprimanded the fat man: "You...you big liar! You will cheat my daughter's dowry! Where's your conscience?"

The fat boss lowered his head and muttered in a low voice: "I rely on my ability to make a living, why should I be called a liar. Besides, the price of this gold bracelet I sold to you is so cheap, how can you find this price in those regular gold shops?" You were not fooled because the picture was cheap..."

"You...you..." The middle-aged woman was so angry that she couldn't speak clearly.

The fat man took the money out of his pocket, stuffed it into the middle-aged woman, and said, "Forget it, let's go, I won't do this business, it's really bad luck."

The middle-aged woman threw the gold bracelet on the fat man's face, put away the money, and left angrily. She took a few steps outside, then suddenly remembered something, and came back again.

The middle-aged woman bowed slightly to Yu Fan, said, "Thank you, young man." She turned and left.

Yu Fan felt warm in his heart, looking at the back of this old aunt who was worried about his daughter, he felt the joy of helping others.

However, just as Yu Fan was looking outside, the fat boss at the counter behind him stood up quietly, holding a hammer in his hand, and hit Yu Fan on the back of the head.

ah? ! !A scream!
Yu Fan fell to the ground.

Did this iron hammer hit Yu Fan?
No.It turned out that at this critical moment, Chen Jianyang pushed Yu Fan away with sharp eyesight and quick hands. The fat man missed it. Twist, the hammer fell to the ground.

At the critical moment, Chen Jianyang rescued Yu Fan again. It has to be said that without Chen Jianyang, Yu Fan would have received the lunch a long time ago.

Chen Xingyang satirized the fat man and said, "Oh? Are you brave? How dare you sneak attack?"

Not only did the fat man not panic, but he sneered and said, "Hehe, do you guys know who I am? Dare to do this business, dare to open a shop here. Do you think I'm a vegetarian?" The fat man tried hard, trying to break free.

Chen Xingyang pressed it down again, this time even tighter, the fat man's face was firmly pressed against the glass counter, and he made a sound of ouch.

The fat man became anxious now, and scolded: "Don't you know that I am a gangster? You dare to meddle in my own business, and you still dare to mess with me? Okay, you can do it, today I will let you know who is the father!" The fat man finally broke free and stood up.

Chen Jianyang unhurriedly took out the police badge from his pocket and waved it in front of the fat man.

The fat man fell to his knees with a plop, and humbly called out, "Father!"

　A wise man knows what he can do; a wise man knows what he cannot do - Methamphetamine
　　
　
(End of this chapter)