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As a biochemical student, it is a daily routine from opening eyes to closing them.This directly led to until the next class, when Husky was leaning on the chair, closing his eyes and resting his mind against the clock, while devouring the lunch Xiang brought her, he saw Ermin walking away with her bag It wasn't until they came in that they realized that Ermin was really in their class.

In this class, Rodwick mainly talks about precision, accuracy, as well as manual error and experimental error.The students in the class responded very well. They were noisy most of the time, which was completely different from the science students who were immersed in taking notes in class. But how much did they really learn? Husky said that he would put a big question mark anyway.

It took half a class to finish the lecture, Rodwick gave them a 5-minute break, and then asked them to group themselves into groups of two to three to form an experimental group and then follow her upstairs to do the experiment.

As the prime minister's off-court support, Husky firmly believes that this is his duty. As for Heather, oh no, it's Ermin.The person who can make compound soup in the second grade, Husky really wants to know if her hands-on ability is as strong as Heather.

But the thing that almost made Husky's eyeballs fall out was that Ermin was alone, alone!All the people in front of her and on the right suddenly had friends, and she was the only one who sat in the empty seats all around in a little confusion, glanced at the lively and discussing crowd who came out of the classroom, and then He lowered his head secretly and packed his things.

Husky swallowed.

Are you guys blind?ah!

Shouldn't you be scrambling to get such a top student?ah!

With such a beautiful woman by my side to conduct experiments, the efficiency will be greatly improved!You can also feast your eyes. If she speaks with a London accent, it will be a double enjoyment of sight and hearing.Are your brains flooded?

How could you treat my goddess Heather like this!

Husky was roaring in her heart, but if she took the initiative to invite Ermin, she probably didn't have the courage...

Husky raised his head and looked at the ceiling of the classroom, if, if Ermin was really alone by then.So, will Rodwick appoint a team for Ermin?Well, then my group should, should be easy to be assigned, after all, there is only one in their group who really needs results.

"Aren't you leaving? Why are you dawdling?" Xiang walked out of the classroom, but she found that the husky hadn't followed, and walked back to the classroom again, only to see the husky dawdling behind Ermin's ass.

Husky looked at the picture, she pointed to Ermin again, and raised a finger.Xiang looked at Huskies inexplicably, not understanding at all.

Husky pointed to Ermin again, then shook his hand.Xiang immediately understood, "Ermin..."

"Can I join you guys?" Ermine asked as she turned around, looking at the huskies.

Husky's entire face turned red in an instant, and all her blood rushed to her forehead. "For example, if..." Husky squeezed his hand tightly, "You, if you don't have a companion... I, I can..."

"I didn't," Ermin said.

"Then, then we will..."

"Then let's go together." Lian Lian hurriedly said, if we delay any longer, I'm afraid this class will be over.

Ermin picked up the bag, she looked at the flushed husky, and walked out of the classroom.

"Sister." As soon as Ermin walked out of the classroom, the prime minister said, "Can you be more self-sufficient? If you don't give yourself some face, at least give me some. Can you not be in front of her, and you will be like a sufferer It's like a wronged little daughter-in-law. Show off your aura on the court and in the laboratory!"

"But..." Husky puffed her face, and she walked upstairs with Xiang, "That's... Ermin."

All the students gathered in the basic chemistry lab on the second floor, and Rodwick asked them to choose their own location.On each table are placed some glass equipment and a laboratory report. Rodwick led them to read the purpose of the experiment. All they need to do is to find a way to measure the error of the burette, and then ask them if there is anything they don't understand.

Such a simple matter...Husky thought in his heart, if he finishes it as soon as possible, he can also finish writing the experiment report by the way, and then maybe he can play Football Manager for a while at night.

After confirming that everyone has no problem, probably the group of people will not be able to ask any questions for a while. As soon as Rodwick let them start, Husky quickly brought the beaker he needed in front of him, and then put it in front of him. The electronic scale in front of you is reset to zero.

"What's your idea?" Ermin asked.Xiang bowed his head and began to write down the names of the three of them.

"It's very simple." Husky said, she used the largest beaker to take a cup of water and put it in front of her. She took the burette down, leaned on the operating table, took a funnel and put it on top of the burette, Slowly pour water into the burette. When the liquid level in the burette was about to exceed 20ml, Husky stopped. She took the burette to the operating table again, and after confirming that there were no bubbles in it, clamped it with a butterfly clip. good.

"At the current temperature, we can assume that the density of water is 1, that is, 10 milliliters of water equals 10 grams."

Husky said, she glanced at the beaker in front of her, took out a 50ml beaker from it, and put it under the burette.Husky carefully unscrewed the gate of the burette, let a little water down, then took the burette from the butterfly clip, made the scale of the liquid level with her eyes, and wrote down the scale of the liquid level.

"We first need to weigh the mass of the beaker and water, which is our original mass. However," Husky took the experiment report in her hand, and she directly turned to the experimental data, which was blank, and Rodwick said No settings or hints were given to them.

"I personally like to reset it to zero first." Husky stuck out his tongue at Ermin and pressed the reset button on the electronic scale. "This way we can save one more data."

"Next, let's measure out another 10 milliliters of water." As Husky said, he put the beaker under the buret again, unscrewed the gate, and watched the liquid level until the liquid level dropped to almost 10 milliliters. , Husky turned the gate down and stared at the liquid level intently until it was completely over.

"Now we only need to weigh the added mass in this beaker and compare it with 10 grams to know the error of this burette."

After Husky finished explaining, she put the beaker directly on the electronic scale, and wrote down the number 9.96 grams on the electronic scale in her scratch pad.

"Then the difference between it and 10 grams, that is, 0.04 grams is the error of this burette per 10 milliliters, that is, there will be an error of 10 milliliters per 0.04 milliliters. But of course, this is not very accurate, because the human eye There are also errors in the process.”

She was dazzled by the sight, and when Husky said something, she kept nodding her head.

"Interesting," Ermin said, and she glanced at the husky who was about to do it for the second time. "Can I try it?"

"Of course." Husky nodded hastily. She glanced at the burette, and there were still more than ten milliliters of water in it, which was enough for Ermin to conduct an experiment.

"The scale of this liquid level is also your starting scale." Husky stepped aside, and she asked Ermin to stand in front of the burette. "Your line of sight must be level with the liquid level, looking up or looking down will cause deviations in the readings."

"But," Ermin turned her head, "didn't you just say that our approach is not very accurate."

"That's right." Husky nodded, and she shrugged again, "But we have to work hard to minimize manual errors."

Ermin turned her head away. She looked at the liquid and slowly unscrewed the valve of the burette.Husky looked at the liquid level of the burette, and her body slowly squatted down as the liquid level dropped.

"Okay, okay, slow down, slow down, turn back a little bit, yes, don't stop. Okay, okay, okay. Close it." Husky clenched his fists and said.

Ermin paused as she put the beaker on the scale, which read 19.9 grams.

"So the difference between this reading and 20 grams is an error?" Ermine asked, looking sideways.

"Close but not correct." Husky pushed his glasses, "This reading is based on our previous reading, so we should use the previous reading as the basis. That is to say." Husky picked up the pen and wrote Write quickly on your own draft pad.

“用19.9克减去9.96克，我们得到9.94克。然后再用9.94克去和10克相比，得到的0.06克才是我们这一次的误差。”

After Husky finished writing, he turned his face and looked at Ermin, "Did you understand what I said?"

Ermin frowned slightly and nodded.

"Of course, under normal circumstances, we will repeat it three times to ensure the stability of the experiment." As Husky said, she looked at the burette again, and the height of the liquid inside was already less than 10 milliliters.Husky looked at Xiang Xiang, "You come here too?"

She gave Husky a sideways look, and walked to the burette to operate, but Husky stopped her.

"Now the liquid inside is less than 10 milliliters. Of course, although it is 5 milliliters or 6 milliliters, as long as the method remains the same, the error will not change too much, but in order to ensure the consistency of the experiment..."

Husky said, took down the burette and poured water into it again.Then she put the burette back on the butterfly clip, "You take the reading again now, and do it again."