Question 181, 10 marks for this question.

"Hiss"

When the 181st question pops up on the computer screen, it is no longer a multiple-choice question, but a big question with a score of 10 points! Zhang Baobao's hand gently removed the mouse, and until now, he still maintains a 100% correct rate, and the 10-point question in front of him is absolutely careless!

Maybe this question can determine the gap between himself and the three super powerhouses of the Guangming City Noble Middle School team. In all the multiple-choice questions I did just now, I was just confident that I could have some advantages in terms of speed, but in terms of accuracy and score, I couldn't really leave the super powerhouses Lu Yun, Wang Yiling and Xiao Jingjing behind.

And if you make a slight mistake in this 10-point question in front of you, you will lose all your efforts!

The more the competition is fought to the end, the more serious and careful the contestants must be!

181. Iodine and its compounds have a wide range of uses in the synthesis of agents and drugs.

Answer the following questions:

(1) A large amount of iodine is enriched in seaweed, concentrated after leaching with water, and then added MnO2 and H2SO4 to the concentrate to obtain I2, and the reduction product of the reaction is ____________.

(2) the above-mentioned concentrate contains I-, Cl- plasma, take a certain amount of concentrate, add AgNO3 solution dropwise to it, when AgCl begins to precipitate, the C(I-)/C(Cl-) in the solution is: _____________, known Ksp(AgCl) = 1.8×10-10, Ksp(AgI) = 8.5×10-17. [

(3) It is known that the ΔH= +11kJ·mol-1 in the reaction of 2HI(g)=H2(g) + I2(g), 436kJ and 151kJ of the chemical bond break in the 1molH2(g) and 1molI2(g) molecules, respectively, the energy to be absorbed when the chemical bonds are broken in the 1molHI(g) molecule is ______________kJ.

(4) Bodensteins studied the following reactions: 2HI(g)===H2(g)+I2(g)

Predict the relationship between the amount of hydrogen iodide in the gas mixture x (HI) and the reaction time t at 716K?

In the face of this big problem that exists like a behemoth, I am afraid that students with a smaller amount of theoretical knowledge of everything will immediately faint, and this kind of defeat of the candidate's psychological defense line is often the most important in the competition!

In the face of the problem, I don't even have the courage to do it, and I still don't stop?

But Zhang Baobao is different, Zhang Baobao now has the courage to face all problems, never evade, but face difficulties, no matter how many difficulties and obstacles ahead, Zhang Baobao is bound to clean them up!

Calming down, Zhang Baobao seriously analyzed the question.

(1) In the question, the question of adding MnO2 and H2SO4 to the concentrated solution of iodine element can be transferred with the help of the method of preparing * in the laboratory, so that it is not difficult to think that the reduction product should be MnSO4.

(2) In the question, silver chloride and silver iodide both belong to precipitation, and there must be a balance of precipitation transformation in the same solution, so it is not difficult to find the answer by using the solubility product constant of silver chloride and silver iodide two precipitates!

(3) In the question, the answer can be calculated by subtracting the total bond energy in the reactant by subtracting the total bond energy in the product.

(4) It seems difficult to ask, but it is actually simple, just need to apply the reaction rate and balance movement to break through!

Thinking about it, Zhang Baobao typed the answer in his heart on the keyboard!

The computer screen then displays the words "10 points for getting it right".

Yes！

Zhang Baobao doesn't even need to do calculations on the draft first, just by thinking and calculating in his own mind, he can completely finalize the answer, this ability is undoubted!

……

"Tick!"

With a sharp and loud beep from the horn, the first round of the national competition theoretical knowledge competition came to an end!

In the same way, the scores of all the contestants will be verified in the background and finally displayed on the results panel on the big central screen!

Everyone, all staring at the results panel on the big central screen!

Gao Meng, who was not far away, looked nervous, and his palms were constantly beading with sweat, what kind of results would the existence of the top students in Hexi Province achieve in the first round of the national competition?

Gao Meng didn't have any bottom in his heart, after all, when he entered, he had already seen so many awesome people! He was looking forward to being able to rank among the elites in this group, and at the same time he was very worried.

Lu Yun, who was on the other hand from the Noble Middle School in Qingming City, looked relaxed, although his eyes were also looking at the results panel on the big screen in the center, but the light wind on his face was in stark contrast to the competitors around him!

He has the bottom in his heart!

It seems that the champion of the national competition has been locked by him long before the start of the competition! And the announcement of the results is just a process of walking and walking!

The confidence shot in Lu Yun's eyes was like a sharp sword, and all the contestants present seemed to have been killed by him!

There is no vanity under the fame, at the moment of announcing the results, Lu Yun's performance just shows the strength of his strength! Even Zhang Baobao saw it, and he unconsciously "chuckled" in his heart.

"Tick!"

With a crisp sound, the big screen in the center showed the list of 8 players who entered the 2nd round of the actual competition!

First place: Wufang Municipal Experimental Middle School, Shuobei District, Hexi Province, Zhang Baobao, with a total score of 1020 points.

Second place: Capital Guangming City Noble Middle School, Lu Yun, with a total score of 1017 points.

Second place: Capital Guangming City Noble Middle School, Xiao Jingjing, with a total score of 1017 points.

Fourth place: Capital Guangming City Noble Middle School, Wang Yiling, with a total score of 980 points.

Fifth place: Guangmen Middle School in Guangming City, Jiang Wei, with a total score of 720 points.

Sixth place: Xicheng Middle School in Guangming City, the capital, Jia Yong, with a total score of 600 points.

Seventh place: Dongcheng Middle School of Guangming City, Lu Silong, with a total score of 597 points.

Eighth place: Haidian Middle School in Guangming City, Tang Jun, with a total score of 540 points.

As soon as the results were announced, the audience immediately exploded!

"This!! this...... What the hell is going on!?"

"Are you sure it's not the computer screen that's going wrong?......

"The first place is not even Guangming City Noble Middle School......?

"Who is Zhang Baobao, how can you ......!?"

"I don't understand!"

"This achievement! impossible! impossible! I want to complain! I absolutely have to complain!"

……

In the midst of the noise, Lu Yun's face gradually changed from a light breeze just now to a look of astonishment! He couldn't believe it! He couldn't believe his eyes! He couldn't believe the result in front of him!

I should be the first place! There can be no accidents! How could it be?

My Lu Yun's strength, no one in the entire Guangming City knows, who doesn't know!?How is it possible!?

I think I, Lu Yun, have been in contact with the Four Spirits since he was three years old, and his father is also the director of the Pearl Country's War Readiness Materials Mobilization Center, since he was a child, Lu Yun doesn't know how many rare plants and elixirs he has eaten, and the exercises he cultivates are also family heirlooms! For more than ten years, he has diligently cultivated the Four Spirits every day, and his theoretical homework has been studied hard every day, and he never dares to slack off in the slightest!

For more than ten years!

Even during the holidays, other children go out to play, but I still insist on completing my daily tasks! I hardly feel any joy in my whole childhood!

Do I pay less?

First place, why not mine!?