Troubles in chemistry class, chemistry problems! Depressed!

Then you can change to a chemistry class.

And don't those who make trouble affect the mood.

You should see their shortcomings and despise them, and you should study harder instead!

Learning from a good teacher is the fastest and best way for most people in the world, but there is only one point. One thing that cannot replace the part of a person's learning experience is the density, the density of time that is keen to learn. Because of loneliness, it is closer.

So what can you do to make your life uplifted? The answer is very concise and straightforward: Tsinghua University or Peking University! Don't think it's something out of reach, set it up, and then move forward, and the rest is his business.

Handsome guy, do you want to have something intense?

Splash them with sulfuric acid

Haha, just kidding, don't do it?

Talk to the teacher Either the parents give some courtesy and sit forward and ignore others They didn't pinch you and didn't let you learn right, our class was also very messy It turned out that we had the same idea Later, we became numb and looked away Everyone has their own way of life There are times when they regret doing what they should do For you, a responsible child, there is no way but to do yourself with a clear conscience.

This shows that your self-control is not high enough, you can try to change classes.

Although it is difficult to keep your ears open to the window. But educational resources are limited after all!

Hide.

Self-control People with good self-control can learn in a noisy environment, and learning depends on themselves, not on teachers.

I'm also from Guangdong.,Now in my third year of high school.,Maybe it's someone who came over.。。

You still have more than a year to go, and that can change a lot. Now you're bothering about whether or not to turn physics, you've wasted a lot of time, and you can't control yourself from thinking about it, so you can turn to physics. Start everything from scratch, concentrate on studying, work hard in the summer, and add the following year, I believe you can learn well.

Besides, your ideal and interest is computer, and you can only report it by studying physics, and for the sake of your ideals, no matter how big the difficulties are, you can overcome them.

In addition, you said that your chemistry class is very noisy, don't blame the environment too much, no matter how bad the environment is, you mainly rely on yourself. At the beginning, Gorky's environment was so poor, and in such a family, he did not become a writer. Lenin also often read books at the Bolshoi Theatre, which could also be undisturbed.

So it's up to you. I believe that you will be able to overcome yourself and achieve success.

In addition, after the third year of high school, you must not relax, follow the teacher, and review step by step. In addition, you can't be biased, and the consequences of bias are very serious. Science comprehensive is the best subject to get points, so you must get more points. Remember, don't let up!

I wish you all the best in getting into your dream university, hehe.

I often encounter problems like yours, but I hope you don't give up, have dreams in your youth, and be brave to chase them. I believe you.

Physics is not difficult, as long as you have the confidence and perseverance!

To learn physics, you must thoroughly grasp the basic concepts!

I also chose chemistry, but I am from Nanjing, we choose chemistry to learn physics, in fact, cultivate a little more interest, the topic is as high quality as possible, so that there is self-confidence, interest is also there I wish you progress in your studies.

My past experience has taught me not to do what I regret when I choose.

But if you have already chosen, then even if there are regrets, even if there are setbacks, you have to continue to move forward, because even if you start all over again, don't you think it will be very tiring?

Especially in high school, the most important thing is to ensure a stable state of mind, so it is better to be clear about your goals.

What you want.

Follow your dreams! Support your own inner thoughts.

You are good at liberal arts, what are you afraid of, you will switch to physics if you turn to physics, I studied chemistry, I didn't finish the college entrance examination questions, and physics is not very difficult, don't waste time.

Don't be too nervous, haha, talk and laugh more. You try to do the 2009 chemistry questions, I am like this, this year I scored 127 points in chemistry in the college entrance examination, but I usually only about 90, this score is so enviable, right?

There are some problems that have been solved without thinking about how to solve them!!

Chemistry pursues new types of questions...

But it's all old content...

As long as the usual questions are done well...

I didn't say that I couldn't take the test.

To be able to guess. Dare to guess,,, after guessing, you can use the original question to verify.

It is important to understand ... No matter what the topic is, it is based on those principles, it is recommended that you cultivate more interest, if you like to learn, you will feel that the improvement is very hit... As for how to cultivate interest, this question is quite difficult to study...

I just didn't like math at the time, but I liked chemistry very much, a big problem, I listed the equations, and then I didn't know how to solve it...

But I also got better grades in chemistry! It's because I like it, of course, it's definitely a bad behavior.

Look at the previous exam papers and standard answers to understand how some questions should be answered, and some questions are dead, just like asking you about the experimental steps, you know that a blank is filled in and filtered, and there is a blank behind, then it must be filled in and washed.

Don't be greedy when taking the chemistry exam, don't think that you have to finish every question, it's impossible.

To study, you should read more previous exam papers, see where you are the weakest, and ask teachers and classmates more.

Zhou Hongwu said.

As long as 70% of the college entrance examination is answered correctly, you can go to the key points.

People have to be satisfied.

The Chemistry Network may be useful to you.

It is recommended that you buy a basic question + a medium and high difficulty question to do! Recommended for you to sell.

The Handbook of Difficulties and Difficulties" edited by Wang Houxiong, I bought it, and I am only a sophomore in high school like you, and at the end of last semester, I could only score about 70 points in chemistry, and I scored 98 points at the end of this semester, so I highly recommend you to buy it.

I think that although the chemistry topics are new (such as those experimental questions), the knowledge points to be tested are similar, mainly depends on whether you want to get the knowledge points to be tested, the multiple-choice questions should be practiced more, and if you don't understand, you should ask the teacher or classmates, and when you do the fill-in-the-blank questions, you should start with the basic knowledge points, and you can also set up a wrong question book, I believe it will be very helpful to your chemistry!

I won't just ask the teacher for the right time.

I've just graduated from high school, so let me tell you what I think

Maybe you've heard a lot of these words, but what you still have to say is to grasp the "basics" and flip through the previous notes more (if not, borrow it from the classmates who study well in the class, believe me, you will know how important notes are in the third year of high school!). Chemical equations and important substances have to be memorized.

When I was in my third year of high school, my teacher always emphasized to us that we should memorize the first 36 elements, as well as the position of each element on the periodic table (this seems a bit early to you, but there is no harm in memorizing it early).

You're only in your second year of high school now, although you have been wasted for a year, but as long as you work hard, you can still catch it. I don't know if you're **, I'm from Jilin Province, we have an optional question in the college entrance examination, which is to choose one of the material structure and organic (you should be studying or learning organic in the second year of high school now), the trend of our entire science class is to almost choose to do material structure in the college entrance examination (because the organic elective question is really difficult), so if you are similar to our teaching system, organic really can't learn some basic (I regret it now, at that time I put the time to learn organic on the physical structure, because this year's Jilin Provincial College Entrance Examination did not have organic questions except for optional questions, and as a result, I chose to do or choose the physical structure--

You don't have to be in a hurry, because you can't learn it right away if you're in a hurry, learning chemistry is a process of slow accumulation. So take it with your heart, because you still have two years to go!

When you are fine, you can flip through the annual college entrance examination science comprehensive papers, in fact, chemistry is relatively simple, the key to science and comprehensive is to see whether your physics is good or not, so as long as you don't let your chemistry give you a lower score, or it is better to be able to give you a higher score!

Buy the materials yourself and come back to do it, ask for a tutor.

It takes effort to make up for it, and there is a price to pay for playing well in the first year of high school.

If you're afraid of hardship, you can't do it.

Make a good book by yourself Good inscription to remember often Very useful just graduated floating.。。。

I'm also just a sophomore in high school, and I think chemistry has suddenly become more difficult, so as long as I listen to it now, and I have a good time to follow it when I review in my third year of high school, it won't be too bad.

But you won't be a scholar.

Hahaha, you're going to work hard, and by the way, I'm a freshman in high school.

If there is no sodium carbonate, the total mass of the reaction should be: 10 + 50 + 60, but the remaining mass is, the mass is reduced because carbon dioxide is generated, and the mass is, so this question is answered as follows:

Solution: If there is a problem, it can be known that the mass of carbon dioxide generated is, and if the mass of sodium carbonate in the sample is x, then it can be obtained:

na2co3+2hcl=2hacl+h2o+co2↑x

106 x=44 solution x=

It can be seen that the mass of sodium hydroxide in the sample is 10g-2, 65g=, and the mass fraction of sodium hydroxide can be found =

A: The mass fraction of sodium hydroxide in the sample is:

: The mass of carbon dioxide produced can be known to be the question, and if the mass of sodium carbonate in the sample is x, then we can get:

na2co3~co3

x106 x=44 solution x=

It can be seen that the mass of sodium hydroxide in the sample is 10g-2, 65g=, and the mass fraction of sodium hydroxide can be found =

A: The mass fraction of sodium hydroxide in the sample is:

10 grams of sample plus 50 grams of dilute hydrochloric acid for a total of 60 grams.

You have the last gram left, that is, there are grams of CO2 running away.

CO2 is grams, CO2 is derived from Na2CO3, and the amount of sodium carbonate can be calculated.

The calculation is up to you, I won't do it for you.

Baby, this question is very simple, just write the equation for the reaction of hydrochloric acid with sodium hydroxide and sodium carbonate and calculate it.

In fact, everything is the same, just find the right method, but there are many people who are not naturally suitable for learning certain things, such as most boys are not as good as girls in foreign languages, and most girls are always not as good as boys in mathematics?

Why?! For example, my chemistry is good, but my other liberal arts are only sad.

Don't talk nonsense, talk about my experience in chemistry, I hope it will help you in the writing of chemical equations, your attention to conservation, matter, electrons must be conserved, consider the problem comprehensively, the reaction of matter should pay attention to whether it is excessive, what reaction will occur in excess, acid and alkali are different in concentration, and the reaction will be different when the concentration is high or low (maybe too much). Now it may not be used, and it seems that the high one is mainly a redox reaction, and the understanding of the element table)

Remember a few constants, the formula is actually very simple, use more and you will be cooked, remember a word, conservation!!

It's important!! All matter must be conserved, and those of unknown origin must figure out how it came to be!!

Hehe, you're a girl, right? You can try to write down the formula on a piece of paper, and then do the problem against it, and you will become familiar with the amount of matter, and there is no shortcut.

Chemistry is based on experiments, I hope you do more experiments, and then you can master it, I used to do that. Interest is the most important thing, but the equation must be memorized, and chemistry cannot be learned without it.