What are some interesting things you ve experienced while doing chemistry experiments?

On that day, it was a teaching experiment of coarse sample purification, and the white sample mixed with impurities was packed in a large brown reagent bottle, which had been used for too many years and the label was blurred. The bottle was placed on the laboratory bench at the front of the laboratory, and next to it was a bottle of laundry detergent that was usually there, also in a similar bottle. The first group of students who went to weigh the sample, I don't know if they didn't wake up, they actually weighed the laundry detergent as a sample for experiments, and the students behind didn't think much about it, so they weighed the bottle of laundry detergent ......Half an hour later, the teacher came to the laboratory and found that everyone's Erlenmeyer flasks were bubbling, and then he found out the problem.

When I was a freshman in high school, in the first chemistry class, in order to arouse everyone's interest in chemistry, the teacher took some drugs to do experiments on the spot to show us, and I was unfortunately selected to be an assistant. In this way, the reaction produces heat, and the cotton will catch up, and as a result, the sodium peroxide is a little spoiled, and it is not pure, so I will blow it, but it will not happen, but there is a little spark that spreads slowly, and then the cotton emits a lot of smoke, and then my classmate said to me, look at you blowing and wiping your tears on it, and you feel so sad ......

Inorganic chemistry experiments, synthesis of polystyrene pellets. The experiment was divided into two days, two groups per day, and two laboratories to do the experiment, I was on the first day, and the god of high gathering was on the second day. On the first day, to put it simply, about 70% of the people (including me [hiding my face and crying]) made a lump of mud ......The next day, the god of high gathering came out, and things started to get dramatic......The god of high concentration easily achieves ultra-high yields, and the small balls made are beautifully shaped, rounded and smooth, ......The experimental class where the god of high gathering is located, most of the reactions are bloody.

The lab next door was said to have been almost completely wiped out. However, the Jianghu people said that Lin Shen's boss successfully saved his yield, and the only difference between his experimental conditions and others was that he put the ** of the God of High Gathering next to the experimental device......

Our experimental group, this semester has not been successful since the beginning of the experiment, a usual experiment to prepare hexanediol, the fairy wearing the fairy to do the experiment, looking at his little skirt fluttering mood is about to fly, add the reagent and the next step is to heat up As usual, I raised the temperature of the oil bath Rising, the test agent exploded! Damn it! It's exactly the same as shi!

At that moment, I felt like a little fairy who fell into a dung pit, and then I asked the teacher for leave to go back to wash clothes, and I felt that walking on the campus of Nuoda University, I was the most beautiful scenery! I haven't had such a high rate of return since I was born, but I wasn't very happy.

The third party of junior high school, the experimental training of the high school entrance examination. Chemistry experiments use something called distilled water. The teacher told us not to mess around, don't get the water dirty, I thought that there was so much distilled water from the school", and tasted it.

Well, it's a bit stinky......Until one time the teacher asked me to get some distilled water, I asked where to get it, and the teacher said ......The pool next to the cafeteria is .........

High school homeroom teacher, chemistry teacher, super serious, super low voice, the whole school attack, a class to demonstrate the operation of the distillation experiment, forgot to add broken porcelain, no one in the class dared to remind him, began to heat up after a while he found out, suddenly quiet, squinted his eyes and looked at the flask for a while, and said: "Okay, now let's observe the boiling phenomenon." ”

In the third year of chemistry experiments, I did solid alcohol. After finishing it, the teacher ordered the students to make solid alcohol one by one, and found that none of them could be lit. Then the teacher analyzed that you must have not controlled the temperature when you did it.

Until, a classmate found that the raw alcohol could not be lit. Later, I learned that it was the wrong logistics to prepare alcohol.

Tell me about a chemistry experiment I once did. Haha, at the same time, it is also very heart-wrenching, procaine hydrochloride preparation experiment, the temperature of the electric heating jacket is too high, the liquid in the flask is all carbonized with lightning speed, the bottle has not been washed for three weeks, and ultrasound can't save it.

The teacher was talking about the solution, saying: "The solution is composed of solutes and solvents, such as salt water, the solute is salt (sodium chloride) and the solvent is water, so the aqueous solution of salt (sodium chloride) is called salt water, iodine wine, the solute is iodine, and the solvent is alcohol, so the alcohol solution of iodine is called iodine wine." After a while, the teacher asked a classmate what the solute and solvent of hydrochloric acid were, and the classmate said:

The solute is salt, and the solvent is acid, so the acid solution of salt is called hydrochloric acid," the students laughed when they heard it.

My partner in the inorganic chemistry experiment is a girl, I remember the determination of the pH of the solution, 19 dropwise add 22ml of sodium hydroxide solution of the same concentration to acetic acid, pH is 521, both of us were a little embarrassed when we saw the number, and her face turned red.

Biology class (yes, biology) I was bored with the reagent bottle and dumped around, and after I added Cuso4 to the mixed solution of H2O2 and NaOH, it suddenly started to bubble profusely, generating heat, and black suspended solids. Later, I played for half a lesson, changing the order of addition and the dosage. After thinking about it for more than an hour after class, I finally came out with a cuprous oxide precipitate.

I think I'm probably the only middle school student who knows that alkaline hydrogen peroxide can reduce copper hydroxide.

It's nothing, it's just a ...... to grab naoh with your hands

I tried! Alcohol lamps can be blown out! Nothing happened, it was safe, and the teacher wouldn't let us play with fire.

Someone stole some sodium and threw it in the lake.

—Because the school I attended in junior high school focuses on practical and hands-on ability, and often arranges students to participate in various experimental courses, we have conducted many interesting chemistry experiments in the chemistry classroom under the guidance of our chemistry teachers.

Chalk bombs

Before the experiment, the teacher gave each person two pieces of chalk, and we dug a hole of a certain depth at the thick end with the handle of a medical spoonTake a small amount of red phosphorus and potassium chlorate solid according to the ratio of 2:7 into the mortar, mash and mix with a pestle, add an appropriate amount of absolute ethanol, soak the mashed powder fully, and mix evenly with a spoon.

Then use a spoon to add the mixed red phosphorus and potassium chlorate to the dug chalk holes, seal them with white paper and rubber bands, dry them by the teacher, and return them to us three days later.

Place the chalk bomb after dryingSeal a section with white paper and drop it firmly to the ground, you can have a ** effect similar to firecrackers.

Homemade CO2 fire extinguisher

Before the experiment, the teacher will send each of us outA glass container with a side opening and a small plastic bottle, a pack of baking soda and a glass of white vinegarFirst of all, we need to pour baking soda powder into the glass bottle, then fix the plastic cup in the glass bottle with iron wire (the position should be lower than the side opening), pour the white vinegar into the plastic bottle, gently seal the rubber stopper on the bottle mouth, and finally seal the glass bottle mouth tightly with a stopper.

Hold the bottom of the glass bottle with both hands and seal it respectively, and quickly flip the bottle overThe plastic bottle stopper is pushed open by gravity, and the white vinegar inside quickly flows out and mixes with baking soda, so that the reactants gush out from the side opening above the glass bottle, so as to achieve the effect of a fire extinguisher.

Hydrogen**

React with zinc and dilute sulfuric acid to generate hydrogen, collect the generated hydrogen into a plastic bottle with the downward air exhaust method, and turn the bottle upside down after a period of time, light a match, and place the match at the mouth of the bottle to make the hydrogen occur, and the plastic bottle flies upward.

Summary: Some schools only pay attention to the teaching of textbook content and do not pay attention to experimental courses, but in my opinion, experimental courses are not only conducive to improving students' hands-on ability, but also conducive to us to transform the knowledge in textbooks into practice, stimulate our interest in learning, enhance our memory, and are worth promoting.

——— because the high school I studied was a high school, I had many opportunities to practice science experiments during my time in school, and I did elephant toothpaste experiments, pharaoh's snake and hydrogen and oxygen mixture** experiments, etc., these three experiments were the most impressive experiments I did in high school.

The first is the elephant toothpaste experiment.

This was an expanded experiment when the chemistry teacher introduced us to hydrogen peroxide in class, but what we didn't expect was that the teacher arranged this experiment for us shortly after. The main process of the experiment is to mix the concentrated hydrogen peroxide with soap and stir it evenly, plus some potassium iodide as a catalyst to catalyze the rapid reaction, and soon you can see the test solution in this Erlenmeyer flask gushing out. It is important to note that the concentration of hydrogen peroxide must be greater than 30%.

Because the liquid sprayed resembles elephant toothpaste, it is called an elephant toothpaste experiment.

The principle of the experiment is mainly that hydrogen peroxide decomposes rapidly, decomposes a large amount of oxygen, and then combines with the foaming agent to produce a large number of bubbles. During the experiment, it is necessary to pay attention to the corrosive nature of high concentrations of hydrogen peroxide, and the heat phenomenon is accompanied by the experimental process, so personal protection is required.

This was followed by the brown bread experiment.

This experiment is an experiment arranged for us by returning to the chemistry textbook that concentrated sulfuric acid can carbonize sugar.

This experiment was based on the Pharaoh's Serpent Experiment. The original Pharaoh's Serpent experiment used mercury thiocyanide to decompose it by heat, but because mercuric thiocyanide is highly toxic, we used white sugar as the raw material for this brown bread experiment. The process of the experiment is very simple, only need to add a large amount of white sugar to the beaker, then pour concentrated sulfuric acid and stir quickly, use the dehydration of concentrated sulfuric acid to quickly oxidize and carbonize the sugar, and then a black sponge-like solid will be produced in the beaker and continue to extend out of the beaker, and produce a large amount of white gas.

After adding the material, it should be quickly kept away from the beaker, do not touch the black solid produced is easy to cause corrosion, and the gas produced is sulfur dioxide, do not inhale, pay attention to maintain ventilation.

Finally, there is a mixed light experiment with hydrogen and oxygen.

Because of the danger of this experiment, this experiment was done by the teacher on our behalf. Under normal circumstances, hydrogen and oxygen will produce a pale blue flame when ignited, but if two gases are mixed 1:1 and then irradiated with strong light**.

**The power should not be underestimated, in the process of the experiment also need to do a good job of protective isolation, wear good goggles, when the beginning of the line of our teacher used two glass covers to conduct experiments, and finally the inner layer of glass covers was completely broken.

Doing these interesting scientific experiments can increase our understanding of the principles of experiments, increase our interest in scientific experiments, improve learning efficiency, and improve our ability to practice.

There will be some funny things happening, some experiments will be done with some objects in the life ascension letter, it will bring people a different feeling, and they will use the knowledge they have learned to make some small items to solve some life needs, which is more talented than the noisy wheel.

These things are that there will be some conflicts with your friends, conflicts with your friends, conflicts with your friends because of academic problems, you can't understand what the other party is saying, and you will also question what the other party says, these are all things that will happen.