What happens to eggs in vinegar Keep an observation journal one day at a time .

Today, I did a little experiment and the research question was: Can egg shells soften in vinegar?

I'm almost thinking, can the eggshell soften? This problem made me restless, so I did a little experiment with vinegar. I'm so happy, I thought

If I succeed in this experiment, it will be a trivial matter to peel egg shells in the future! We don't have to peel it off in a small piece, a small piece in the future.

The experiment was not difficult, we just had to put the egg shells in vinegar. Let's pour half a bowl of vinegar first, and then put the egg shell into the vinegar, and now, the egg shell floats on top of the vinegar.

What will happen to the shell of this "vinegared" eggshell next time? Let's keep watching!

February 16 Weather: Sunny.

Today, I took another look at my "vinegared" eggshell, ah! Eggshells, soft! I can't even get the eggshells out of the vinegar!

When I learned the news, I was overjoyed, ecstatic, and pleasantly surprised! However, I had no idea how such a hard eggshell could be soft.

Students, do you know? I don't know! So let me tell you by looking it up!

Oh! It turns out that the eggshell itself contains a lot of calcium carbonate, vinegar is a weak acid, and calcium carbonate will generate calcium hydroxide under the condition of water and gradually neutralize the reaction with vinegar, so the content of calcium carbonate in the eggshell becomes less and soft.

Students, do you know why?

I hope that students will do more experiments in the future, you see! And I did!

Darkening yourself and looking at it day by day).

When writing a diary, write the date in the middle of the line before the main text, sometimes only the month and day, sometimes including the year, month and day, and then the day of the week, and if necessary, the weather conditions of the day. After that, you can start writing the text with two blank spaces on the next line, which is the basic format of the diary.

So, what should I pay attention to when writing a diary?

1) Don't be restrictive. First of all, the content should not be limited to writing about what happened today. Diaries can be used to record events, scenes, people, objects, travelogues, and so on.

And you can also write about the after-reading and viewing feelings. However, in the writing of group sales, do not write it as a running account. For example:

The memorization should indicate the time when the event happened, the place where the joke happened, the person, the cause, the process, and the result. In particular, the process of the incident must be detailed, vivid, and detailed. To write a scene, it is necessary to grasp the characteristics of the scene.

Writers grasp the characteristics of characters, and there can be physical descriptions, action descriptions, language descriptions, psychological descriptions, etc. The diary is not afraid of learning, in addition to the teacher's teaching, you must always see how others write! Don't write your own, your thinking will be limited!

2) I think there can be a little fiction in the composition, but the diary is exempt! Be authentic. It doesn't matter if the diary is sometimes written as a running account, as long as the sentences are smooth, and the real things that happened in the day are recorded!

In this way, students will no longer see journaling as pressure, but will love journaling!

3) Learn to apply what you have learned. A good diary is to learn to write down the beautiful sentences learned in the books often, and learn to express life with beautiful sentences!

4) Finally, at the end of the diary, I don't approve of writing like an essay, there must be feelings or something, it doesn't have to be the same, sometimes I say, "At the end of the day, I should sleep .......""It's good to be the ending, it's real!

Today, the teacher gave us the task of going home and putting the eggs in a bowl filled with vinegar to observe how the eggs became soft, and I was very interested in this experiment.

As soon as I got home, I quickly asked my mother to prepare an egg and a bowl of vinegar. I put the hard-shelled red-skinned eggs in a bowl filled with vinegar, and on the first day, I noticed that the eggs had turned from red to white, and there were red threads on the surface, like fibers. The next day, the eggshell begins to soften, and with a light touch of your hand, the eggshell will sink in.

On the third day, the egg was softer than yesterday, if you press it hard, the egg will break, and there seems to be some egg whites running out, maybe I pressed too hard, and there were cracks in the egg shell. On the fourth day, I couldn't wait to go back and look at it, and found that the eggshell was soft like a balloon filled with water.

Through this experiment, I was inspired by the fact that vinegar has a softening function, so it's no wonder that people like to drink vinegar so much. Vinegar can also sterilize!

Categories: Education, Science, >> Learning Aid.

Problem description: The longer the better, I am a small bun of degree.

Analysis: Do experiments, I've done this experiment ......

Actually, I don't need to write too long, I'll tell you the main phenomenon.

1. After adding white vinegar, after a period of time, many small bubbles are attached to the surface of the egg shell. (Because the main component of egg shell is calcium carbonate, white vinegar contains acid, and calcium carbonate reacts with acid to form carbon dioxide gas).

2. After 2-3 days, the surface of the egg shell becomes soft and there are fine chips.

There are two ways to do this:

1) Rinse the eggs with water and gently rub the surface of the egg shell with your hands so that the egg shell is completely separated from the egg shell, so as to obtain a soft egg (a white translucent film wraps the egg white and yolk).

2) Change some vinegar (in order to speed up the number of eggshells), so that after about 15 days (change the vinegar every 2-3 days), the eggshells can be reflected, and the things obtained are the same as those obtained in (1).