Before the experiment: white vinegar and eggs
During the experiment: the egg surface dissolves and bubbles are formed.
After the test: the eggshell is completely dissolved,
The chemical equation is
2ch 3 cooh+CaCO3 = =(ch 3c ooh)2Ca+CO2+H2O
Or a simplified version.
2 HAC+CaCO3 = = Ca(Ac)2+CO2+H2O
The main component of white vinegar is acetic acid.
I soak the eggs in white vinegar and shake them every day to see what changes have taken place. I didn't remember it carefully. Now let me recall it for you. I hope it will help you a little!
On the first day, the egg was put in white vinegar and looked out of the glass bottle. Nothing has changed except the small bubbles all over. I touched it with my hand, but it didn't soften.
On the second and third days, there were still many small bubbles. When shaking the bottle, I found a small strip of liquid falling off the eggshell around it. (Never touched)
On the fourth day, small bubbles still exist, not as many as on the first day. Maybe I sent them away, but the eggs showed signs of getting bigger (self-feeling), and they were whiter when they were put in the bowl before.
On the fifth and sixth day, the bubbles decreased, the unknown liquid in the eggshell increased, the white vinegar was a little cloudy, and the eggshell became thinner and softer.
On the seventh day, the egg is almost translucent, the shell becomes very soft, and there is no hard shell on the surface! It's amazing!
I just took it out after soaking it for a week. Because my friend recommended soaking eggs in vinegar as a mask, I tried it out of curiosity. I hope it will help you!
If you are a small partner, if you had carefully observed it, even if you lost it, you should be able to remember what the starting point is now. You can combine my observation and recall how your paper was written!
Source: www.qikan120.com.