Carbonic acid (H2CO3) is unstable and easily decomposed into water and carbon dioxide, that is, H2CO3=H2O+CO2, H2O is water and CO2 is carbon dioxide. Coke bubbles because it produces carbon dioxide, so it can blow balloons.
When the balloon gets bigger, the air in the bottle is compressed, and the air pressure increases, so the balloon will shrink, so it can't be blown up. After the air in the bottle is compressed and discharged from the small hole, the balloon can be inflated. Because the balloon becomes smaller, the air volume in the bottle increases and the pressure becomes smaller, which is less than the external atmospheric pressure. The balloon is supported by external atmospheric pressure and will not become smaller.
chemical property
Simple structure: ho-CO-oh in co? Formed when dissolved in water.
Pure carbonic acid exists in the form of C(OH)4, which is an unstable crystal and decomposes violently when it meets water.
It should be noted that the above values are not suitable for actually estimating the acidity of carbonic acid because the acidity of a single carbonic acid molecule is stronger than that of acetic acid and formic acid. In fact, carbonic acid molecules only appear in the dynamic equilibrium of carbon dioxide and water, and its concentration is much lower than that of carbon dioxide, so the acidity is actually lower.