CBSE - IX - Chemistry
bubbles r produced during opening a soda bottle and when baking soda is added to vinegar.what is the difference between these two cases?
A gas gushes out in the form of bubbles while opening a soda bottle. This gas is nothing but the carbon dioxide gas.
Baking soda and vinegar react with each other because of an acid-base reaction. Baking soda is a bicarbonate (NaHCO3) and vinegar is an acetic acid (HCH3COO). One of the products this reaction creates is carbon dioxide gas.
The first example is a physical change. Whereas, the second example is a chemical change. In both the cases carbon dioxide gas is liberated.
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