Archive
7th of September 2015
Chemistry
Q:

bubbles r produced during opening a soda bottle and when baking soda is added to vinegar.what is the difference between these two cases?

Sacheta Saini - CBSE - Class IX

Monday, September 07, 2015 at 18:14:PM

A:

Hi Sacheta,

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.

Monday, September 07, 2015 at 18:25:PM