Is soda pop a mechanical mixture or a solution?

Question

plz explain why

Answer 1

This is really a trick question. The contents inside a closed (pressurized) can or bottle contains two phases. The lower phase is a liquid solution and the upper phase is pressurized gas containing a high percentage of carbon dioxide (this is a gas solution).

When the container is opened, the pressurized gas excapes into the atmosphere and upon doing so allows a change to take place in the solution below. The chemical change is:

H2CO3 (aq) --> H2O (l) + CO2 (g)

The gas bubbles of carbon dioxide form inside the liquid solution, turning it into a mixture (I doubt that the term mechanical has much meaning here).

Answer 2

Its a solution. Because there is only one phase.