Question

Carbon dioxide has a density of 0.002 g/ml. Soda has a density closer to 1.0 g/ml. Carbonated sodas have carbon dioxide gas dissolved in the soda. If a carbonated soda is left open at room temperature over the course of 24 hours, what would you predict to happen to the carbon dioxide?
Responses

A The carbon dioxide will float up and leave the soda because it has a lower density than water. The carbon dioxide will float up and leave the soda because it has a lower density than water.

B The carbon dioxide will sink to the bottom of the soda because it has a higher density than water.The carbon dioxide will sink to the bottom of the soda because it has a higher density than water.

C The carbon dioxide will float up and leave the soda because it has a higher density than water. The carbon dioxide will float up and leave the soda because it has a higher density than water.

D The carbon dioxide will sink to the bottom of the soda because it has a lower density than water.

Answer 1

A

CO2 dissolved in the soda will come out as gas bubbles. Gas bubbles are much less dense than the liquid, so they rise to the surface and escape (over time the soda goes "flat" as dissolved CO2 leaves).