Question

Carbonated drinks contain carbonic acid. The carbonic acid is formed when excess CO2 gas is added to the drink and then the container is quickly capped to capture the excess gas. The CO2 gas reacts with the water to form carbonic acid. The equilibrium is easily disturbed by shaking the bottle. a. Observe an unopened carbonated drink container. Describe if the bottle can be squeezed or if it is hard. Are the bubbles present on the top of the liquid? What gas is expected to be on top of the liquid? b. Shake the bottle. Repeat the observations. The bubbles will eventually disappear. Measure the amount of time required for the bubbles to disappear. c. Repeat steps 1 and 2 using a bottle which contains only tap water. Answer the same questions.

Answer 1

A) Unopened carbonated drink bottle cannot be squeezed, it is hard.

No air bubbbles are present are present on the top of liquid.

CO2 ( carbon dioxide) gas is present on the top of liquid.

B) After shaking the bottle bubbles are seen on the top of the liquid. The bubbles disappeared in around 15 seconds.

C) Tap water bottle can be squeezed, it is not hard

some air bubbles are present on the top of the liquid

After shaing the bottle it took approximately 2 minutes to disappear bubbles form the bottle.( still all bubbles were not removed)