We use cookies to give you the best experience possible. By continuing we’ll assume you’re on board with our cookie policy

Solubility of Co2 in Water

essay
The whole doc is available only for registered users
  • Pages: 3
  • Word count: 590
  • Category: Water

A limited time offer! Get a custom sample essay written according to your requirements urgent 3h delivery guaranteed

Order Now

Aim: To decarbonate a bottle of soft drink and find out the amount of CO2 in the drink. * Principle: The reaction between carbon dioxide and water is an example of an equilibrium reaction:

Materials:
*
* 3 soft drink bottles (300ml)
* 6g of salt (NaCl)
* Triple beam balance scale
* Thermometer
* Digital scale
* Watch glass
* Electric hotplate

Method:
Standing up method
1. An unopened bottle of carbonated drink was weighted.
2. The cap was removed slowly with care, controlling the release of bubbles so that the soda water does not form out the top and lose soda water. 3. The opened bottle was left for 1 hour and reweighted. Warming method (uses the reduced water solubility of gas with temperature rise) 1. The open bottle stood carefully on an electric hotplate, and stirred using the thermometer to release the gas bubbles. 2. The soda bottle was heated to about 37oC.

3. The bottle and its cap were reweighted.
4. The change in weight was calculated due to loss of CO2 gas to the air. Salting method (uses the addition of ions which attract water molecules and reduce the availability of water able to dissolve gas) 1. 6g of salt was weighted.

2. The salt was added very slowly and carefully to the soda water so that the water does not degas too quickly. 3. The bottle and its cap were reweighted.
4. The change in weight was calculated due to loss of CO2 gas to the air, allowing the salt added to the soda water.

Results:
Method type | Weight before | Weight after | Change in weight (amount of CO2 loss) | Standing up| 338g| 337.5g| 0.5g|
Warming | 353.5g| 352.2g| 1.3g|
Salting | 338.2g| 342.6g| 1.5g|

* Calculate the loss of CO2 in (a) gram, (b) moles. (molar volume of a gas at 25oC and 101.3KPa pressure is 24.5L)

Discussion
1. Compare the volume of gas released with the volume of liquid soda water which contained that amount of gas.

2. What do these volumes illustrate about the distance between CO2 particles in gas phase compared with the distance between CO2 particles in solution? In a liquid, particles have more energy, are less tightly packed than solid, and can move freely. Liquids have definite volume but no definite shape. The particles in a gas have the most energy and are free to move around and so they spread out rapidly.

3. Explain why bubbles of CO2 gas escape from solution in a bottle when cap is undone. Carbonated soft drinks contain CO2 gas dissolved in water and as these bottles are sealed the pressure of the sealed bottle prevents the gas from escaping the liquid, and when you open the bottle pressure released with force out of CO2 gas.

4. Explain why the bottles of carbonated drink could burst if they are placed in a freezer. The density of water is larger in the liquid state than in solid form. The soft drink is basically water so when it freezes it expands and the molecules inside are still moving and this increases the pressure and causes it to burst out. 5. What happens to a carbonated drink if its container is opened and it is left to stand for hours before it is drunk? There will be lack of taste, because the equilibrium will shift to left side causing less acidic level.

Conclusion: In conclusion, we were successfully able to decarbonate a bottle of soft drink and find out the amount of CO2 in the drink.

Related Topics

We can write a custom essay

According to Your Specific Requirements

Order an essay
icon
300+
Materials Daily
icon
100,000+ Subjects
2000+ Topics
icon
Free Plagiarism
Checker
icon
All Materials
are Cataloged Well

Sorry, but copying text is forbidden on this website. If you need this or any other sample, we can send it to you via email.

By clicking "SEND", you agree to our terms of service and privacy policy. We'll occasionally send you account related and promo emails.
Sorry, but only registered users have full access

How about getting this access
immediately?

Your Answer Is Very Helpful For Us
Thank You A Lot!

logo

Emma Taylor

online

Hi there!
Would you like to get such a paper?
How about getting a customized one?

Can't find What you were Looking for?

Get access to our huge, continuously updated knowledge base

The next update will be in:
14 : 59 : 59