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Add 2 tbsp. of baking soda to bottle #4. How do you think being in a basic environment will affect yeast fermentation?

After removing each balloon from its bottle, carefully tie a knot at the bottom of each balloon (where the string is) so that you can be sure no air will escape the balloons while you collect your data. Repeat steps 3–17 two more times so that you have done a total of three trials. Each time be sure to record your results in your data table for the correct trial number.Repeat steps 16.a. to 16.e. until you have done the water displacement test for each of the five balloons. In the data table in your lab notebook, record how much water was displaced (how much water is in the beaker) by the balloon, in milliliters. This should be recorded in the column for Trial 1. Then empty the measuring cup. On the x-axis (horizontal axis), put the name of the condition tested, such as "Water only," "Sugar and baking soda," etc. Make a bar for each condition tested.

In this experiment, you added the same amount of sugar to each bottle because it is what the yeast uses to make CO 2 gas during fermentation. If you add more sugar, will you always get more CO 2 gas? How much more sugar can you add? Is there a limit? Calculate the average water displaced for each condition over the three trials. Record the results in your data table. Wikipedia contributors. (February 22, 2014). Yeast. Wikipedia, The Free Encyclopedia. Retrieved February 27, 2014. Exploratorium Staff. (n.d.). The Science of Bread: Yeast-Air Balloons Activity. The Exploratorium. Retrieved February 27, 2014.

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Now you are ready to measure the amount of CO 2 gas inside each balloon with a water displacement test. To do this, do the following: If the pan becomes full of water before the balloon is completely submerged, go on to step 16.d. and then repeat steps 16.b. to 16.d. until you can completely submerge the balloon.

Add 2 tbsp. of salt to bottle #3. How do you think increasing the environment's salinity will affect yeast fermentation? Sugar and vinegar: The vinegar in this condition will decrease the environment's pH, making it more acidic. Figure 3. Fill the large pot completely full of water and place it inside of the pan, as shown here.

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Imagine a 32 Oz Stainless Steel insulated water bottle with a convenient twist. It comes with two bowls that effortlessly attach at the bottom, providing you and your four-legged friend with both food and water on-the-go. No more hassle of carrying multiple containers or compromising on comfort while exploring the great outdoors. How do you think increasing the salinity will affect the ability of yeasts to carry out fermentation? What about making the environment more basic or more acidic? To measure how well the yeasts carry out fermentation, you will use balloons to trap the CO 2 gas released by the yeasts during fermentation. To measure how much CO 2 is in each balloon you will then submerge each under water and use water displacement to measure how much space each balloon takes up. Which condition(s) will cause the formation of the most CO 2 gas and the most active fermentation? Terms and Concepts Sugar and baking soda: The baking soda in this condition will increase the environment's pH, making it more basic. Overall, how do you think the different environments affect how well the yeast can produce CO 2 during fermentation?