Sucrose is used to sweeten foods, and provide short term energy. In sodas such as the orange soda and clear soda used during this lab, the sugar is used to sweeten the drink. Density can be used in order to find the sugar concentration in a particular solution. Density is known as the amount of mass that will fit into a certain volume. For this lab, the density of water will be 1 gram/cubic centimeter.
* The purpose of this lab is to answer the research question: “Does the concentration of sucrose affect the rate of cellular respiration in yeast?” What do you think? * I believe that the concentration of sugar will affect the rate of cellular respiration. The more sugar the faster the rate of cellular respiration. Data Tables | Depth of CO2 bubbles in: | Depth of CO2 bubbles in: | Sucrose Concentration | 10 minutes | 20 minutes | 0% | | | 1% | | | 5% | | | 10% | | | | Balloon description (size and circumference) | Balloon description (size and circumference) | Sucrose Concentration | 10 minutes | 20 minutes | 0% | | | 1% | | | 5% | | | 10% | | | Post-Lab Questions 1. What hypothesis did you use to answer the research question?
Obtain an Erlenmeyer flask that has a vacuum opening and attach the vacuum tube to it 8. Insert funnel and rinse the funnel with distilled water 9. Turn vacuum on and pour the pink solution into the Erlenmeyer flask, the precipitate should stay on top of the filter 10. Rinse the beaker out until all residue is gone 11. Try to rinse the precipitate in the funnel until the pink color is gone 12.
a. Drying tube- clear, plastic tube filled with drying agent 5. After distillation, record the mass of the distillate and
Then the same was done with each of the other substances. Weezie was washed off with water after the baking soda. Next, the tray was washed and dried. Then, using the spatula again a small amount of orange juice, molasses, veggie oil, and vinegar was placed in each corner of the dissecting tray. Weezie was placed near each substance again to be observed.
Purpose/ objectives: 1. To learn if food concentrations affect yeast activity 2. To improve skills in writing a lab report better 3. To practice measuring skills 4. To understand how yeast works Materials: * * 6 identical large test tubes (18 X 150mm) * 1 graduated cylinder (24ml) * Molasses stock solution ( 1:4- molasses: water) Dropper * Yeast suspension (1 gram of dry yeast in 100 mls water) * Aluminum foil * 1 test tube rack * 1 graduated cylinder (small) * 1 beaker * 6 small test tube (10 X 75mm) * Rule marked in millimeters Hypothesis: If you add more molasses to the yeast then the gas would became greater because the yeast cells reproduce so the waste became greater and
An aspirator was set up in order to filter the mixture. The vacuum source was turned on and the filter paper was wet with distilled water. After completely reacted, the KOH and aluminum product was poured through the filter. The beaker was rinsed with 5mL of water and poured through the filter again. This process was repeated once more and the resulting filtrate was poured into a clean 250mL beaker.
Stop two inches from the brim to allow for stirring the water and adding ingredients without overflowing. With one hand, grab the top of the Kool-Aid package and give it a gentle shake to move all of the powder to the bottom. Keeping your hand on the top of the package and grabbing the rest of the package with your other hand, slowly pull with the hand on top to tear about a centimeter off the package. Pour the contents of the package in the pitcher of water. Using the measuring cup, add two cup of confectioner’s sugar into the pitcher as well.
17. Repeat Steps 12 through 16 above for well #2 and well #3 and record your data under the Trial 1 column in the Data Table 1. 18. Wash the well plate immediately with liquid soap and dry the well plate thoroughly with paper towel and cotton swabs to remove any precipitate from the bottom of
The fermentation process occurs when the yeast feeds on the sugar in the wort turning it into alcohol and carbon dioxide. The fermentation process takes about ten days. Once ten days have lapsed, the liquid can finally be called beer. There are two different types of fermentation that can take place. The first is top fermentation, which Rob and his crew use to make Ipswich Ale.