Experiment 11 Lab Assignment Answer Sheet: Chromatography of Food Dyes Name: Pre-Lab: Define the Rf value of a compound: It is the distance traveled by the compound divided by the distance traveled by the solvent front. Data and Observations: Record the distance travelled by the sample and the solvent in the table below and calculate the Rf values. Table 1. Color|Blue1|Blue2|Red3|Red40|Yellow5|Yellow6|Solvent| Distance(mm)|50mm|0mm|10mm|21mm|28mm|23mm|50mm| Rf|1|0|0.2|0.42|0.56|0.46|1| Table 2. Substance|Kool-Aid®: Grape|Kool-Aid®: Strawberry|Solvent| Distance (mm)| 19mm(red)|28mm(red)|48mm| Distance (mm)| 47mm(blue)||48mm| Rf|0.39 & 0.98|0.58|1| Table 3.
Be sure to report the correct number of significant figures and unit for each measurement. (Use the exponent for 0C) Be sure to record the mass to +/- 0.1 g and the temperature to +/- 0.1 oC. Table #1 Food Item Description Marshmallow Peanut / Walnut Other Sample-Identify 1 Mass of food & holder 1.2g 0.8g 0.8g 2 Mass holder 0.6g 0.5g 0.3g 3** Mass of food (subtract 2 from 1) (before burning) 0.6 g 0.3g 0.5g 4 Mass of food & holder – initial (same as 1) 1.2g 0.8g 0.8g 5 Mass of food & holder – after 0.6 g 0.7g 0.4g 6 Mass of food burnt (subtract 5 from 4) 0.6 g 0.1g 0.4g 7 Mass of beaker & water 110.1 110.1 110.1g 8 Mass of beaker 66.9g 66.9g 66.9g 9 Mass of
Now that everything is set up, one is ready to begin the process of making oreo balls. First, one’s hands should be washed thoroughly. Then take the whole package of oreo cookies and place them in a food processor. Mix the oreo cookies until they are just crumbs. Add the softened cream cheese to the food processor and make sure that the oreo cookies and cream cheese are mixed well together.
You can make special and delicious vegetable dumplings by fallowing these easy steps. First, you need to prepare ingredients and cookers for make dumplings. You need flour, vegetable, tofu, mushroom, scallion, leaven, salt, pepper, soy sauce, and water. You also need two mixing bowls, a bowl, a kitchen board, a pair of chopsticks, a knife, a cup, and a pot. The second step is to put four or five cups of flour, room-temperature water, and leaven into one of mixing bowls.
The pH level of vinegar varies from 2.40 - 3.40, when the pH level of lemon juice is 2.00-2.60.6 The pH level of baking powder is 9.7 pH paper reacts chemically with acids or bases. This chemical reaction changes the papers light absorption qualities which changes the color of the paper. According to the color you can find out how acidic or basic your substance is, using a pH scale8 (like one shown below). I will complete this experiment a couple of times, so that I can get the average amount of baking powder needed to neutralize both lemon juice and vinegar. Hypothesis: I think that it will take about 4 tsp of baking powder to fully neutralize the tablespoon of lemon juice.
DNA Extraction Aim: To extract DNA from a carrot using house hold products. Method: * Step 1 – Pour 60 ml (¼ cup) of clear alcohol into a glass. Place the glass into the bowl of iced water to chill, then set aside. * Step 2 – Pour 120 ml (½ cup) of tap/distilled water into the measuring cup with the salt. Add 30 ml (2 tablespoons) of clear detergent and mix carefully until the salt is dissolved.
Caloric Content of Food obseRvations & Calculated Values (Calculated values have the yellow background.) Data Table 1: Food Item - Observations | Food Item Description: | Marshmallow | Peanut / Walnut | Other Sample | Mass of food & holder – initial | 30.6 g | 28.8 g | 28 g | Mass of food & holder – final | 30.3 g | 27.5 g | 27.8 g | Mass of food burnt | 2.8 g | 0 g | 0.2 g | Mass of beaker | 56.7 g | 56.7 g | 56.7 g | Mass of beaker & water | 105.6 g | 105.6 g | 105.6 g | Mass of water | 48.9 g | 48.9 g | 48.9 g | Water temp. – initial | 25 °C | 25 °C | 25 °C | Water temp. – final | 26 °C | 50 °C | 27 °C | ΔT (oC change) | 1 °C | 25 °C | 2 °C | Heat Energy gained by water | 12.97 J | 5114.94 J | 17.51 J | Heat Energy per gram | 4.184 J/g | 3934.57 J/g | 35.02 J/g | QUestions Which of the foods tested contains the most energy per gram? I used a cashew instead of a peanut, so the cashew.
I believe the household items will be on the extremes, either extremely basic or extremely acidic. Methods Items for experiment were purchased from the Commissary and the Nhetto. They include: 1 x .608 kg head of red Cabbage 2 x Melitta white coffee filters 1 x 12 oz coke 1x Tums antacid 1x Tilex Mold and Mildew Remover 1x 22oz bottle of Clorax bleach 1x bx of Arm and Hammer Baking Soda 1x toilet bowl cleaner 1x hohes C orange juice 750ml of tap water The following steps from the guide was followed (with changes from the instructor): 1. Using a standard cheese grater, I took the entire head of red cabbage and shredded it into small pieces. After shredding was complete the pile of cabbage was placed into a stainless steel cook pot.
Red velvet Cake Ingredients Cake: • 2 cups sugar • 1/2 pound (2 sticks) butter, at room temperature • 2 eggs • 2 tablespoons cocoa powder • 2 ounces red food coloring • 2 1/2 cups cake flour • 1 teaspoon salt • 1 cup buttermilk • 1 teaspoon vanilla extract • 1/2 teaspoon baking soda • 1 tablespoon vinegar • Icing: • 1 (8-ounce) package cream cheese • 1 stick butter, softened • 1 cup melted marshmallows • 1 (1-pound) box confectioners' sugar • 1 cup shredded coconut • 1 cup chopped pecans Directions Preheat oven to 350 degrees F. In a mixing bowl, cream the sugar and butter, beat until light and fluffy. Add the eggs one at a time and mix well after each addition. Mix cocoa and food coloring together and then add to sugar mixture; mix well. Sift together flour and salt. Add flour mixture to the creamed mixture alternately with buttermilk.