Calculate the concentration of grams of sodium stearate per milliliter of diluted solution. To do this, multiply the concentration of sodium stearate in the dishwashing liquid by the dilution of the solution (1.50 mL dishwashing liquid per 100 mL solution). Answer = 1.5 *10^-4 g/mL 4. Calculate the number of moles of sodium stearate in a single layer. To do this, first take the number of drops used to achieve the monolayer (1 drop) and convert it to mL using the calibrated number of drops per mL.
Morgan Stanley Experiment 7: Calorie Content of Food Report submitted:3/9/2013 Title: Calorie Content of Food Purpose: To measure the energy content of various food items and to become familiar with energy units like calories and joules. Procedure: measure the energy content of a variety of foods by burning a portion of food and capturing the heat released to a known mass of water in a calorimeter and identify units of measuring heat such as calories and joules. Data: | Marshmallow | Peanut | Popcorn | Food Item Description | Small & White | Small & Salted | Extra Butter | Mass of food & holder – initial | 15.2 | 17.3 | 14.9 | Mass of food & holder – final | 13.7 | 12.5 | 11.4 | Mass of food burnt | .70g | .5g | 0g | Mass of beaker | 4.2 | 4.2 | 4.2 | Mass of beaker & water | 54.2 | 54.2 | 54.2 | Mass of water | 39.9 | 42.6 | 44.83 | Water temp. – initial | 48 | 45 | 47 | Water temp. – final | 36 | 33 | 46 | Delta T (oC change | 12C | 12C | 1 C | Questions: A.
With your spoon move the rice in a circular motion. Keep stirring until rice is a golden color. When the rice is golden, carefully remove the pot from the stove and set aside. Get your blender; add about four whole tomatoes from the can, ¼ of an onion, and 1 cup of water. Cover the blender with a lid and blend for 1 minute.
Kyla Emerine Date of Experiment: April 15, 2015 Report Submitted: August 17, 2015 Title: Colligative Properties and Osmotic Pressure Purpose: To observing changes of colligative properties in freezing and boring points, by adding salt to a solution. Procedure: In this experiment I performed various procedures such as adding different amounts of salt to tap water that was freezing or boiling and observed how it changed the temperatures. Data Tables: Data Table 1. Dialysis Tubing Results Time: |Mass of Dialysis Tubing and Contents | 0 minutes |6.5g| 30 minutes |6.8| 60 minutes |7.2| Questions A. In your experiment, is the light corn syrup in the dialysis tubing hypertonic or hypotonic to the water?
Chlorine gas can be produced in the laboratory by adding concentrated hydrochloric acid to manganese(IV) oxide in the following reaction: MnO2(s) + 4HCl(aq) ( MnCl2(aq) + 2H2O(l) + Cl2(g) a. Calculate the mass of MnO2 needed to produce 25.0 g Of Cl2 ans: 30.7 g MnO2 b. What mass of MnCl2 is produced when 0.091 g of C12 is generated? ans: 0.16 g MnCl2 1. How many moles of ammonium sulfate can be made from the reaction of 30.0 mol of NH3 with H2SO4 according to the following equation: ans.
NaOH Hot Plate 10 ml graduated cylinder • 1M. HCl Ice distilled water • 3% H2O2 2 large beakers potato • 6 test tubes Forceps liver • Test tube rack 3 micropipettes mortar and pestle • 3 thermometer knife Stop watch • Test tube holder Stirring rod Part A – Normal Catalase Reaction Hypothesis: Crushed potato will have the highest rate of reaction Procedure: 1- Take two clean test tubes and mark them 1 and 2. 2- Place a piece of potato in tube 1. 3- Pour 2ml of hydrogen peroxide to tube 2, and determine temperature. 4- Pour content of tube 2 to tube 1, and observe.
No matter the variety, original, crinkle, or baked, they are all manufactured with oil. This test will show how much oil each of these types of chips hold. I will be preforming a test with three varieties of 7-11 Select brand chips; Original Potato Chips, BIG BITE Hot Dog Potato Chips, and Kettle Style Salt and Vinegar Potato Chips. I will weigh out 0.5oz of potato chips, crush them on graph paper, and let them set for 1 minute. I will then remove the chips, observe the oil residue left behind, and record the data.
A) How many mosm solute will 1 gram of NaCl yield? Show your calculations. (1gNaCl/1)*(1000mg/1gNaCl)(2/58mg)=34.5mOsm. 3. Mixed Solutions: If 1 mmole of glucose (180mg=1mOsm) and 1 mmole of NaCl (58mg=2mmOsm) are put into a beaker and distilled water added to make 1 liter, the osmolarity is 3 mOSm/L.
Materials: 1) Beakers 2) Water 3) Plastic wrap 4) Rubber band 5) Light corn syrup 6) Vinegar 7) 2 raw egg (large) 8) 2 graduated cylinder (100ml, 50ml) 9) Marker for labeling cup 10) Tri Beam scale Procedure: 1) Measure 130ml of vinegar into the beaker. 2) Gently place the egg into the vinegar. Make sure the egg is completely covered by the vinegar. 3) Weigh all of the items o the scale 4) Cover the beaker with plastic and secure it with a rubber band. 5) Label the beaker with your name and period.