Within each testube add 5cm3 of ethanoic acid 3. Add a few drops of U.I solution to the first test tube and record observations 4. Add a strip of magnesium to the 2nd test tube and record observations 5. Add half a spatula of sodium hydrogen carbonate to the 3rd test tube and record observations 6. Add a quarter spatula of copper (II) oxide and warm the solution gently to the 4th test tube and record observations.
White precipitate shows the presence of chloride (Cl-). Chloride anion equation: HCl(aq) + AgNO3 (aq) → HNO3 (aq) + AgCl(s). The nitrate anion test involves cooling a mixture containing 1 mL of test solution and 3mL 18M H2SO4. 2mL is poured down the inner test tube side and the presence of a brown ring shows nitrate (NO3-) to be present. The carbonate anion test mixes 1 mL of test solution and drops of 6M HCl.
A voltmeter was used to measure the electrical resistance of different solutions. * Experiment and Observation: The plastic and glassware used in this experiment was thoroughly washed with hot water and rinsed with distilled water. * * Part I: Preparation of Standard Phosphate Solutions 1. 1.0 ppm standard: 1.00 mL of 10.0 ppm phosphate solution was placed in a 25 mL graduated cylinder and diluted to exactly the 10 mL mark with distilled water then poured into a plastic cup labeled 1. Cylinder was rinsed with distilled water.
Holding the pipet vertically, add 20 drops of water to the cylinder. Record the new volume of water in the graduated cylinder in the first data table under Trail 1. 4. Without emptying the graduated cylinder, add an additional 20 drops from the pipet. Record the new volume for Trial 2.
What amounts of stock solution and water do you need to use? (Remember that you will need enough solution to more than cover the egg.) p. Write up your new dilution procedure in your lab notebook, including the calculated salt concentrations for each cup. q. Make the new dilution series.
We repeated thus experiment twice with each fuel, using clean water each time. Results Temp Of Water Alcohol Mass of alcohol Energy In Energy Out Before After Before burn After burn 26 46 Methanol 173.88 163.02 246386 408 25 45 Ethanol 163.98 162.80 35651 408 25 45 Propanol 157.73 156.82 30651 408 25 45 Brutanol 168.52 167.82 25,313 408 Calculations for energy in Calculations for energy out (Mass x enthalpy for substance) (Mass of water x enthalpy for substance x Mole temperature) 10.86 x 726, 000= 246,386.25 100 x 4.18 x 20= 408 32 1.18 x 1367, 000= 35,066.5217 46 0.91 x 2021, 000= 30,651.8333 60 0.7 x 2676, 000= 25,313.5135 74 Efficiency calculations Methanol = 408 x 100 = 0.16% Propanol= 408 x 100= 1.33% 246,386 30651 Ethanol= 408 x 100= 1.16% Bruntanol= 408 x 100= 1.61% 35066 25313 Accuracy As we can see all
4. Submerge the bag in the beaker and leave overnight. 5. Dry off the bag and then record its mass. After this write down the color of the bag and the beaker solutions and then test the bag and beaker solutions for the presence of glucose.
5mL of acidified water will be measured, using a graduated cylinder, and will be transferred to the R tube, and will be immediately vigrously mixed with the reactants. Once the solution turns to an orange or red-brown color, a pipet will be used to quickly remove 30 drops of the solution, then transferred to the C tube, and the mixing will resume until the solution is close to room temperature. The solution will be filtered into the P tube, and the solution that is left in the R tube should be washed three times with 1mL of acidified water each time. The water should then be poured into the P tube, leaving the solid in the R tube. Using a test tube holder, heat the R tube over the Bunsen burner, moving the tube in a circular motion until all the water has evaporated.
Objective The purpose of this experiment was to become familiar with the ability to reproduce an experiment several times. Experimental Materials 1 x Magnetic Stirring Bar (yellow) 2 x 100 mL Flask 8 x 50 mL Erlenmeyer flask Magnetic Hotplate Glass Stirring rod Distilled water Pipet (with Pump handle) Starch 0.20M Ammonium Persulfate (NH4)2S2O8 0.20M Ammonium Sulfate (NH4)2S2O4 0.20M Potassium Nitrate (KNO3) 0.20M Potassium Iodide (KI) 1.2 x 10-2M Sodium Thiosulfate (Na2S2O3) Experimental Method 1. All materials were obtained from the classroom. 2. The flasks were thoroughly cleaned with distilled water.
Crab Boil Recipe Let the water boil in a pot that is 3/4 full with two seasoning packets and 2-4 cut up lemons. Add 2 bottles of Newman’s Own Light Lime Vinagrette and Boil-in-bag Cajun seasoning. Put in onions, eggs(if desired) and garlic. Let ingredients come to a rolling boil and then add the sausage. After 10 min, add the potatoes.