If, however, I was assisting with the repositioning of a patient who is incontinent, I would probably consider hand washing, gloves and an apron. Once I have performed the activity, I would remove aprons and gloves, and dispose of them according to my organisation’s policy. I must wash my hands after patient contact and before moving on to the next person. If I make physical contact with a patient I was my hands, but if no physical contact is made I use an antibacterial gel which is provided by the NHS. Hand gels should only be used as an interim measure until you are able to perform a proper hand wash; they are not a suitable replacement for good hand washing.
Once produced, the Grignard reagent was then used to synthesise triphenylmethanol by reacting it with benzophenone. Reaction Scheme: Theory Reaction Mechanism The halide can be Iodide, chloride, or bromide, but fluoride is too unreactive form Magnesium to be used.
Data Tables: Step 1: Separating out the Iron Mass of weighing dish _0.7_g Mass of weighing dish and total mixture __5.4__g Net mass of the original mixture _4.7___g Mass 10-cm square paper __0.8__g Mass 10-cm square paper and iron filings _2.0___g Net mass of the iron filings _1.2___ g Step 2: Separating out the Sand Mass of weighing dish _0.7__g Mass of weighing dish and dry sand _1.7___g Net mass of the dry sand _1.0___g Step 3: Separating out the Benzoic acid Mass of cup __2.3__g Mass of filter paper _0.9___g Mass of filter paper and dry benzoic acid _1.6___g Net mass of the dry benzoic acid _0.7___g Step 4: Separating out the Salt Mass of cup and dry sodium chloride _3.3___g Net mass of the dry sodium chloride _1.0___g Substance Grams Percent of mixture Iron filings 1.2 30% Sand 1.0 25% Table Salt 1.0 25% Benzoic Acid 0.7 18% Conclusion: The purpose of this experiment was to teach me how to separate mixtures into their component substances. I learned to separation techniques based on the chemical properties of a substance. I separated sodium chloride, benzoic acid, silicon dioxide, and iron. I accomplished this by using the unique properties of each material and their differences in water solubility. Possible experimental errors include not properly removing all the iron/salt/benzoic acid from sand.
Lexington Overstreet 9/14/2012 Title: Determination of Density of an Unknown Liquid Unknown sample number P121736-LF12 First Combination of Equipment Employed 10 mL graduated cylinder, one decimal place balance. Summary of Experimental Procedure A ten milliliter graduated cylinder was filled with the liquid so that the meniscus was exactly at the 10.0mL calibration mark. The liquid sample was then carefully poured into a clean, dry weighing vial which had been pre-weighed with its cap. The vial was capped, reweighed, and the density of the liquid computed using the formula: Density (g/mL) = Sample Weight (g)Sample Volume (mL) This procedure was repeated three times. Experimental Data Trial 1 Trial 2 Trial 3 Sample Volume 10 mL 10 mL 10 mL Weight sample + capped vial 26.5g 26.5g 26.3g Weight vial + cap 15.5g 15.4g 15.4g Sample weight 11.0g 11.1g 10.9g Calculated Results Trial 1 Trial 2 Trial 3 Density of samples: 1.10g/mL 1.11g/mL 1.09g/mL Average density: 1.10g/mL 1.10g/mL 1.10g/mL Deviation from Average: ±0.00g/mL ±0.01g/mL -0.01g/mL Average Deviation: add absolute values of deviations from average and divide by the number of trials.
(Subtract the mass of the empty graduated cylinder from the mass of the graduated cylinder with liquid.) * Trial 1 26g – 36g=10g * Trial 2 25g – 35.9g = 10.9g * Trial 3 25.2g – 36.1g = 10.9g 2. Calculate the density of the unknown liquid for each
Part I: Density of Unknown Liquid | | Trial 1 | Trial 2 | Trial 3 | Mass of Empty 10 mL graduated cylinder (grams) | 2.56g | 2.55g | 2.60g | Volume of liquid (milliliters) | 8.50mL | 8.80mL | 8.90mL | Mass of graduated cylinder and liquid (grams) | 36.10g/mL | 36.60g/mL | 36.90g/mL | Part II: Density of Irregular-Shaped Solid | Mass of solid (grams) | 41.000g | 38.890g | 42.960g | Volume of water (milliliters) | 50mL | 55.5mL | 53.1mL | Volume of water and solid (milliliters) | 54.9g/mL | 60g/mL | 58.1g/mL | Part III: Density of Regular-Shaped Solid | Mass of solid (grams) | 28.00g | 27.70g | 28.10g | Length of solid (centimeters) | 5.20cm | 5.00cm | 4.50cm | Width of solid (centimeters) | 3.00cm | 4.00cm | 3.50cm | Height of solid (centimeters) | 2.50cm | 3.00cm | 2.00cm | Calculations Show all of your work for each of the following calculations and be careful to follow significant figure rules in each calculation. Part I: Density of Unknown Liquid 1. Calculate the mass of the liquid for each trial. (Subtract the mass of the empty graduated cylinder from the mass of the graduated cylinder with liquid.) * Trial 1 36.10-2.56= 33.54g * Trial 2 36.60-2.55= 34.05g * Trial
Part I: Density of Unknown Liquid | | Trial 1 | Trial 2 | Trial 3 | Mass of Empty 10 mL graduated cylinder (grams) | 25.5g | 25g | 25g | Volume of liquid (milliliters) | 8.6mL | 8.7mL | 8.4mL | Mass of graduated cylinder and liquid (grams) | 36g | 36g | 35.5g | Part II: Density of Irregular-Shaped Solid | Mass of solid (grams) | 38.74g | 39.002g | 42.489g | Volume of water (milliliters) | 50mL | 49mL | 51mL | Volume of water and solid (milliliters) | 54mL | 53mL | 56mL | Part III: Density of Regular-Shaped Solid | Mass of solid (grams) | 26g | 27g | 26g | Length of solid (centimeters) | 5.2cm | 5cm | 4.5cm | Width of solid (centimeters) | 3cm | 4cm | 3.5cm | Height of solid (centimeters) | 2.5cm | 3cm | 2cm | Calculations Show all of your work for each of the following calculations and be careful to follow significant figure rules in each calculation. Part I: Density of Unknown Liquid 1. Calculate the mass of the liquid for each trial. (Subtract the mass of the empty graduated cylinder from the mass of the graduated cylinder with liquid.) * Trial 1 36-25.5=10g * Trial 2 36-25=11g * Trial 3 35.5-25=10g 2.
5) Information about Clearwater Company's direct materials cost follows: Standard price per materials ounce $ 100 Actual quantity used 8,700 grams Standard quantity allowed for production 9,100 grams Price variance $ 76,125 F ________________________________________ Required: What was the actual purchase price per gram? (Round your answer to 2 decimal places. Omit the "$" sign in your response.) Actual purchase price $ (0%) P16-43 Direct Materials (L.O. 5) Information about Clearwater Company's direct materials cost follows: Standard price per materials ounce $ 100 Actual quantity used 8,700 grams Standard quantity allowed for production 9,100 grams Price variance $ 76,125 F ________________________________________ Required: What was the actual purchase price per gram?
Mine Pre-lab questions 1. When you mix water and salt, you get a saltwater solution; where you can’t see the salt (chemical change). Therefore, making it soluble. Insoluble would be the antonym of soluble. 2.
7. What purpose is served when a test is done using water instead of a sample substance? Water is the control sample. The purpose is to know if the factors being tested is making difference in the experiment. Without a control sample, ne cannot know if the results would have been the same without factors from the experiment.