membranes. Extreme heat will be more damaging than extreme cold. The more concentrated the solvent‚ the more damage it will cause to the membranes‚ therefore the solvent of 50% Acetone‚ and the solvent of 50% Methanol will have higher readings of damage than the solvents of 25% Acetone‚ and 25% Methanol. Materials: (See attached lab) Procedure: (See attached lab) Observations: Temperature Lab | |Quantitative results |Qualitative results
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10. Add 3mL methanol and boiling stone. 11. Heat to boil and add dropwise methanol till it dissolves solid. 12. Cool in ice and filter‚ was with 30:7 ratio mix of methanol and water. 13. Determine percent recovery. Chemicals Used 1. Phthalic Acid 2. Benzoic Acid 3. Naphthalene Results | Melting Point (oC) | Weight (g) | % Recovery | Phthalic Acid | 175.5 | .35 | 67.5 | Benzoic Acid with H2O | 117.5 | .045 | 95 | Benzoic Acid with Methanol | 118 | .12 | 24
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the oil has left. Oil’s function is to lubricate‚ clean‚ and cool the engine. Additives are added to the oil to enhance those functions.Viscosity: Technically‚ viscosity is defined as resistance to flow. Commonly though‚ we think of it as an oil’s thickness. To be more specific‚ it is the thickness of an oil at a given temperature.The viscosity of an oil could be reported at any temperature‚ but to standardize things‚ most laboratories report either a low temp (100F or 40C) or a high temp (210F or 100C)
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1. Sodium and potassium are the most frequently ecountered alkali metals‚ though rarely as the metal. Why these elements are rarely found as the metal? (Refer to the relative measurements tabulated in the form of electronegativities‚ ionization energies‚ or reduction potentials). These are due to the fact that their outer most orbital (ns1 valence electron configuration) has tendency to lose electron very easily and make stable configuration. The single valence electron is relatively far from the
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the amount of blood moving through a body area or the entire cardiovascular system in a given amount of time. 2. Pheriphial resistance- the opposition to blood flow resulting from the friction developed as blood streams through blood vessels. 3. Viscosity- A measure of the “thickness” of the blood and is caused by the presence of proteins and formed elements in the plasma 4. Systole 5. Diastole 6. End diastolic volume 7. Stroke volume 8. Cardiac Output Activity 1 1. What happened to the
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water and methanol‚ the ratio of water to methanol must be determined for this to occur. Therefore‚ 1 mL of methanol will be added to the crude product in a test tube that is then taken to a boil in a water bath. Once boiling‚ water is added dropwise until the solution turns cloudy. The water must be added at the same temperature as methanol. Precipitate should form around the droplet of water added that then dissolves. Once the precipitate stops dissolving. At this point if methanol is added it
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calculate the molar mass)‚ and compare the results to the accepted value for the analysis of accuracy. This can be achieved by substituting the mass of the substance over the molar mass of the substance for “n”: m/M=n. The liquid heated to a gas is methanol‚ which has an accepted value for molar mass of 32.05g/mol. Materials: 500 ml Erlenmeyer flask 1000 ml beaker Hot plate Aluminum foil Needle Unknown liquid sample (CH3OH) Ring stand and beaker clamp Procedure: 1) Prepare 1000 ml
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Definition 1 1. CT Computerized Tomography‚ imaging modality 2. PPE Personal Protective Equipment. Gloves‚ gown‚ mask 3. Contrast media Diagnostic agents 4. Artifact Unwanted objects‚ error in an image 5. Viscosity Thickness‚ friction of fluid Definition 2 1. CT CT is an acronym for computerized tomography. It is a method of examining body organs by scanning them with X rays and using a computer to construct a series of cross-sectional images. 2. PPE Personal Protective Equipment
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CHNG 1103 INTRODUCTION OF MATERIAL AND ENERGY TRANSFORMATIONS COURSE NOTES PART A: MATERIAL BALANCE GENERAL INFORMATION LECTURERS Dr. Marjorie Valix (Part A: Material Balance) email: mvalix@usyd.edu.au office: Rm 444 Chemical Engineering Blg. Phone: 93514995 (Direct) or 9351 2455 (General Office/Messages) Dr. Vincent Gomes (Part B: Energy Balance) Email: vgomes@usyd.edu.ua Office: Rm 452 Chemical Engineering Blg. Phone: 9351 4868 TEXTBOOK R.M. Felder and R.W. Rousseau “ Elementary
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Heats of Combustion of Alkanols Aim: To perform a first-hand investigation to determine the heats of combustion of selected alkanols. Hypothesis: It was predicted that methanol would have the highest molar heat of combustion‚ decreasing as the chains become longer. Equipment: • Three spirit burners containing methanol‚ ethanol and propan-1-ol respectively • Electronic scales • Water • 100ml measuring cylinder • Retort stand and boss-head clamp • Copper beaker • Thermometer Method:
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