...Detailed Job Description Job title: (insert job title) Reporting to: (insert supervisor’s title) Salary: (insert salary per hour, per annum or total package including base salary, superannuation, commissions or benefits) Hours: (insert average number of hours per week or type of employment such as casual, full-time) Location: (insert the location of the position and any travel required) Purpose of the position (Insert a short paragraph which describes the overall purpose of this position and how it contributes to the goals or function of the business. Include the authority level, for example, “manager” or “support staff”) Responsibilities & duties Responsibility 1 – (insert responsibility or duty of the position including frequency or duration of work, effort and skill required, complexity of tasks and equipment required) Work standard: (insert what aspect of the responsibility will be reviewed to determine if the job is being done correctly, for example, time frame, or number of completed tasks per week) Responsibility 2 – for example, “to manage the daily operations of the office including organising mail, couriers, catering and travel. Staff need to be able to use MS EXCEL confidently, to arrange global travel and to work on their own.” Work standard – for example, “at the end of each working week, all catering events for the following week must be finalised.” Responsibility 3 – (insert additional items as needed) Work standard – (insert additional items as...
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...Level of Development and Level of Detail came into play with the advancement of computers and BIM technology. As the AEC industry began move towards using computer renditions for design and analysis, it became necessary to define the certainty with which drawings could be trusted. The detailing of elements changes throughout the duration of a project, so it is important for the team to be able to recognize what level of detail is provided and how trustworthy it is. For this reason, different levels of development were created to allow for a standardized system of analyzing drawings and details. Level of Development vs. Level of Detail The level of Development (LOD) enables construction teams to specify and distinguish the content and reliability of Building Information Models at various stages of the design and construction process with high levels of clarity and reliability. The LOD describes the minimum dimensional, spatial, quantitative, and qualitative data included in a Model Element to support the authorized uses associated with such LOD. Since each Model Element develops at a different rate, the Level of Development (LOD) framework allows the project team to understand the progression of a Model Element from conceptual idea to precise final definition and description. The LOD of a given Model Element informs other Project Participants how developed the information is expected to be. This allows participants to extent to decipher which that information can be relied...
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...VOCABULABY New words | Part of speech | Definition | Making sentences | Intervention | n | The act of becoming involved in an argument, fight, or other difficult situation in order to change what happens | The intervention of Union helps to prevent the conflict between Pakistan and Iran | Dubious | adj | Feeling doubt or not feeling certain | I'm dubious about his promises to change his ways. | Inextricably | adv | If two or more things are inextricably linked etc, they are very closely related and affect each other | His name was inextricably linked with the environmental movement. | Assiduous | adj | Showing hard work, care and attention to detail | The Government has been assiduous in the fight against inflation. | Augment | v | To increase the size or value of something by adding something to it | He would have to find work to augment his income. | Inferior | adj | Not good, or not as good as someone or something else | These products are inferior to those we bought last year. | Relegate | v | To put something into a lower or less important rank or position | She resigned when she was relegated to a desk job. | Debilitate | v | To make someone or something physically weak | Progress has been debilitated by a refusal to share ideas. | Prescribe | v | To say what medical treatment someone should have | The drug is often prescribed for ulcers. | Taint | v | To spoil something, especially food or blood, by adding a harmful substance, or...
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...Student Name: Andreas Sippl Student ID: 4445491 Date: 04 January 4, 2015 Course and Section Number: SCIN131 Lesson 6 Lab: Titrations and Natural Acid/Base Indicators Begin by viewing the following Thinkwell videos 15.1.7 CIA Demonstration: Titrations 11.2.2 CIA Demonstration: Natural Acid-Base Indicators (NOTE: The second video is sort of a supplement to the first, and shows how this applies to your daily life. Feel free to try some of the things listed in the video, but be sure to report back to the class regarding the results of your experiments!) After you watch the above video, answer the questions below in sufficient detail: (a) (1 pts.) In YOUR OWN WORDS, what is a titration? What type of reaction is it? Be detailed and specific...
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...The chemistry of perming & rebonding Some of us have naturally curly hair but want it straightened; others have it naturally straight but want it curly. But whatever the style you like to wear, there's chemistry involved in it! The structure of hair Hair is made mostly of a protein called keratin, which is also present in nails. In hair, keratin molecules are arranged in straight bundles. These bundles are held together by disulphide bonds (-S-S-), which give strength to the hair. Disulphide bonds are made by the amino acid called cysteine. The cysteine of one keratin molecule forms a disulphide bond with the cysteine of the neighbouring keratin molecule. The more disulphide bonds there are in a strand of hair, the straighter it is. Ammonium thioglycolate: the perm salt Ammonium thioglycolate (HSCH2CO2NH4) is a compound that can break disulphide bonds. This is because it contains a thiol group (-SH). The thiol group replaces one of the sulphur atoms in the disulphide bond, like this: Keratin-S-S-keratin + 2HS-CH2CO2NH4 --> -HO2CH2CS-SCH2CO2H + 2NH3 + 2HS-keratin When the disulphide bond is broken, the keratin bundles come apart, and hair is weakened. Ammonium thioglycolate is therefore used widely in beauty parlours when customers want their hair re-styled. However, if you use too much of it, or if the reaction is left for too long, you could end up going bald. So do not, ever, try it at home! If you have watched the film Legally Blonde, you'll have seen Reese Witherspoon (acting...
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...that you follow your supervisors direction at all times. The only exception to this would be if you were directed to perform a task that was unethical, illegal, or unsafe. In the future if you fail to follow any company policy you will be subject to disciplinary action up to and including possible termination. Sincerely, Robert R. Smith Supervisor John E. Adams Employee My signature does not necessarily indicate that I am in agreement with the above statements; however, it does indicate that I was informed of the contents of this letter. Sample Employee Conduct Policy Every individual is expected to execute their assigned duties as directed during on duty time. Insuring quality in everything we do requires attention to detail and working quickly or carelessly has a negative impact on every aspect of our business. It is also critical to our success that every individual will respect and cooperate with other staff members, customers, and supervisors when performing their assigned duties. In the event there is ever a conflict it is the responsibility of everyone to bring that to the attention of their supervisor for resolution and will not engage with any...
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...Acid Rain --------- Acid Rain is caused by pollution containing sulfur dioxide, nitrogen oxide, and ozone ( SOý, NOx, and Oý ) is released into the air. These chemicals are absorbed into clouds and results in Acid Presipitation ( Acid Rain, Acid Snow, Acid Hail, Acid Sleet ). When the chemicals aren't absorbed into clouds, they can drift for miles and fall to the ground, resulting in Acid Deposition, or dry deposition. When Acid Rain falls into water it is mixed in with the normal water and causes the pH of the entire body to be raised. Measurments on the pH ( potential Hydrogen ) scale, rise exponentialy, thus, a lake with a pH of 4 is ten times as acidic as a lake with a pH of 5, and a lake with a pH of 3 is 100 times as acidic, After many rain falls of Acid rain, the pH of a normal lake ( 5.8 ) to 4. Acid Rain has been known to reach the acidicy of pH 2, ( battery acid has a pH if 1 ) this is a drastic change, as normal rain is average pH 5.2. Acid Rain can dissolve limestone and chalk, and corrodes outdoor structures. Statues and monuments that are left unprotected can fall victim to the unpredjudiced destruction of acid rain. Acid Rain reacts to different types of soil and rocks in two ways. 1) Acid rain will dissolve alkaline rocks and soil, or will neutralize the alkalinity. 2) Acid rain will increase the acidicy of already acidic rocks and soil, such as granite...
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...primary standards and give two examples. primary standard should fulfill the following requirements: 1) It should be100.00% pure, although 0.01-0.02% impurity is tolerable. 2) It should be stable to drying temperatures, and it should be stable indefinitely at room temperature. The primary standard is always dried before weighing. 3) It should have a high formula weight. A high formula weight will reduce experimental error since a relatively large amount of it will have to be weighed in order to get enough moles to perform the titration and, the relative error in weighing a greater amount of material is smaller than for a small amount. * Potassium hydrogen phthalate (usually called KHP) for standardisation of aqueous base and perchloric acid in acetic acid solutions * Sodium carbonate for standardisation of aqueous acids: hydrochloric, sulfuric...
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...Jonte Berry LAB 3 REPORT SHEET – ACIDS, BASES, INDICATORS, pH Procedure Number 3 Estimated pH with pH paper Vinegar (Ph 2) Soap + H2O (Ph 6) Tap water (Ph 8) Baking soda + H2O (Ph 9) Ammonia (Ph 13) 4 What color is your “red cabbage solution” when diluted with tap water? (The water turns ruby red) Do you think we will all have exactly the same color? Explain your answer. (No) 5 Solution color Estimated pH with cabbage indicator with cabbage indicator Vinegar (Light pink) (Ph 4) Soap + H2O (Clear Pink) (Ph 4) Tap water (Light blue) (Ph 10) Baking soda+H2O (Light light blue) (Ph 10) Ammonia (Clear) (Ph 10) 6 Describe what happened to the color of the solution when you mixed the vinegar and ammonia solutions. What do you estimate the pH of the solution to be with pH paper? (The pink color from the vinegar changes to light blue when the ammonia was added.) What do you estimate the pH of the solution to be with the cabbage indicator? (Ph 10) 7 What happened when you added the baking soda solution to the mixture of vinegar/ammonia? Describe your observations. (When I added the baking soda solution nothing happen at all.) What do you estimate the pH of the solution to...
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...Experiment 1 Determination of the Acetic Acid Content of Vinegar. Goal: During this experiment you will gain experience in working with volumetric glassware, and gain knowledge on how to determine the uncertainties in the volumes delivered by these. In addition, you will use a suitable titration to determine the concentration of acetic (ethanoic) acid in vinegar samples. Objectives: On completion of the laboratory you should be able to: Demonstrate proper techniques for using `pipette, burette and volumetric flask. Assess the random error in the volume delivered from the pipette and a burette. Accurately dilute a sample. Use a suitable titration to determine the concentration of ethanoic acid in vinegar. Theory: All measurements (volumes, lengths, weights etc.) have associated errors. Some, called gross errors, arise from mistakes (writing down the wrong number, recording the wrong units, etc.) but these can be easily avoided by working carefully. Others, called systematic errors, arise from equipment or instruments not operating according to their specifications (for example a pipette delivers 4.96 cm3 rather than the stated 5.00 cm3) or something goes wrong with the measurement procedure (for example there is something unexpected in the sample being studied (called an interferant) that results in the measurement being different from what it would be if the interferant was not there). Systematic errors lead to inaccurate results but can be avoided if the cause...
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...Warm water bath (not boiling).After 3 minutes, pour each tube of H2O2 into the corresponding tube of liver and observe the reaction. The boiling water bath will be left for 5 minutes, after which the liquid will be poured off and the liver will be placed into a 2ml solution of hydrogen peroxide. This is done to see the effect that boiling has one the enzyme. Record the rate of each reaction from 0(no reaction)-5(very fast). Test the effect of pH on catalase activity using basic, acidic and neutral solutions. 2 ml hydrogen peroxide will be added to each of 5 clean test tubes. Tube 1--add 3 drops of HCl (acid) Tube 2 - dilute HCl (1 drop / 3 ml) – add 3 drops Use pH paper to determine the exact pH Tube 3 – add 3 drops of NaOH (Base) Tube 4 – dilute NaOH (1 drop / 3 ml) - add 3...
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...with a base. Titration is the process of adding a known amount of a solution of known concentration to a known amount of solution of unknown concentration. The more accurately the concentration of the solution of known concentration is known, the more accurately the concentration of the unknown solution can be determined. Some chemicals can be purchased in a pure form and remain pure over a long period or time. Other chemicals are easily contaminated by the absorption of carbon dioxide or water from the air. Sodium hydroxide absorbs moisture from the air and often appears wet. Thus if a solution of sodium hydroxide is prepared by weighing the sodium hydroxide, the concentration of the solution may not be precisely the intended concentration. Potassium hydrogen phthalate on the other hand, has a lesser tendency to absorb water from the air and when dried will remain dry for a reasonable period of time. Potassium hydrogen phthalate may be purchased in pure form at reasonable cost. Potassium hydrogen phthalate is a primary standard. This means that carefully prepared solutions of known concentration of potassium hydrogen phthalate may be used to determine, by titration, the concentration of another solution such as sodium hydroxide. The equation for the reaction of potassium hydrogen phthalate with sodium hydroxide is: KCO2C6H4CO2H + NaOH ( KCO2C6H4CO2Na + H2O The equivalence point of a titration occurs when chemically equivalent amounts of acid and base are present...
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...out into the virtual field for additional research. Please type your answers on this form. When your lab report is complete, submit it to the Submitted Assignments area of the Virtual Classroom. Part I: Answer the following questions while in the Phase 1 lab environment. Section 1: You will be testing 4 known solutions for pH levels using a standard wide-range indicator. Based off of the results obtained in the lab room, fill in the following table: |Solution Number |pH from Lab |Acid, Base or Neutral? |Solution Name (what was in the test tube?) | |Solution 1 |6 |Acid |Pure Water | |Solution 2 |1 |Acid |Lemon Juice | |Solution 3 |12 |Base |Bleach | |Solution 4 |5 |Acid |Coffee | 1. How many drops of wide range indicator will you use for each test, based on industry standards such as the LaMotte field test? 10 Section 2: Now that you understand how to read pH measurements, go out into the field to gather pH samples from 3 different lakes to take back to the lab...
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...electronic effects of a substituent have an effect on the ionisation or polarity of a drug. This in turn may affect how easily a drug can pass through cell membranes or how strongly a drug will bind to a receptor. It is useful therefore to have some measure of the electronic effect a substituent can have on a drug. The intent of Louis Hammett, the founding father of QSAR, was to quantify the nature of a substituent (X) using easily measured physical properties. Dissociation of substituted benzoic acids was chosen as the model system. Benzioic acid is a weak acid that will dissociate to in water to form benzoate ions and hydronium ions. Benzoic acid is the proton donor (It is an acid) and water is the proton acceptor (It is the only avaialble base). benzoic acid benzoate hydronium H3O+ (H+) The dissociation constant (KH) in water for the above reaction is as follows: KH = [C6H5COO-][H+] [C6H5COOH] When a substituent is added to the above ring, the equilibrium is affected. The position of equilibrium is dependent on the substituent group X. If for example X is an electron withdrawing substituent this would result in the aromatic ring having a stronger electron withdrawing and stabilising influence on the carboxylate anion. The equilibrium will shift more to the ionised form. Therefore, substituted benzoic acid is a stronger acid. (KX increases). If X is an electron releasing substituent this results in the aromatic ring less able to stabilise the carboxylate...
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...In table one, KHP, a salt was used to titrate NaOH to find the molarity for the following two titrations. In table two and three, the known molarity of NaOH, a base, was used to find the molarity of acetic acid and sulfuric acid. The phenolphthalein indicator was used in all three titrations to make it possible to visually see when the solution reached the endpoint point. In the lab, it is impossible to record the equivalence point, when the moles of base equals moles of acid, so the endpoint is recorded. The endpoint is the point when the solutions turns from clear to light pink. The endpoint is very close to the equivalence point so it is assumed that they are same in the lab. This allows the moles of the acid to be found and the molarity to be calculated. The accuracy of this technique could be improved if it was possible to measure the equivalence point instead of the endpoint. Overall, the precision and accuracy of this test is good, but could be improved by performing more tests and averaging them...
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