This was done by diluting from the 6 M solution that was provided. Next‚ 0.715g of KHP was weighed using the glazed paper and the triple beam balance. The KHP was then transferred to the 250 mL Erlenmeyer flask. Using a graduated cylinder‚ 50 mL of deionized water was measured and added to the flask. The KHP was dissolved in the water‚ and few drops of phenolphthalein were added. Moreover‚ the burette was rinsed with deionized water‚ then with NaOH solution. Then‚ it was filled with 50 mL NaOH. The
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UNIVERSITY LABORATORY SAFETY MANUAL Prepared by: OSU Environmental Health & Safety 120 Physical Plant Stillwater‚ OK 74078-0113 405-744-7241 December‚ 1999 This document describes the Chemical Hygiene Plan for (department or laboratory name‚ building‚ room number(s) ) at Oklahoma State University‚ as required by Title 29 Code of Federal Regulations Part 1910‚ Subpart Z‚ Section .1450 (29 CFR 1910.1450)‚ "Occupational Exposures in Laboratories" referred
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vitamin C tablet. Once the tablet has dissolved completely‚ transfer the solution into a 250 ml volumetric flask via a plastic filter funnel. Rinse the beaker twice with some deionised water and transfer the washings into the volumetric flask. Rinse the filter funnel as well. At this point‚ more water is added carefully until the bottom of the meniscus is right on the line. Stopper the flask and complete the mixing by repeated inversions with swirling and shakings in between. Keep your hand on the
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First you will need to analyse a solution of ascorbic acid with a known composition. By doing this you will be able to tell how accurate your experiments are. Pipette 25.0 cm3 of an ascorbic acid solution containing 1.0 g dm–3 into a conical flask. Add 25.0 cm3 of potassium iodate(V) solution‚ 5.0 cm3 potassium iodide solution and 5.0 cm3 sulfuric acid. Titrate the iodine remaining with the sodium thiosulfate solution using starch indicator. Are the amounts of materials that you used appropriate
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mixture’s code in the data section. 2. Add approx. 25-50 mL of water and several boiling chips to a 125 mL Erlenmeyer flask and heat the water to a gentle boil using a hotplate. 3. On a second hotplate‚ place a 125 mL Erlenmeyer flask containing the one gram of unknown solid along with a boiling chip. 4. Using a ring clamp‚ slowly pour approx. 5-10 mL of boiling water into the flask containing the impure substance- does not need to be exact 5. After water is added‚ swirl the mixture for one minute
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to dissolve the entire mix since it is not homogeneous. 2) Pour the solution into a separatory funnel. 3) To extract the nicotinamide from the mixture‚ add 5 mL of 5% HCl and shake gently. Draw off the lower aqueous layer into 125 mL Erlenmeyer flask and repeat the extraction with a second portion of HCl. Combine the three extracts and then set this mixture aside. 4) To separate the trans-cinnamic acid from the mixture‚ extract the ether solution twice with 5 mL of 5% sodium bicarbonate. Combine
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Acid Aim Equipment 1. Erlenmeyer flask 2. Graduated cylinder 3. Hot plate 4. Small beaker 5. Ice bath (if necessary) 6. Filter paper 7. Buchner funnel 8. Spatula 9. Weighing machine Method 1. Weighing paper was used to weigh approximately 1.00g of ‘impure Benzoic acid to produce re crystallization’. 2. Moved it to a 125ml Erlenmeyer flask. 3. Poured approximately 20ml of distilled water by using a graduated cylinder to the flask. 4. The mixture went to the boiling point
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Title Laboratory Techniques and Measurements Purpose The purpose of this experiment is to determine mass‚ length‚ temperature‚ volume‚ and density of objects and liquids using common measuring devices and algebraic formulas. The metric system‚ the most common set of measurements used in science‚ which includes meters‚ liters‚ Celsius‚ and grams will be used. Procedure The following items were used within the experiment: (1) Metric ruler with centimeter (cm) and millimeter (mm)‚ (1)
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Scientific laboratory technician : Job description More in this section 1. Job description 2. Salary and conditions 3. Entry requirements 4. Training 5. Career development 6. Employers and vacancy … 7. Related jobs Print all pages in this section Case studies * Research chemist: Dave * Laboratory technician: Abbas Scientific laboratory technicians are responsible for laboratory-based tasks‚ which include sampling‚ testing‚ measuring‚ recording and analysing
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apparatus to obtain the cloves oil substance. Then with the mixtures of water and dichloromethane to form two immiscible layers. The layers were dichloromethane substance and aqueous The entire substances that are separated into two individual flasks. Then doing the rest of the chemistry experiment and performing all of the necessary techniques (extract the chemical substances Eugonol and Acetyleugenol) from the clove oil. Introduction “The Isolation of Eugenol using the Steam Distillation
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