Abstract: Introduction: Materials: * Chemicals: Buffer solution‚ pH 7.0‚ 50 mL Phenolphthalein indicator solution‚ 1.0 %‚ 1 mL Potassium hydrogen phthalate‚ KHC8H4O4‚ 2 g sodium hydroxide solution‚ NaOH‚ 0.1 M‚ 150 mL Unknown weak acid‚ 1.5g Water‚ distilled or deionized * Equipment: Balance Stir bar Beaker‚ 250mL Oven Buret‚ 50 mL pH sensor Desiccator Rising stand and buret clamp Erlenmeyer flask‚ 125mL Wash bottle with distilled water Funnel Weighing dishes‚ 2
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Experiment Acids‚ Bases‚ and Neutrals Problem Are common house-hold products pH balanced and neutral? Information Gathered pH measures how acidic or alkaline a solution is. The pH scale ranges from 0-14. Solutions that range from 0-6 are considered to be acidic. Solutions that are on the acidic end of the scale are low in pH‚ high in hydrogen ion‚ and low in hydroxyl ions. An acid has a sour taste‚ hence‚ will react to metal and will be corrosive; therefore‚ they are considered as an electrolyte
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9.1 Sulphuric Acid Sulphuric Acid is Manufactured in Industry 1. Sulphuric acid‚ H2SO4 is manufactured in industry through Contact Process. 2. The raw materials used are sulphur‚ air and water 3. The Contact process consists of three stages. Stage 1: The production of sulphur dioxide This can be obtained by two methods: 1. Burning of sulphur in dry air in the furnace S + O SO2 2. Burning of metal sulphide such as zinc sulphide or iron(III) sulphide in dry air. 2ZnS
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ACID/BASE You might need to know the following K values: CH3COOH Ka = 1.8 x 10–5 Benzoic Acid Ka = 6.5 x 10–5 HNO2 Ka = 4.5 x 10–4 NH3 Kb = 1.8 x 10–5 HF Ka = 7.2 x 10–4 H2S Ka = 5.7 x 10–8 HSO4– Ka = 1.2 x 10–2 HS– Ka = 1.2 x 10–13 HCOOH Ka = 1.8 x 10–4 HOCl Ka = 3.0 x 10–8 SIMPLE ACIDS AND BASES 1. According to the Brønsted–Lowry definition‚ which species can function both as an acid and as a base? (A) Cl– (B) SO42– (C) NH4+ (D) HCO3– (E) H3O+ 2. Which of the following
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to practice common organic laboratory techniques inside the lab to get one oriented to the basic methods of procedure that can be used for later experiments. This experiment involves the separation of benzoic acid from a more crude form‚ consisting of benzoic acid‚ methyl orange‚ a common acid/base indicator‚ and cellulose‚ a natural polymer of glucose (Huston‚ and Liu 17-24). The technique that is used to perform this separation is called extraction. Extraction is a systematic process of separating
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Oxalic Acid Lab Aim: Use acid base titration to determine the number of water molecules in hydrated hydrochloric acid. Apparatus required: Oxalic acid solution 250 cm3 Weighing bottle Digital balance Beaker (250 cm3) Distilled Water Volumetric Flask 250cm3 Filter funnel Pipette Burette 50cm3 Retort Stand Beakers 100cm3 Standardized sodium hydroxide solution 0.1M Pipette filter Conical flasks 250cm3 Phenolphthalein Indicator Procedure 1) Rinse the burette with distilled
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Federal Agency Security Practices (FASP) - NIST.gov - Computer ... csrc.nist.gov › Groups › SMAJan 28‚ 2001 – The FASP effort was initiated as a result of the success of the Federal CIO Council ’s Federal Best Security Practices (BSP) pilot effort to identify‚ ... [DOC] Network Perimeter Security Policy - Computer Security Resource ... csrc.nist.gov/.../network_security/ipdmms-perimeter-security.d...File Format: Microsoft Word - Quick View The Department Interim Network Perimeter Security Standard
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Max Weber Foundation – German Humanities Institutes Abroad Principles of the Tasks and Processes of Quality Assurance in the Max Weber Foundation In accordance with Art. 6‚ Para 3‚ Item 5 of the DGIA law‚ the Board of Trustees monitors the “activities of the institutes and other bodies of the foundation and arranges the evaluation of the institutes”. The principles of evaluation are listed in detail in the statutes of the Max Weber Foundation. To guarantee a scientifically adequate and transparent
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Sdadsjad;jsajdsa;ljdj;sajkd’jksad Dfsakdf’askd’ksadsad Asdf Sakd Askdsad Reading | Read Ch. 8‚ “Troubleshooting Operational Problems” of CompTIA Strata Study Guide. | Reading | Read the Week Five Read Me First. | Reading | Review articles found in the search criteria in the Electronic Reserve Readings. | Learning Team New System Proposal | Finalize work on your paper.Update your work from previous weeks with any feedback received and new information learned along the way‚
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INSTRUCTIONS FOR ASSIGNMENT SUBMISSION By Students (Applicable to those which are available in EduNxt) 1. Completed assignments must be typed and formatted neatly and soft copies should be uploaded on or before May 15th‚ 2013. 2. You may download the Assignment Question Paper by clicking on the link provided on EduNxt portal. 3. Ensure that you answer all questions according to the marks allocated (not more than 400 words for a 10-mark question and not more than 200 words for a five-mark
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