Revision checklist for IGCSE Chemistry 0620 A guide for Students Revision checklist for IGCSE Chemistry 0620 A guide for students How to use this guide The guide describes what you need to know about your IGSCE Chemistry examination. It will help you to plan your revision programme for the theory examinations and will explain what the examiners are looking for in the answers you write. It can also be used to help you to revise by using tick boxes in Section 3‚ ‘What you need to know’‚ to check
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Ordinary Level 2 INSTRUCTIONS TO SUPERVISORS For Question 1 Candidates will require the following. (a) Approximately 2.0 mol/dm3 hydrochloric acid (HCl)‚ labelled P. Allow each candidate approximately 200 cm3. (b) Approximately 2.0 mol/dm3 sodium hydroxide (80 g/dm3 NaOH)‚ labelled Q. Allow each
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changes that are occurring. As each reaction occurs‚ record the well number and observations. 1. Sodium Bicarbonate + Hydrochloric Acid 2. Hydrochloric Acid + Bromothymol blue 3. Ammonia + 1 drop Bromothymol blue 4. Hydrochloric acid + blue dye 5. Blue dye + Sodium Hypochlorite. Observe & add 1 drop of hydrochloric acid. 6. Potassium iodide + Lead Nitrate. A precipitate should form. 7. Sodium hydroxide + phenolphthalein. a. Phenolphthalein is an acid-base indicator. 8. Hydrochloric acid
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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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How does the amount of dissolved NaCl in water effect the volume of one drop? Aim: This experiment plans to measure the volume of one drop of water and compare it the volume of one drop of sodium chloride solution. What will be attempted by this experiment is to measure the volume of one drop of distilled water by measuring a control and comparing it the volume of one drop of distilled water with dissolved NaCl. This will be done by using a burette for dropping the distilled water and a electrolyte
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Determination of the Empirical Formula for Zinc Chloride Name:__________________________________________ Course______ Period:____ Prelab Show your Calculations for the following problems 1. How many grams of sulfur would combine with 26.1 g of potassium to form K2S? 2. A 1.31g sample of sulfur was reacted with chlorine to form 4.22g of compound. What is the empirical formula of the compound? 3. 0.256g of a lanthanum oxide was decomposed and produced 0.219g of lanthanum. What is the
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SYLLABUS Cambridge O Level Chemistry 5070 For examination in June and November 2014 University of Cambridge International Examinations retains the copyright on all its publications. Registered Centres are permitted to copy material from this booklet for their own internal use. However‚ we cannot give permission to Centres to photocopy any material that is acknowledged to a third party even for internal use within a Centre. © University of Cambridge International Examinations 2011 Contents
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interface unit receives an analog signal from the sensors and converts it to a digital signal then sends it for saving in the computer. Preparation of NaCl Solution The salt solution was prepared by weighing (15‚ 35‚ and 45) gm of Annular (sodium chloride NaCl‚ M 58.44‚ Didactic) using sensitive balance (Kern-PLE 310-3N). Each sample was dissolved in one liter of distilled water and then mixed using magnetic stirrer (MR Hei. Standard). An electric conductivity monitor (Model DDS 307) was used to
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azo dye was created by reaction of diazonium salt with N‚N-Dimethylanaline. The final product created was 4-dimethylaminoazobenzene-4-sulfonic acid‚ an orange clay-like substance. Sulfanilic acid was chemically manipulated by using sodium carbonate followed by cooled sodium nitrate and hydrochloric acid to form the diazonium salt used in the reaction. The products were washed in ethanol. The product was obtained at an 84% yield and was characterized by its physical attributes. Results and Discussion:
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detection of anions in a given solution. Method: CO3 Solution Iodine Solution 6M Nitric Acid SO4 Solution Sulphric Acid(H2SO4) Chloride Solution 6M Asetic Acid(CH3COOH) Barrium Chloride(BaCl2) 6M HCl(Hydrochloric acid) Silver Nitrate(AgNO3) 1M Potassium Nitrate(KNO2) Calcium Chloride (CaCl2) Barrium Hydroxide Ammonium Hydroxide (NH3OH) Methylene Chloride Test Tube/Test Tube Holder Eye Dropper Eye Dropper Beaker Pipette Pipette Bulb Litmus Paper Hot Plate Observations/Calculations:
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