potassium ion in a compound will color a flame violet. But on the other hand‚ even trace amounts of sodium ions in a compound produce a very strong yellow flame‚ often times making the potassium ion very difficult to detect. To counteract the effects of any sodium impurities‚ one can view the flame through a piece of cobalt blue glass. The cobalt glass absorbs the yellow light given off by sodium while letting most other wavelengths of light pass through. In this activity‚ wooden
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Chemistry F332 Notes Ions in solids and solutions: Structure of an ionic lattice (Sodium Chloride): * Consists of sodium ions (Na+) surrounded by six chloride ions (Cl-) * Chloride ions also surrounded by six sodium ions. * Held together by attraction of oppositely charged ions. * Giant ionic lattice. * Electrostatic bonds hold lattices together. * Structure is simple cubic. * Some ionic crystals contain water. * Known as water of crystallisation. * These crystals
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find a new known solution. You will repeat the above steps with each solution. When you test the solution containing a sodium compound‚ observe and record the color of the flame. Test it again by observing the flame through two pieces of cobalt blue glass held together. Record the flame color with the cobalt blue glass on a separate line. You will observe the solution of sodium chloride mixed with potassium chloride without the cobalt blue glass and then again with the cobalt blue glass. Record the
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How fast is your reaction? Part 1 – How temperature affect the rate of reaction Chemical equation Magnesium + hydrochloric acid → magnesium chloride + hydrogen Mg + 2HCL → MgCl2 + H2 Graph Conclusion and questions 1. What factors/variables did you keep the same in this experiment? * We kept the same volume of hydrochloric acid (10 cm3) and the magnesium ribbon (5cm) because that way we could get a fair test experiment. We also repeated
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events‚ reactions‚ and phenomenons. Stoichiometry is a tool that is frequently used in environment science since almost nothing in nature is in its ideal states‚ which is why it was a useful tool for us in this experiment. The different amounts of sodium sulfate and calcium chloride dictated the experiments theoretical yields and percent yield‚ which was good because we need to recognize which reactants would be in short
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Volume of sodium thiosulphate Na2S2O3 solution used It will be kept fixed at 2 cm3 throughout the experiment. Volume of starch solution used It will be kept fixed at 5 drops throughout the experiment. Volume of iodide I- solution used It will be kept fixed at 10cm3
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TABLE OF CONTENTS 1. IA (Alkaline Metals) 1.1. H………………………………………………………………………..2 1.2. Li………………………………………………………………………..2 1.3. Na………………………………………………………………………2 1.4. K………………………………………………………………………..3 1.5. Rb………………………………………………………………………3 1.6. Cs………………………………………………………………………3 1.7. Fr……………………………………………………………………….4 1. IIA (Alkaline Earth Metals) 2.8. Be………………………………………………………………………4 2.9. Mg………………………………………………………………………4 2.10. Ca………………………………………………………………………4
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3H2SO4 (aq) 3I2 (aq) + 3H2O (l) + 3K2SO4 (aq) The iodine produced reacts with ascorbic acid immediately. Then‚ the iodine left is titrated by a standard solution of sodium thiosulphate. 2Na2S2O3 (aq) + I2 (aq) Na2S4O6 (aq) + 2NaI (aq) Since the concentration of standard sodium thiosulphate solution is unknown‚ sodium thiosulphate solution is first titrated against iodine. Since the end-point of the titration is not observable‚ starch solution is added to act as an indicator since
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Name Naza Moore ID# 24120389 Lab# 2 Lab instructors Alecia Palmer and Donald Burke Course Instructor Maureen Wilson Lab Title Preparation of cyclohexene from cyclohexanol Aim Preparation of an Alkene by dehydration of an alcohol in the presence of a catalyst. Calculate the percentage recovery of products. Test for purity and identification of products. Abstract Cyclohexene and cyclohexanol are both colourless aromatic compounds. The major difference between the two is the presence
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(Capsicum annumL.) by Na2SO4 Salinity Sundas Zahoor‚ Hafza Abira Najam‚ Ummah Romana‚ Fatima Asghar Diyyal and Aqsa Nasir University of Gujrat‚ Gujrat‚ Pakistan Abstract: The present research was carried out to evaluate response of chili plants to sodium sulphate (Na 2So 4) salinity. There were three levels of Na2SO4 including control i.e. 0‚ 30and 60ppm. Experiment was laid down in completely randomized design (CRD) with three replicates. The result showed that the plants have no treatment of
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