Experiment 39 Oxidation – Reduction Titrations II : Analysis of Bleach A. Standardization of 0.05 M Na2S2O3 Solution KIO3 concentration 0.01 M Volume of KIO3 Trial #1 Trial #2 Final burette reading 15.01 mL 30.00 mL Initial burette reading 0.00 mL 15.01 mL Milliliters of KIO3 used 15.01 mL 14.99 mL Volume of Na2S2O3 Trial #1 Trial #2 Final burette reading 13.40 mL 25.78 mL Initial burette reading 0.03 mL 13.37 mL Milliliters of Na2S2O3 used
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in case of skin contact (irritant‚ permeator)‚ of eye contact (irritant)‚ of ingestion‚ of inhalation. Slightly hazardous in case of skin contact (sensitizer). Dichloromethane (CH2Cl2) 84.93 -96.7 Soluble in water Miscible in acetate‚ alcohol‚ alkane‚ benzene‚ CCl4‚ ether‚ CHCl3 Very hazardous in case of eye contact (irritant)‚ of ingestion‚ of inhalation. Hazardous in case of skin contact (irritant‚ permeator). Inflammation of the eye is characterized by redness‚ watering‚ and itching Sodium
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abundantly to compost…” (Ryan Drum‚ 2012) “Seaweeds are 20-50% dry weight mineral… the elements abundant in seaweeds include: potassium‚ sodium‚ calcium‚ magnesium‚ zinc‚ copper‚ chloride‚ sulfur‚ phosphorous‚ vanadium‚ cobalt‚ manganese‚ selenium‚ bromine‚ iodine‚ arsenic‚ iron‚ and fluorine” (Kazutosi‚ 2002). “Fertilizers from seaweeds result to increase crop
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also reacts with almost all the acids and alkalies‚ forming a variety of different compounds and by products. Another important property of magnesium is that it actively reacts with many non-metals such as nitrogen‚ phosphorous‚ chlorine‚ sulfur‚ bromine‚ iodine and fluorine. Magnesium also readily reacts with some other compounds such as carbon monoxide‚ carbon dioxide‚ sulfur dioxide and nitric oxide. Magnesium has an appearance of a silvery and white shade. Among all the structural metals‚ magnesium
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inexpensive. However‚ research on CFCs showed that they have long life spans allowing them to resist being washed away in rain. Through the aid of wind‚ CFCs rise up into the stratosphere and into the ozone layer where they decompose into chlorine and bromine‚ from the ultraviolet radiation. These two chemicals are responsible for damaging the ozone layer. Some atmospheric chlorine are caused by natural occurrences such as large fires and volcanic eruptions‚ yet most chlorine in the ozone layer is due
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Name:____________________________ Date:_____________________ Period:_______ Chemistry Chapter 5 Review: 1. How does the energy of an electron change when it moves closer to the nucleus? 2. The principle quantum number indicates what property of an electron? 3. What shape are s orbitals and p orbitals? 4. What is the maximum number of f orbitals in one energy level of an atom? 5. What is the maximum number of d orbitals in one principal energy level of an atom? 6. What is the maximum number
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Study material CHEMISTRY CLASS: XII KENDRIYA VIDYALAYA SANGATHAN LUCKNOW R E G I O N 2009-2010 Study Material Class XII -Chemistry SHRI RANGLAL JAMUDA IAS‚COMMISSIONER CHIEF Patron KENDRIYA VIDYALAYA SANGTHAN NEW DEHLI SHRI M.S Chauhan Asst. Commissioner Patron Kendriya Vidyalaya Sangthan Lucknow Region SHRI S.S. Rawat Guidance Smt. A.N Siddiqui (Education officer) (Education officer) SHrI K.‚M. Bhatnagar (Education officer) Co-ordinator SHRI. T. Singh Principal K.V. No. 2
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Chemistry SCH3U Unit 1 Lesson 1 Key Questions 1. List three physical properties and one chemical property of a) an iron nail * conducts heat and electricity well * solid at room temperature * ductile * rusts in water (chemical) b) gasoline * liquid at 20deg C * boils between 20 and 200 degrees Celsius * not soluble in water * flammable in the presence of oxygen (chemical) 2. People in a workplace should have access to MSDS sheets so that * chemicals
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Experiment II. Separation Of a Sample Mixture By Liquid-Liquid Extraction Reading assignment: Techniques in Organic Chemistry 2nd ed pages 75-99. 3rd ed pages 113-140. Topics and Techniques i) identification of solvent layers of two immiscible solvents ii) partioning of a compound between two immiscible solvents and determination of KD iii) liquid-liquid extraction with aqueous acids and bases with organic solvents. iv) use of drying agents Introduction Liquid-liquid extraction is a method
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Main air pollutants and their sources Carbon Monoxide- motor cars‚ cigarettes‚ bush‚ forest and farm fires‚ slow combustion stoves Oxides of nitrogen (NO+NO2)- combustion (vehicles and power stations) Particulates (soot)- combustion (transport and industry)‚ many industrial processes (mining)‚ bush fires‚ farms and forest burn-offs‚ backyard incineration; abets in dust from insulation and pre-1986 fibrous cement board in old buildings and from their demolition Airborne lead- lead smelters (Broken
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