590nm with the same energy. They shared the same line spectra and qualities‚ leading to the conclusion that Unknown A was certainly NaCl. Unknown B was also determined through these three qualities‚ leading to the understanding that Unknown B was CaCl2 as they also shared the same line spectra and very similar flame color. Regardless of the excitation source (flame or electricity)‚ the line spectrum would be the same‚ resulting in these same answers‚ as it is still the emittance of visible
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4/6/2014 Thermochemistry and calorimetry Chem 1 General Chemistry Virtual Textbook → Chemical Energetics →Thermochemistry Thermochemistry and calorimetry Chemical Energetics and thermodynamics - 4 The heat that flows across the boundaries of a system undergoing a change is a fundamental property that characterizes the process. It is easily measured‚ and if the process is a chemical reaction carried out at constant pressure‚ it can also be predicted from the difference between the
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0 M0.34 MDilute 34 mL of 1.0 M KMnO4 to 100 mL.Copper (II) sulfateCuSO41.0 M0.25 MDilute 25 mL of 1.0 M CuSO4 to 100 mL.Ammonium hydroxideNH4OH1.0 M0. 43 MDilute 43 mL of 1.0 M NH4OH to 100 mL.Sodium carbonateNa2CO31.0 M0.56 MDilute 43 mL of 1.0 M Na2CO3 to 100 mL. Remember‚ you cannot make a solution that is more concentrated than the original solution. Solution Dilutions KEY Directions Using the 100 mL solutions that you just prepared and the formula for
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ether and the ether layer is disposed of. The washing ensures that tube 3 is strictly phenol. Recovery of the neutral substance Tube 1’’ is washed with saturated NaCl (0.3 ml) and the aqueous layer is discarded. To make sure all the water is removed CaCl2 drying pellets are added and the solution is transferred to a pre-weighed tube (tube 4). Tube 1’’ is rinsed 2-3 times with ether and the rinsing is placed into tube 4. Tube 4 is
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CERTIFICATE This is to certify that this dissertation titled “STUDY OF QUANTITY OF CAESIN PRESENT IN DIFFERENT SAMPLES OF MILK” submitted by Raunak Padamtintiwar to Chemistry department of Nirmal Higher Secondary School carried under guidance and supervision during the academic year 2014-2015. Mr Ninan Sir ACKNOWLEDGEMENT I wish to express my deep gratitude and sincere thanks to the Sir‚ for his encouragement and for all the facilities that he provided for this project work. I sincerely appreciate
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Abstract This work describes the extraction of caffeine from tea leaves to determine its % caffeine. The extraction process selectively dissolves one or more compounds in a mixture into an appropriate solvent. In this experiment‚ it was visible in the process wherein the components of the tea leaves were dissolved in two solvents‚ water and dichloromethane (DCM)‚ with DCM used for multiple extractions. The organic layer was evaporated and the determined % caffeine was 0.12%. Furthermore‚ the purified
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hypotonic to the blood D) nontonic to the blood E) hypertonic to the blood 3) Water is a polar solvent and hexane (C6H14) is a nonpolar solvent. Which of the following correctly describes the solubility of the solute in the given solvent? A) CaCl2‚ soluble in hexane B) octane‚ soluble in water C) CCl4‚ soluble in water D) mineral oil‚ soluble in water E) NaHCO3‚ soluble in water 4) What is the concentration‚ mass/volume percent (m/v)‚ of a solution prepared from 46 g NaCl and 2.5 L of
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Chapter:-8 The d-and f-Block Elements POINTS TO BE REMEMBERED: --- The elements of periodic table belonging to group 3 to 12 are known as d-Block elements. The general electronic configuration of these elements is (n -1)d1-10 ns 1-2 d- Block elements are collectively known as Transition Elements because properties of these elements vary in between s-Block and p-Block elements. A transition element should have partially filled (n-1) d orbital. Group 12 elements i.e. Zn
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HKDSE Chemistry – A Modern View 1 (SAMPLE) Suggested Answers (Coursebook) |Chapter 1 The fundamentals of chemistry | |Class Practice |1 | |Chapter Exercises |3 | |Chapter 2 The atmosphere
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A series of 250ml Erlenmeyer flasks containing 100ml of M1 medium (0.2g NaNO3‚ 0.05g KCl‚ 0.05g MgSO4.7H2O‚ 1g glucose‚ 0.001g FeCl3‚ 0.02 g BaCl2‚ 0.05g CaCl2) at pH 6.8 with an addition of increasing concentration of deltamethrin was prepared. 1ml of 108 fungal spore suspension cultures was added into each of these flasks. These flasks were incubated at 280± 20C on the shaker at 120rpm for 7 days. Mycelium
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