1 Measuring and calculating equilibrium constants Clearly‚ if the concentrations or pressures of all the components of a reaction are known‚ then the value of K can be found by simple substitution. Observing individual concentrations or partial pressures directly may be not always be practical‚ however. If one of the components is colored‚ the extent to which it absorbs light of an appropriate wavelength may serve as an index of its concentration. Pressure measurements are ordinarily able to measure
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Practical 3 Investigation of Action of Saliva and Hydrochloric Acid in Two Carbohydrate Solution | Objective: 1. To show the action of saliva in two carbohydrate solutions. 2. To show the action of hydrochloric acid in two carbohydrate solutions. Apparatus & Equipment’s: Boiling tubes Metal test tube racks Beaker Graduated plastic dropper Water bath‚~37°C Water bath‚~95°C Stop watch
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Abstract Tetramethylammonium iodide was dissolved in a mixture of of Iodine and 95% ethanol while gently heated in a fume hood. Once cooled‚ crystals started to form in the beaker‚ which were then collected and washed with hexane through a series of processes involving vacuum filtration. Then a mixture of 5mh of the crystals and 5ml of 95% ethanol was created and tested on a slice of potato to analyse the iodine content. After‚ with sodium thiosulphate in the buret‚ the iodide solution was titrated until
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keep it simple science Ryde Secondary College‚ SL#710371 INDUSTRIAL CHEMISTRY What is this topic about? To keep it as simple as possible‚ (K.I.S.S.) this topic involves the study of: 1. THE CHEMICAL INDUSTRY 2. CHEMICAL EQUILIBRIUM 3. PRODUCTION OF SULFURIC ACID 4. PRODUCTION OF SODIUM HYDROXIDE 5. SOAP & DETERGENTS 6. THE SOLVAY PROCESS FOR Na2CO3 ...all in the context of the applications of Chemistry in human society. 1. THE CHEMICAL INDUSTRY The “Invisible” Industry Most people are familiar
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once more or until cleaned. The Formation of a Precipitate 1. Using 2 modified‚ beral pipets fill the bulb of pipet A about 1/5 full of 0.1M Pb (C2H3O2) 2(lead acetate) and fill the bulb of pipet B about 1/5 full of 0.1M Kl (potassium iodide) 2 Place the 2 pipets on the beam balance and read and record the total mass of the 2 pipets. 3. Carefully telescope the stem of pipet A into the stem of pipet B without spilling any liquid. 4. Mix the solution by gently squeezing
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w w ap eP m e tr .X w om .c s er UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS International General Certificate of Secondary Education 0620/12 CHEMISTRY Paper 1 Multiple Choice May/June 2010 45 Minutes Additional Materials: *8778752636* Multiple Choice Answer Sheet Soft clean eraser Soft pencil (type B or HB is recommended) READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples‚ paper clips‚ highlighters‚ glue or correction
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Abstract: A qualitative analysis experiment was conducted to determine the identity of an unknown aldehyde or ketone. The tests include a Tollens test‚ a Schiff test‚ an iodoform test‚ and a derivative melting point test. The data of the first three tests was inconclusive. The final derivative melting point test was utilized to successfully determine that the unknown was the ketone‚ Propiophenone. Introduction: Qualitative analysis is a method or series of methods used to determine the
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only one shell. 9. What is an ion? An ion is an atom that has become stable by gaining or losing electrons. 10. A positive ion is called cation and a negative ion is called anion. 11. Ionic bonds form between a metal and a non metal. 12. Covalent bonds form between two non-metals. 13. What is a polyatomic ion? How do you recognize a polyatomic ion in the NAME of a compound? A polyatomic ion is a group of atoms which act as a single ion. All polyatomic ions (except ammonium and hydroxide)
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the solute and the solvent. b. Classify the solute and the solvent as polar‚ nonpolar or ionic. c. Identify the solute-solute‚ solvent-solvent and solute-solvent attractive forces. Lewis Structures Solutes: NaCl Naphthalene Glycerol Potassium Iodide Iodine Crystal Solvents: Distilled water Ethyl Alcohol Toluene Solutions Polar‚ Non-Polar or Ionic Attractive Forces NaCl + Distilled Water Solute NaCl Solute-solute Solute-solvent Solvent Distilled water Solvent-solvent NaCl
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Rhodium No direct synthesis of safrole has been recorded‚ the most recent attempt being that of Baker and Robinson (JCS‚ 1925‚ 127‚ 1424)‚ who distilled the product of the action of silver oxide and water upon gamma-piperonylpropyltrimethylammonium iodide‚ but obtained isosafrole‚ the double bond moving into the position of greater stability. Kawai (Sci. Papers Inst. Phys. Chem. Res.‚ 1925‚ 3‚ 263) has shown that the monoallyl ether of pyrocatechol undergoes the Claisen rearrangement to give an oil
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