Lab 4. Volumetric Determination of Impure Sodium Carbonate (Na2CO3) Introduction: To determine the total amount of carbonate in unrefined sodium carbonate‚ soda ash‚ a titration is done using a standardized solution of HCl. Aqueous HCl is a strong acid and therefore almost completely disassociates into H+ and CL-. Therefore‚ when HCl is used in a titration‚ the H+ is the titrant. Carbonate in aqueous solution is able to accept a proton‚ i.e. it acts as a base. When carbonate accepts the H+ a bicarbonate
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Analysis of Soda Ash and Volumetric Analysis of a Carbonate-Bicarbonate Mixture Buti‚ Mary Daphne A. Department of Chemical Engineering‚ Faculty of Engineering University of Santo Tomas España‚ Manila Abstract Sodium carbonate (Na2CO3)‚ commonly known by trade name soda ash‚ is a white‚ anhydrous‚ powdered or granular material that is an essential raw material used in the manufacturing of glass‚ detergents‚ chemicals‚ and other industrial products. In this experiment‚ the percent alkalinity
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Priya Chauhan August 27‚ 2012 Period 3 Rainbow Lab Objectives: We should develop skills measuring chemicals with a graduated cylinder. We should practice using the metric system. We should have the ability to follow directions and to test precision. We should practice lab safety procedures. Procedures: Part 1: Label six tubes in order: A‚ B‚ C‚ D‚ E‚ and F. Fill a beaker half way with water. Use it to rinse your graduated cylinder and test tubes. The second beaker is for
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Candidate name…………………………………………………………………….. MINISTRY OF EDUCATION MASALA SECONDARY SCHOOL BOARD MOCK EXAMINATION 2014 SCIENCE 5124/3 PAPER 3 (CHEMISTRY) 1hour 15minutes Additional materials: Monday 30th July 2014. Answer paper INSTRUCTIONS TO CANDIDATES Write your name‚ centre number and candidate number at the top of this page all separate Attempt all questions in SECTION A and only TWO questions in SECTION B SECTION A (45 marks)
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Organic vs. non organic There is a vast majority of food in our world today‚ when we consume this food we must stop to think about what exactly it is made of. In today’s society we are always looking for the best healthy foods that are available to us. We want good‚ nutritious‚ healthy foods so that we can live a long and healthy life. We live in a world where we have fast‚ cheap and processed foods all around us. Have you ever considered going a different route? Organic is a different way to eat
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I. Introduction: Thesis Statement: People should consume organic foods because they have More nutritious‚ No pesticides are used on them‚ No hormones or antibiotics are used in their production A. Major Proposition or Premise (before because): People should consume organic foods B. 1st Minor Proposition or Premise (after because): More nutritious. C. 2nd Minor Proposition or Premise (after because): No pesticides are used on them. D. 3rd Minor Proposition or Premise (after because):
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of one or more compounds‚ is injected into the column and is carried through the stationary phase by atmospheric air‚ which acts as the mobile phase. The nonpolar coating of the stationary phase most strongly retains solutes of the same polarity. Organic compounds flowing out of the chromatography column are then detected by a chemical sensor that produces electrical responses proportional to the concentration of the compounds. The presence of such a chemical at the detector is seen as a peak on a
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CHAPTER # 1 Q.DEFINE CHEMISTRY. A. Chemistry‚ a branch of physical science‚ is the study of the composition‚ properties and behavior of matter. Chemistry is concerned with atoms and their interactions with other atoms‚ and particularly with the properties of chemical bonds. Chemistry is also concerned with the interactions between atoms and various forms of energy Q.DEFINE THE BRANCHES OF CHEMISTRY. * Physical chemistry is the study of macroscopic‚ atomic‚ subatomic‚ and particulate phenomena
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Unit 1 – Lesson 1 Chemistry Key Questions 1. Element Standard Notation # Of Electrons # Of Protons # Of Neutrons Sodium 23 11 Na 11 11 12 Chromium 24 Ca 26 26 27 ? Phosphorus 32 P 15 15 16 2. Fireworks; Which metals burn to produce these colours? Red – Lithium (Sr) Blue – Cesium (Cs) Pink – Potassium (K) Yellow/Green – Copper (Cu) Orange – Carbon (Ca) 3. Let’s say that the three bottles contain Fe(NO3)3‚ BaCl‚ and AgNO3. These are Iron (III) Nitrate‚ Barium Chloride
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Thermochemistry Lab Hypothesis We predict that two different physical changes (dissolving of a chemical substance in water) will produce energy changes; one exothermic and one endothermic. We predict that the temperature change will be affected by the change in system (open vs. closed) will be as follows: the temperature change in the closed system will be greater than that of the open system. Materials Refer to attached sheet Method Refer to attached sheet Observations Substance Added
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