Effects of Caffeine and Coffee on Cardiovascular Diseases Including High Blood Pressure‚ Arrythmias & High Cholesterol Reviewed by Meri Rafetto‚ RD‚ Theresa Grumet‚ RD‚ and Gerri French‚ RD‚ MS‚ CDE. ©2004 Teeccino Caffé‚ Inc. Heart disease is currently the number one cause of death for both men and women in the United States and in many other Western countries. Studies show that nine factors contribute to a significant percentage of heart attacks: smoking‚ abnormal lipoprotein ratios‚ high blood
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Design Lab #17: Reaction Rate - Calcium Carbonate & Hydrochloric acid Design D: Introduction: In this experiment calcium carbonate will be put into a flask and mixed with hydrochloric acid to produce calcium chloride‚ water and carbon dioxide. The formula for this reaction is: CaCO3(s) + 2HCl(aq) → CaCl2(aq) + CO2(g) + H2O(l) Purpose: The purpose of this experiment is to determine how the surface area of CaCO3(s) affects the rate of
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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 the experiment
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Permanent Water Hardness of Water Sources from PSHS-IRC by Indirect Titration Researchers Anna Marie S. Cabatbat Crystal Jill R. Mangsat Jan Michael Maturan Charlene Lou A. Nicer Arian Paul D. Norcio Submitted to the Faculty of the Philippine Science High School – Ilocos Region Campus in partial fulfillment of the requirements for Science and Technology Research 2 March 2013 ABSTRACT This study aimed to determine the permanent water hardness in terms of calcium carbonate
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well as all guidelines published for this class in the Syllabus and Academic Integrity Handouts.” Purpose- The purpose of this lab was to display to us a variety of different reactions using an eclectic of things in the chemistry lab: including magnesium‚ methanol‚ and fire. This was to make what we are doing on paper in class a real life circumstance. Analysis questions 1) A) Part A 2Mg+O2 à(delta/heat) 2MgO Part B 2CuCO2 à(delta) 2Cu+CO2+O2 Part C Zn+HCl à H2 Part D CuCl2+2NaOHà 2NaCl+
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Laura Romero ! 5.04H: Gas Stoichiometry Lab Worksheet Data and Observations: Present all relevant data in a data table below. Include an observations section for any observations that you made during the lab. (5 points) Data Table Mass of magnesium strip (grams) 0.032 g Volume of gas collected (mL) 30mL Barometric pressure (atm) 1.1 atm Room Temperature (°C) 22 °C Vapor pressure of the water (torr) 19.8 torr ! ! Calculations: ! 1. Write the balanced equation
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the limestone is thoroughly mixed with the stream of hot air and it therefore decomposes completely. 1.3 Decomposing carbonates Calcium is in group two‚ as is magnesium‚ so we can expect magnesium carbonate to have the same properties as calcium carbonate (they both decompose) The behaviour of carbonates Calcium carbonate (2) / Magnesium Carbonate (2) / Zinc Carbonate/ Copper Carbonate DECOMPOSE (Y) Potassium Carbonate(1) / Sodium Carbonate (1) DO NOT DECOMPOSE (N) From looking at these results
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then filtered the sample‚ which is a stock solution. Test for Magnesium 20ml of stock solution is taken in a flask and then 10mg of NH4Cl‚ 10 mg of NH4OH and excess disodium hydrogen phosphate solution is added. Then shaken and rubbed the wall of test tube. If white ppt is formed the Mg2+ is present. Mg2+ + NH4Cl + NH4OH + Na2HPO4 →Mg(NH4)PO4 ↓ + Na+ + H2O Magnesium Ammonium Phosphate Test for Aluminum: Taking 20ml of
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metal includes the chlorination of natural or synthetically produced rutile‚ TiO2. The obtained titanium tetrachloride is reduced to metallic titanium by the sodium reduction method known as the Hunter process‚ the magnesium reduction method known as the Hunter process‚ the magnesium reduction method known as the Kroll process and the calcium hydride reduction process used in Russia. In reduction processes of titanium tetrachloride‚ most of the residual chloride is removed by vacuum distillation
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Student Number Mark / 39 Chemistry Preliminary Course Final Examination • 2006 General Instructions • • • • • • • Reading time – 5 minutes Working time – 45 minutes Write using black or blue pen Draw diagrams using pencil Board-approved calculators may be used A Data Sheet and a Periodic Table are provided Write your Student Number at the top of this page Total Marks – 39 Part A – 10 marks • Attempt Questions 1 – 10 • Allow about 10 minutes for this part Part B – 29 marks • Attempt
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