reaction‚ then we can prove if the Law of Conservation of Mass is true. * Materials: * Goggles * 25mL graduated cylinder * 2 resealable bags * Scale * Antacid tablet * Scoopula * CaCl2 ‚ Calcium Chloride * NaHCO3 ‚ Sodium Hydrogen Carbonate * Universal Indicator * Procedure Part A 1. Measure 25mL of water and put into a resealable bag. Flatten air out of the bag and seal it. Record the mass in Table 1. 2. Record the mass of the antacid tablet
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AgNO3 Solid formed/ turned brown K AgNO3 and NH3 No change L NH3 and CuSO4 Tiny particles/ blue Questions Use what you learned in this lab to answer the following questions: A. Suppose a household product label says it contains sodium hydrogen carbonate (sodium bicarbonate). How would you test this material for the presence of sodium bicarbonate? I would add HCl and it would bubble if it contained Sodium Bicarbonate B. You know what color phenolphthalein and bromthymol blue turn when testing an
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objects known as “scum”. Calcium ions are typically the most common contributing factor for water hardness so this experiment uses CaCO3 (Calcium Carbonate) to analyze the hardness of an unknown sample. A scale of water hardness identifies “soft” water with a value less than 60 ppm (parts per million) and “hard” water with a value more than 200 ppm. 3 mL of ammonia/ammonium chloride buffer (pH 10) is added to the mixture prior to the titration to capture the calcium metal ions so the indicator
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Sp N ec e ifi w ca tio n Centre Number 71 Candidate Number General Certificate of Secondary Education 2013–2014 Science: Single Award Foundation Tier GSS21 Unit 2 (Chemistry) [GSS21] THURSDAY 15 MAY 2014‚ MORNING TIME 1 hour. INSTRUCTIONS TO CANDIDATES Write your Centre Number and Candidate Number in the spaces provided at the top of this page. Write your answers in the spaces provided in this question paper. Answer all eleven questions. For Examiner’s use only Question Marks Number 1
Free Periodic table Chemical element Sodium bicarbonate
diluted to 500 ml. 50 ml of this required 40 ml EDTA. 100 ml hard water required 50 ml EDTA and after boiling 50 ml consumed 20 ml EDTA. Calculate temporary hardness. 8. Why is calgon conditioning better than phosphate conditioning? 9. Compare carbonate conditioning and phosphate conditioning of boiler water with respect to the principles involved‚ advantages and limitations. 10. Establish the relation between mg/l and ppm. 11. Is boiled water 100% safe for drinking. Why? 12. Ca(HCO3)2 causes
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Investigating How Concentration of Acid Affects the Reaction Between Calcium Carbonate and Hydrochloric Acid Introduction ============ According to the collision theory temperature‚ concentration‚ surface area and catalysts all affect rates of reaction as shown in the diagrams below. Increasing any of these should increase the number of collisions and so increase the reaction rate up to an optimum point. Increasing the temperature causes the particles to collide with more
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“women of strength”. The seminar was held by Nestle Nesvita in the auditorium of Jinnah university for women on 25 march 2014. The purpose of the seminar to aware women about their bones‚ their vigor and health. Seminar acquainted the audience with Calcium‚ Calci- Lock and also gave the information about Osteoporosis disease. The host of the seminar asked different questions to audience and endowing them with some gifts. She also involved audience with herself and arranged an activity for audience in
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in vitamin C. Major sources of vitamin C are citric fruits such as orange and grapefruit‚ but it’s also found in sweet fruits like papaya‚ mango‚ strawberries‚ and cantaloupes. Explain the function of the following: Zinc‚ Iodine‚ Iron‚ Magnesium‚ Calcium and Chromium. Zinc is an essential mineral found in cells throughout the body. It plays an important role in the immune system‚ wound healing‚ and the breakdown of carbohydrates and lipids. Its main functions are the DNA synthesis‚ metabolism of
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Unit 5 |1. |Rising air expands and cools; sinking air is compressed and warms. Typically‚ the size of the temperature change is: | | |A. | | |5oF/1000 ft change in elevation going up‚ and 3oF/1000 ft coming down | | |
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vitamins and minerals that your body needs to function daily Calcium: most important‚ helps build and maintain strong bones. Also vital for nerve function‚ muscle contraction‚ and blood clotting. Protein: Important for a number of bodily functions. Vitamin A: Maintains normal vision and skin. Vitamin B-12: Essential for the growth and health of the nervous system and is involved in blood formation. Vitamin D: Promotes the absorption of calcium and phosphorus‚ and influences bone mineralization‚ the
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