CHEM111AC‚ Experiment#9 - Ionic Reactions Discussion/Error Analysis In the first part of this experiment‚ the student was presented with 7 unique and unidentified bottles of solutions labeled A-G and was expected to be able to analyze the 7 solutions through trial and error and mixing them with one another. For solution A: mixing A + B formed a precipitate‚ A + C generated heat‚ A + D gave no reaction‚ A + E gave no reaction‚ A + F gave no reaction‚ A + G formed a precipitate. For solution B: mixing
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Prior to begin the experiment‚ preparation for some solutions is required to enhance the lab performance. The solutions needed are standardized potassium bromate‚ standardized sodium thiosulfate‚ and starch indicator. First‚ to prepare a starch indicator‚ pulverize 1g of soluble starch and add 15mL of water to make it as a paste-like substance. Dilute it with about 500mL of boiling water‚ and continue to heat until the mixture becomes clear. Cool it to room temperature and save it into a stoppered
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Alumina Yield in the Bayer Process; Past‚ Present and Prospects Edited by TMS (The Minerals‚ Metals & Materials Society)‚ 2007 ALUMINA YIELD IN THE BAYER PROCESS PAST‚ PRESENT AND PROSPECTS Roelof Den Hond1‚ Iwan Hiralal2‚ Ab Rijkeboer3 Alcor Technology‚ Clinckenburgh 10‚ 2343 JH Oegstgeest‚ The Netherlands 2 Hiracon‚ Prinses Irenelaan 2‚ 2273 DD Voorburg‚ The Netherlands 3 Rinalco‚ Helmlaan 16‚ 2244 AZ Wassenaar‚ The Netherlands 1 Keywords: hydrate‚ alumina‚ yield‚ liquor productivity
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of water? 6. Discuss which of the following substances will increase‚ decrease or have no effect on the hardness of water: Ca (OH)2‚ Mg(HCO3)2‚ MgSO4‚ Ca(HCO3)2‚ CaSO4‚ CaCl2‚ KCl‚ NH4Cl‚ NH4OH‚ NH4)2CO3‚ Na2SO4‚ BaCO3‚ NaCl‚ NaOH‚ Na2CO3‚ Na3PO4‚ NaAlO2‚ Na2[Na4(PO3)6]. 7. 0.5 g CaCO3 was dissolved in dil HCl and 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
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a) What other name(s) does this chemical go by? (i.e. synonyms) Other names for sodium bicarbonate are baking soda‚ sodium hydrogen carbonate‚ and carbonic acid sodium. (b) What is the type(s) of hazard associated with this chemical? (i.e. poisonous‚ biohazardous‚ ...) According to the Globally Harmonized System (GHS) of Classification and Labeling of Chemicals‚ sodium bicarbonate has not been categorized as hazardous. (c) What should you do if this chemical splashes in your eyes or is spilled
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of a precipitate. The Experiment and Observation: Weigh out your 1.0g of CaCl2-2H20 and put it into the 100mL beaker‚ add your 25mL of distilled water and stir to form the calcium chloride solution. Next‚ use stoichiometry to determine how much Na2CO3 and put it into a small paper cup. Then add the 25mL of distilled water to make the sodium carbonate solution. Mix the two solutions in the beaker and a precipitate of calcium carbonate will form instantly. Next‚ set up your filtration assembly. After
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WRITE YOUR NAME HERE:________________________________________________________ CHM 2046 (Gower sections) Exam 2 (Form Code A) Fall 2014 Instructions: On your scantron sheet enter and bubble in your name‚ UF ID number‚ and Form Code. Check your bubbling carefully – bubbling errors will not be negotiated. Turn in your scantron and retain your exam (with your answers circled). Potentially useful info : Kw = 1 x 10‒14 at 25°C pH = −log [H3O+] pH = pKa + log ([base] / [acid]) R =
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Lactic acidosis URL of this page: http://www.nlm.nih.gov/medlineplus/ency/article/000391.htm Lactic acidosis is when lactic acidlactic acid builds ups in the blood stream faster than it can be removed. Lactic acid is produced when oxygen levels in the body drop. Causes Causes The most common cause is intense exercise. However‚ it can also be caused by certain diseases‚ such as sepsis‚ respiratory failure‚ cardiac failure‚ AIDS‚ cancer‚ and kidney failure. Metformin‚ a common
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The Preparation of 1- Bromobutane Introduction... Aim : To prepare 1-Bromobutane. Background : The most common way of preparing alkyl halides‚ which are very useful intermediates in syntheses‚ is the replacement of the OH group of an alcohol by a halogen. This replacement is a nucleophilic substitution reaction‚ and alcohols do not undergo nucleophilic substitution reactions because hydroxide ison is strongly basic and a poor leaving group. However‚ alcohols readily undergo
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COLLIGATIVE PROPERTIES 1. Calculate the vapor pressure when 10.o mL glycerol (C3H8O3) is added to 500.0 mL water at 500C. At this temperature the vapor pressure of pure water is 92.5 torr and its density is 0.988 g/mL. Density of glycerol is 1.26 g/mL. 2. Calculate the boiling point and freezing point of the solution if 1.00 kg of ethylene glycol (C2H6O2) is added to a car radiator which contains 4450 g water. a. Kb of water = 0.512 oC/m at normal boiling point of 100oC b. Kf of water
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