measurement‚ acid-base titration‚ chloride-ion electrode analysis‚ and flame testing. The sample had a greater concentration of chloride ions‚ no measurable CaCo3 ‚ and lower than standard moisture content. It was contaminated with KCl and likely HCl ionic solids. Introduction Soil is a vital component of any environmental network. It provides the basis for life for any environment. There are many factors that determine what life comes from soil such as texture of the soil‚ topsoil composition
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C6H5COONa(aq) + HCl(aq) C6H5COOH(s) + NaCl(aq) Upon completion of this experiment students will gain experience using common extraction techniques such as vacuum filtration‚ as well as familiarity with common calculations used in chemistry‚ such as mass measurements and percent yield. Description of Procedure: 2.00 g of sodium benzoate was dissolved in 10.0 mL of H2O. 7.0 mL of HCl was added to the solution and a pH of 2 (similar to stomach acid) was reached. Upon addition of the HCl‚ a white
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Strong or Weak Acid/Base pH 0.1 M HCl (aq) 0.1 M HC2H3O2 (aq) 0.1 M NaOH (aq) 0.1 M NH3 (aq) Question 1. Both acids above have the same concentration‚ 0.1 M‚ but they exhibit different pH value. Explain. Question 2. Both bases above have the same concentration‚ 0.1 M‚ but pH of NH3(aq) is lower than that of NaOH. Explain. 7 III. a) Observation of HCl/NaOH product. b) Identity of the product: c) Write the reaction occurred between HCl and NaOH. __________________________________________________________________________
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Discussion The acid neutralising capacity (ANC) of 3 brands of calcium carbonate (CaCO3) tablets was determined by reacting the tablets in excess standardized hydrochloric acid (HCl) and then back-titrating with a standardized sodium hydroxide (NaOH) solution. Back titration was required for two reasons. Firstly‚ CaCO3 tablets are poorly water-soluble but dissolve rapidly in acid. Secondly‚ CaCO3 is a weak base so it is difficult to determine the end point of the reaction if titrated directly. Assuming
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2 -250mL beakers 10mL grad cylinder 0.2M FeCl3 0.2M KSCN 0.2M KCl 0.2M Fe(NO3)3 6.0M NaOH CoCl26H2O 6.0M HCl water 0.1M K2CrO4 0.1M K2Cr2O7 1M NaOH 1M HCl 0.1M Ba(NO3)2 Procedure PART I 1. Use a 10mL graduated cylinder to measure 1mL of 0.2M FeCl3 and pour it into a 250mL beaker. Using another 10mL graduated cylinder‚ measure 1mL of 0.2M KSCN
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How to Make Homemade Pesticide Things You’ll Need * Spray bottle * Dedicated blender or food processor * Protective gloves Read more: How to Make Homemade Pesticide | eHow.com http://www.ehow.com/how_2043716_make-homemade-pesticide.html#ixzz2L1VJ1Ivu Instructions 1. * 1 Mix homemade garden sprays using water and plants (or dried powders) from the garden such as hot peppers‚ onions and garlic. Add a drop of dish detergent to help the solution stick and store in a
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wonderland with almost every natural resource known to the earth. Here‚ oil has replaced gold as the most hunted after resource. Other important mineral findings in southeastern Alaska include copper‚ silver‚ mercury‚ tin‚ platinum‚ coal‚ iron ore‚ borax‚ chromite‚ antimony‚ tungsten‚ nickel‚ molybdenum‚ sand‚ gravel‚ and limestone. It is estimated that Alaska has about 120 billion tons of coal. Coal is found mostly throughout much of Alaska with giant deposits in the Matanuska‚ Nenana‚ and Bering
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A Report On “working capital management in hcl infosystems limited” By (Submitted in partial fulfillment of the requirements of MBA program at ICFAI Business School‚ Chandigarh) ACKOWLEDGEMENT Achievement is finding out what you would be then doing‚ what you have to do. The higher the summit‚ the harder is the climb. The goal was fixed and we began with a determined resolved and put in ceaseless sustained hard work. Greater challenge
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KH2PO4 (acid) and 20.42g of K2HPO4 (base) were weighed out for use. Data 25mL of DIH2O in 100mL beaker had pH = 7.40. After one drop of 0.50M HCl was added to the beaker‚ pH dropped to 3.08‚ and the change in pH was -4.32. After one drop of 0.50M NaOH‚ the pH jumped to 10.3‚ and the change was 2.9. pH of 25mL of created buffer solution = 6.15 Volume of HCl Added to 25mL of Buffer Solution | pH | Concentration of Acid After Addition | Concentration of Conjugate Base After Addition | 0mL | 6.15
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up. By adding 100mL 6M HCl to 200mL deionized water‚ 300mL of 2M HCl solution was prepared. Then 150mL 2M NaOH solution was prepared by adding 100mL 3M NaOH to 50mL deionized water. Finally‚ the LabQuest was connected to the temperature probe‚ and set up to collect data every 15 seconds‚ the duration was set to be 180 seconds. In part B‚ three reactions were performed. In reaction 1‚ two Styrofoam cups were stacked together and placed in a 400mL beaker. Then 50mL of 2M HCl solution was added to the
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