Determining the Limiting Reactant and Percent Yield in a Precipitation Reaction Objectives: Observe the reaction between solutions of sodium carbonate and calcium chloride. Determine which of the reactants is the limiting reactant and which is the excess reactant. Determine the theoretical mass of precipitate that should form. Compare the actual mass with the theoretical mass of precipitate and calculate the percent yield. Materials: Balance 0.70 M sodium carbonate solution‚ Na2CO3(aq)
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Precipitation Titration Mohr Method Experimental The chloride ion (Cl-) is an important anion found in solids and solutions. In this experiment‚ the amount of chloride ion in an unknown sample J (NaCl + KCl mixture) of water using the Mohr method is determined‚ which relies on the solubility differences of two anions and the titration endpoint of a precipitate. The net ionic reaction during the titration is as follows: Ag+ + Cl- → AgCl(s) The Ksp for AgCl is 1.8 x 10-10 and
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Australian Government Department of Immigration and Citizenship Skilled Occupation List (SOL) You must nominate an occupation from the SOL if you are applying for an Independent or Family Sponsored Points Tested visa or Temporary Graduate (subclass 485) – Graduate Work Stream. Applicants who require a skills assessment as part of their visa application must contact a relevant assessing authority directly to obtain a skill assessment. The assessing authority will provide all necessary applications
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Selective precipitation of the Barium Magnesium Group Chem 112-004 Abstract The purpose of this experiment is to separate and identify the cations of Ba+‚Sr2+‚Ca2+‚ Mg2+ and NH4+ using differences in solubility and confirming test to identify the unknown solution used in this experiment. In this experiment the methodology used by the group is to perform the tests for both the unknown and the cations (Ba+‚Sr2+‚Ca2+‚ Mg2+ and NH4+) using the known as a control for comparison and identification
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required for Calcium carbonate precipitation Abstract: Introduction: Different minerals precipitation by microbes is a common phenomenon‚ and carbonates are most common mineral formed. Many micro-organisms are having the ability in undergoing the process of mineralization‚ although different minerals have been precipitated by microbes which include carbonates‚ sulphates‚ silicates etc [1]. Amongst all these‚ carbonates are the most common minerals formed. Carbonate precipitation has been applied in several
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Good Morning‚ today I xxxx am here to talk to you about ‘’The Earth” Let me begin by a famous quote- “ The Earth provides enough to satisfy every man’s needs‚ but not every man’s greed.” ― Mahatma Gandhi The urgent message is “Save the Earth”. It’s a message that has been heard before and consistently being spread throughout the world. In this time that I have to talk to you‚ I want to show to you‚ how deep a mess we are in‚ with environmental crisis and how we can get out of it. It warns us
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become a very common problem globally and it is resulted from various dangerous chemical substances which spread in the air such as CO2. The dangerous chemical substances are the product of human daily activities such as factory activities which produce tires and other object using fuels and machines that trigger the air pollution. As a result of the air being polluted with chemical gases which are harmful to the environment it can also lead to having acid rain. The harmful chemicals that are realised
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Helix Company produces several products in its factory‚ including a karate robe. The company uses a standard cost system to assist in the control of costs. According to the standards that have been set for the robes‚ the factory should work 780 direct labour-hours each month and produce 2600 robes. The standard costs associated with this level of production are as follows: | | Total | Per Unit of Product | Direct materials | $ | 53248 | $ 20.48 | Direct labour | $ | 8320 |
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The calculations completed for this experiment include determining the amount of Na2CO3 needed to do a full reaction. This was calculated through stoichiometry calculations: Molar mass was first calculated for CaCl2*2H2O Ca = 40.078g Cl2 = 35.453g*2 = 70.906g 2H2 = 1.00794g*4 = 4.03176g 2O = 15.9994g*2 = 31.9988g 40.078g + 70.906g + 4.03176g + 31.9988g = 147.01456g or 147.0 g CaCl2 1g CaCl2 * 2H2O x (1 mol CaCl2 *2H2O/147g CaCl2 *2H2O) = 0.0068 mol of CaCl2*2H2O Molar mass was then
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Asia-Pacific region. Optus is proud to be a part of a premier Optus partner and our aim is to set the standard for retail telecommunications sales and customer service in Australia. (See Appendix 1) In order to become familiar with the recruit‚ select and induct process it is important to gain understanding on the reasons as to why we conduct these processes and why do they benefit us as an organisation. I will focus firstly on job analysis‚ which is the basic HR activity because it focuses attention
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