Shinhye Lee Chem101 4.16 Specify what ions are present upon dissolving each of the following substances in water: a) MgI2(aq) -> Mg 2+ (aq) +2OH-(aq) b) Al(NO3)3(aq) -> Al3+(aq)+3NO3- (aq) c) HCLO4(aq) -> H+ (aq) + ClO4- (aq) d) NaCH3COO(aq) ->Na + (aq) + CH3COO-(aq) 4.22) In each reaction‚ the precipitate is in bold type. a) Ni(NO3)2 (aq) +2NaOH (aq) ->+2NaNO3(aq) + NiOH2 (s) b )No precipate‚ therefore‚ no reaction. c) Na2S(aq) + CuCH3COO (aq) -> CuS(s) + 2NaCH3COO
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______________________________________________________________________________________________________________________________ ABSTRACT This experiment aims to determine the influences of varying factors: temperature‚ concentration of reactants‚ and presence of catalysts‚ on the rate of a reaction. The rate law of a reaction was determined using the initial rates of method. Data gathered from six different runs of a reaction between thiosulfate and hydronium ion was used to plot a linear
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accomplished in one of several ways. An esterification occurs when an alcohol and a carboxylic acid are reacted in the presence of a mineral acid catalyst‚ such as sulfuric acid. Because these reactions result in an equilibrium mixture of both products and reactants‚ the reaction conditions must be
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In the data table above‚ the mass of penny‚ copper‚ and zinc was needed in order to determine the percent composition of copper and zinc. The mass of penny was taken on the scale in the beginning of the procedure before anything was done to the penny‚ and it was 2.51 grams. After the reaction with the hydrochloric acid and drying the copper‚ the mass is 0.35 grams. To get the mass of zinc‚ the mass of the penny was subtracted by the mass of copper. The mass of zinc is 2.16 grams. The penny is 14%
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nature of the reactants‚ temperature catalysts concentration • • rate of a chemical reaction is generally measured in terms of how much the concentration of a reactant decreases in a given period of time or product concentration increases for reactants‚ a negative sign is placed in front of the definition • • as time goes on‚ the rate of a reaction generally slows down because the concentration of the reactants decreases. at some time the reaction stops‚ either because the reactants run out or
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about the reactants Reaction of the acetylation of salicylic acid is following From the balanced reaction above‚ it can be seen that the stoichiometry between salicylic acid and acetic anhydride is 1: 1. In this experiment‚ 21.7mmol of salicylic acid was used to react 6.0mL of acetic anhydride and salicylic acid was limiting reagent. The expected amount of salicylic acid used: 21.7/1000*138.12=2.99g=3.0g The expected amount of acetic anhydride: 21.7/1000*102.09=2.215g=2.2g Reactants | Formula/MWt
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The physical data are most conveniently presented in tabular form‚ although in a preparative experiment you may put the amounts of reactants and products under the balanced equations for the reaction. Calculate the amounts of reactants (or compounds to be purified) in moles and grams or mL (as applicable). In a preparative experiment‚ calculate the limiting reagent and the theoretical yield of the product. Be sure to include your calculations for these values.
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An example of potential energy is A) a coiled spring. B) running water. C) tree branches blowing in the breeze. D) a moving elevator. E) electrical energy. Points Earned: 1.0/1.0 The correct answer is A. The definition of potential energy is an inactive type of energy that is stored for future use. All of these answers describe active energy‚ for example‚ running water is very active but can generate other types of energy. Which one of the following substances will float in gasoline
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Date of Experiment: September 10th‚ 2013 Organic Chemistry II – CHLB330 Name: Symone E. MoxeyLab Partner: Lynden Cooper Synthesis of Aspirin (Acetylsalicylic Acid) Abstract:- Aspirin (acetylsalicylic acid) is produced experimentally in the lab. The resulting percentage yield is 65.5%. The purity of the obtained product is tested using the melting point and Ferric Chloride Test (FCT). The aspirin was massed‚ and the melting point was determined. Based on the data collected‚ there was a total
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Hess’s law states that the amount of energy depends on the states of the reactants and the state of the products but not the steps that happen between. This allows us to calculate the values needed by piecing together the rest of the equation without having a direct calculation to convert to the final value needed. In the first
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