Observing a Limiting Reactant An experiment was carried out to predict the limiting reactant in a chemical reaction between Magnesium and Hydrochloric acid‚ using the mole concept. Limiting Reactant: It is the reactant that will deplete or will be used up first during a chemical reaction. Limiting reactant also determine how long the reaction will last for. Balanced Equation: Mg + 2HCl = MgCl2 + H2 The balanced equation is needed to determine the mole ratio between the two reactants. From the
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Tara Keller Finding the Ratio of Moles of Reactants in a Chemical Reaction 9/6/13 Introduction The purposes of this lab are to measure the temperature change of the reaction between solutions of sodium hydroxide and phosphoric acid‚ calculate the enthalpy‚ H‚ of neutralization of phosphoric acid‚ and compare the calculated enthalpy neutralization with the accepted value. Theory Calorimetry is the measurement of change of heat in a reaction. A calorimeter is a tool to measure the amount of
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Experiment #8: Limiting Reactant Abstract In chemical reactions‚ the significance of knowing the limiting reactant is high. In order to increase the percent yield of product‚ increasing the limiting reactant‚ possibly‚ is the most effective. In this experiment we were able to calculate limiting reactants from the reaction of CaCl2. 2H2O + K2C2O4.H2O(aq). As a group‚ we obtained our salt mixture of calcium chloride and potassium oxalate‚ and weighed the mixture. We were able to make an aqueous
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Mole Ratios Lab October 10‚ 2013 Mrs. Oliver Noah Kent AP Chemistry Block 3/4 Laboratory #4: Mole Ratios I. Hypothesis: If copper wire is placed in an aqueous solution with silver nitrate‚ then silver crystals will grow on the wire surface and the solution will gradually take on the color of Copper (II) ions. The relative quantities of reactants and products in this chemical reaction can be determined by measuring the mass of copper wire consumed in the reaction and the mass of silver crystals
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Reactions Objective In this lab we took Fe(NO3)3 and NaOH and mixed 7 different mole ratios in graduated cylinders to determine what the mole ratio is. We also did the same thing with solutions of CuCl2 and Na3PO4. We determine the mole ratios by graphing the volume of reactant #1 vs. volume of precipitate for each reaction. Data Part 1.) Cylinder 1 2 3 4 5 6 7 Fe(NO3)3‚ 0.1 M‚ ml 5 10 12 15 17 20 24 NaOH‚ 0.1 M‚ ml 55 50 48 45 43 40 36 Fe:OH mole ratio 1:11 1:5 1:4 1:3
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Continuous Variations to Determine the Mole Ratio between Reactants Abstract: The purpose of this lab was to find the molar ratio of NaClO and an unknown substance labeled solution “B”. Using the method of continuous variation the ratio of the two solutions were changed but kept equal to 50 mL. The reaction was an exothermic oxidation-reduction and the temperature change was measured to determine which ratio of NaClO to solution “B” was optimal. The ratio with the highest temperature change was
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from grams to moles using molar mass. To get moles from grams of potassium chlorate (KClO3): [molar mass = 122.55 g/mol] 138.6 g KClO3 X ( 1 mol / 122.55 g ) = 1.131 mol KClO3 3. Determine the limiting reagent [if necessary] (Use mole ratios to figure out.) * Not necessary to determine because there is only 1 reactant in this decomposition reaction. 4. Use ratios to find the moles of the reactant or product you
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Experiment 8 Chemical Kinetics Abstract This experiment was done to determine the effects of the nature of the reactants‚ concentration‚ temperature‚ surface area and catalyst on the rate of chemical reactions. The nature of the reactants implies a difference if the reactants are aqueous or organic‚ acidic or basic or if they occur in the same phase or not. Acid-base reactions‚ formation of salts‚ and exchange of ions are fast reactions while reactions in which large molecules are formed
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Mole Ratio of a Chemical Reaction: Copper & Silver Nitrate Lab #4 OBJECTIVE In this experiment‚ you will determine the number of moles of reactants and products present in the reaction of copper and silver nitrate‚ and calculate their mole-to-mole ratio. The mole-to-mole ratio relating to the disappearance of copper and the formation of silver metal will be used to write the balanced equation for the reaction. The reaction of copper metal with silver nitrate solution is a single
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Lab 4-B Purpose The purpose of this lab is to test these solutions and see what type of reaction occurs and see if a precipitate or gas forms between any of these reactions. Research 1. Table A Reactants in Aqueous Solutions Predictions (1) MgCl₂(aq) + 2NaOH(aq) Mg(OH)₂(s) + 2NaCl(aq) (2) FeCl₃(aq) + 3NaOH(aq) Fe(OH)₃(s) + 3NaCl(aq) (3) 2KCl(aq) + Na₂SO₄(aq) K₂SO₄(s) + 2NaCl(aq) (4) CaCl₂(aq) + 2AgNO₃(aq) Ca(NO₃)₂(s) + Ag₂Cl(aq) (5) CuSO₄(aq) + Na₃PO₄(aq) Cu₃PO₄(aq) + Na₂SO₄(s) 2. Table B
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