The balanced chemical equation represents the molar ratio in which various substances react with each other. \text{Number of moles Aluminium needed = } 0.3\ moles. (d)How many grams of aluminum will be required to produce {eq}4.5 g{/eq} of copper metal? Magnesium is more reactive than copper, reduces copper (II) ion from Copper (II) Sulfate to create copper metal and forms a water soluble magnesium sulfate and thus completing the Copper Cycle. {/eq}. This prevents the reaction from proceeding to completion. Ans: If the solids are not washed with water to remove the sodium chloride and Aluminium sulfate, then the mass of copper would wrongly over-estimated. (c) Describe the appearance of the solution and any solids after the reaction. An orange-brown solid at the bottom of the test tube. 22.1g Al X 1 mol Al/26.98g Al X 1 mol Cu/1 mol Al X 63.55g Cu/1 mol Cu = 78.1g Cu ; Subtract the filter paper from the dry residue/product in the data table below. All other trademarks and copyrights are the property of their respective owners. (c)Describe the appearance of the solution and any solids after the reaction. 0.45\text{ g of Cu is precipitated by } \frac{54\times0.45}{190.62}\text{ g of Al}\\ © copyright 2003-2020 Study.com. Ans: The Copper sulfate solution is light blue in color while the Aluminium foil is shiny at the start of the reaction. What are some sources of error? {/eq}. {/eq}){eq}_3 3 CuSO 4 (aq) + 2 Al(s) Al 2 (SO 4) 3 (aq) + 3 Cu(s) This reaction is an example of a redox reaction: where aluminum is oxidized and copper is reduced. Ans:This answer is subject to the initial amounts of reactants taken. 190.62\text{ g of Cu is precipitated by } 54\text{ g of Al}\\ (j)Explain why the percent yield was not {eq}100\%{/eq}. Limiting Reactants & Calculating Excess Reactants, Mole-to-Mole Ratios and Calculations of a Chemical Equation, The Kinetic Molecular Theory: Properties of Gases, Collision Theory: Definition & Significance, Limiting Reactant: Definition, Formula & Examples, Calculating Reaction Yield and Percentage Yield from a Limiting Reactant, Dalton's Law of Partial Pressures: Calculating Partial & Total Pressures, The Activity Series: Predicting Products of Single Displacement Reactions, The pH Scale: Calculating the pH of a Solution, Rate of a Chemical Reaction: Modifying Factors, Boyle's Law: Gas Pressure and Volume Relationship, Gay-Lussac's Law: Gas Pressure and Temperature Relationship, Heat of Fusion & Heat of Vaporization: Definitions & Equations, Calculating Molarity and Molality Concentration, Empirical Formula: Definition, Steps & Examples, Lewis Structures: Single, Double & Triple Bonds, CLEP Natural Sciences: Study Guide & Test Prep, Middle School Life Science: Tutoring Solution, Holt McDougal Modern Chemistry: Online Textbook Help, Praxis Chemistry (5245): Practice & Study Guide, College Chemistry: Homework Help Resource, CSET Science Subtest II Chemistry (218): Practice & Study Guide, ISEB Common Entrance Exam at 13+ Geography: Study Guide & Test Prep, Holt Science Spectrum - Physical Science with Earth and Space Science: Online Textbook Help, Biological and Biomedical (b)Describe your observations of the solution during the reaction. (h)If the solids were not washed before drying, how would this change the copper metal yield? The molar ratio is the basis of all stoichiometric Mass to Mass calculations. (e)Based on the information in the procedure, why does the copper metal have to be completely dry before the yield is calculated? The colour of the solution will change from blue to transparent and copper will be observed as a layer on the Aluminium piece. Copper and Aluminum Lab. (a) Describe the appearance of the copper(II) sulfate solution and the aluminum foil before the reaction starts. (f) Identify the excess and limiting reactants. (b) Describe your observations of the solution during the reaction. Explain your answer both with observations and calculations. There are two (2) moles of Al, three (3) moles of Cu, 3 moles of S, and 12 moles of O on both the reactants and products side. All rights reserved. Earn Transferable Credit & Get your Degree, Get access to this video and our entire Q&A library. (a) Write the balanced equation for the reaction of aluminum with copper(II) sulfate solution. (e) Based on the information in the procedure, why does the copper metal have to be completely dry before the yield is calculated? CuSO4 + Mg → Cu + MgSO4 Products: Copper: element that we started with. Predict the products: a. aluminum(s) +... Write the balanced equation and the reaction type... A normal salt is formed when all the hydrogen... What is the balanced molecular formula and state... Will or will not occur this reaction? Ans: {eq}2Al + 3CuSO_4\rightarrow Al_2(SO_4)3 + 3Cu (d) How many grams of aluminum will be required to produce {eq}4.5 g{/eq} of copper metal? Ans: Here again the adhering water would lead us to over-estimate the mass of copper obtained. Ans: At the end of the reaction the solution is colorless, a reddish-brown powdered mass of Copper is precipitated. {/eq}(SO{eq}_4 {/eq}, and copper metal (Cu). {/eq}. When copper (II) sulfate and aluminum are allowed to react, aluminum sulfate and copper are formed. Services, Working Scholars® Bringing Tuition-Free College to the Community. The Displacement reaction between a metal and another salt is subject to the condition that the metal in the salt is positioned lower in the electrochemical series compared to the metal which is displacing it. Also, the total charge on both sides of the reaction is zero (0). Replacement Reaction Stoichiometry Pre-laboratory Question. Our experts can answer your tough homework and study questions. (f)Identify the excess and limiting reactants. The reaction between aluminum metal and copper(II) sulfate is an example of a single-displacement reaction. (j) Explain why the percent yield was not {eq}100\% Ans: The deposition of Copper on the Aluminium foil prevents exposure of the foil to the copper sulfate. All rights reserved. Services, Single-Displacement Reaction: Definition & Examples, Working Scholars® Bringing Tuition-Free College to the Community. What kind of reaction is this? In this reaction, 2 moles of Aluminium reacts with 3 moles of Copper sulfate. © copyright 2003-2020 Study.com. Ans: The idea here is to find out the number of moles of Aluminium and Copper sulfate taken at the beginning of the reaction. So we end up with a solution of copper (II) chloride, sone precipitated copper and precipitated aluminium sulfate. I hope that I solved your query. Laboratory Questions (a) Describe the appearance of the copper (II) sulfate solution and the aluminum foil before the reaction starts.