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Aluminum metal reacts with aqueous cobalt(II) sulfate to form aqueous aluminum sulfate and copper metal. What is the stoichiometric coefficient for aluminum when the chemical equation is balanced using the lowest, whole-number stoichiometric coefficients?

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Elin Hessel
Elin HesselLv2
28 Mar 2019

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Related questions

Using the activity series (Table 4.5), write balanced chemical equations for the following reactions. If no reaction occurs, write NR. (a) Iron metal is added to a solution of copper(II) nitrate, (b) zinc metal is added to a solution of magnesium sulfate, (c) hydrobromic acid is added to tin metal, (d) hydrogen gas is bubbled through an aqueous solution of nickel(II) chloride, (e) aluminum metal is added to a solution of cobalt(II) sulfate.


Replacement Reaction Stoichiometry Pre-laboratory Question

Write the balanced equation for the reaction of aluminum with copper(II) sulfate solution.

What is the mole ratio of the reactants to one another and what is the mole ratio of Al metal to Cu Metal?

How many moles of aluminum will be required to produce 0.45 moles of copper metal?

How many grams of aluminum will be required to produce 4.5 g of copper metal?

Based on the information in the procedure, why does the copper metal have to be completely dry before the yield is calculated?


Laboratory Questions

Describe the appearance of the copper(II) sulfate solution and the aluminum foil before the reaction starts.

Describe your observations of the solution during the reaction.

Describe the appearance of the solution and any solids after the reaction.

Describe the appearance of the solid after it is dried.

Was all of the copper(II) sulfate reacted in this lab? Explain your answer both with observations and calculations.

Identify the excess and limiting reactants.

Identify two aqueous substances that were washed away from the final solid.


If the solids were not washed before drying, how would this change the copper metal yield?

If the copper is not completely dried, how would this change the yield of copper metal?

Explain why the percent yield was not 100%. What are some sources of error?

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