Question

THE COPPER CYCLE: A Series of Reactions . Transfer the balanced equations from the Procedure and circle the classification of each cquation Part A: Dissolution of Copper Balanced Equation Synthesis Decomposition Complete Oxidation Single Displacement Doble Displacement Part B: Formation of Copperill) hydroside Balanced Equation: Symthesis Decomposition Complete Oxidation Single Displacement Deuble Displacement Part C: Preparation of Copper(il) oside Balanced Equation Classification: Part D: Conversion of Copper(ll) oxide Balanced Equation Syndhesis Decomposition Complete Oxidation Single DisplacementDouble Displacement 06 06 Page 6 of8 Brookhaven College Chemistry-6 Part E: Recovering the Metallic Copper Balanced Equation: Synthesis Decomposition Complete Oxidation Single DisplacementDouble Displacement 2. If you started with 0.108g of copper wire and at the end of the experiment you recovared 0.09Pg of capper calculate the percent recovery to the correct number of significant figures

Answer 1

Cu(s) + 4HNO3(aq) ---> Cu(NO3)2(aq) +2NO2(g) + 2H2O(l)
This Is single displacement. Cu displaces hydrogen from HNO3

CU(NO3)2(aq) + 2NaOH(aq) ----> Cu(OH)2(s) + 2NaNO3(aq)
This is an example for double displacement ,since Cu displaces
Na from NaOH and Na displaces Cu from copper nitrate

Cu(OH)2(s) ----> CuO(s) + H2O(g)
This is decomposition reaction.because copper hydroxide
decomposes in to copper oxide and water

CUO(s) + H2SO4(aq) ----> CuSO4(aq) + H2O(l)
This is double displacement,since Cu displaces H from acid
and H displaces Cu from CuO

CUSO4(aq) + Zn ---> ZnSO4 + Cu(s)
This is single displacement .because Cu is getting displaced
by Zn as Zn is more reactive than Cu.
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mass of Cu= 0.108g
initial # moles of Cu= mass/molar mass= 0.108g/63.546 mol/g=0.001699 mole
mass Of Cu recovered = 0.099 G
# moles of Cu recovered= 0.099 g/63.546 =0.001557 mole

Percent recovery by moles = Number of mole recoverd/initial number of moles *100
91.64 %
percent recovery by mass= recovered mass/initial mass *100 = 0.099/0.108 x100
= 91.6%
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Thank you