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Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074

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BuyFindarrow_forward

Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074
Textbook Problem

The deep blue compound Cu(NH3)4S04 is made by the reaction of copper(II) sulfate and ammonia

CuSO4(aq) + 4 NH3(aq) → Cu(NH3)4SO4(aq)

  1. (a) If you use 10.0 g of CuSO4 and excess NH3, what is the theoretical yield of Cu(NH3)4SO4?
  2. (b) If you isolate 12.6 g of Cu(NH3)4SO4, what is the percent yield of Cu(NH3)4SO4?

a)

Interpretation Introduction

Interpretation:

Theoretical yield of Cu(NH3)4SO4 in the given condition has to be determined.

Concept introduction:

  • Limiting reagent: limiting reagent is a reactant, which consumes completely in the chemical reaction. The quantity of the product depends on this limiting reagent, it can be determined with the help of balanced chemical equation for the reaction.
  • The number of moles of any substance can be determined  using the equation,                    

              Numberofmole=GivenmassofthesubstanceMolarmass

  • The molar mass of an element or compound is the mass in grams of 1 mole of that substance, and it is expressed in the unit of grams per mol (g/mol).   
  • For chemical reaction balanced chemical reaction equation written in accordance with the Law of conservation of mass.
  • Law of conservation of mass states that for a reaction total mass of the reactant and product must be equal.
  • Theoretical yield: It is the maximum mass of product that can be obtained from a chemical reaction.
  • A measure of the extent of the reaction in terms of actual / the theoretical yield is referred as percentage yield.

     Percentageyield=actualyieldtheoretical yield×100 

Explanation

Balanced chemical equation for the given reaction is,

CuSO4(aq)+4NH3(aq)Cu(NH3)4SO4(aq)

To find the mass of product formed in the reaction, the amount of each reactant involved in the given reaction should be determined.

 Therefore,

                   AmountofCuSO4=10gCuSO4×1molCuSO4159.609g=0.06265molCuSO4

The mass of Cu(NH3)4SO4 expected based on CuSO4 reactant is,

0

b)

Interpretation Introduction

Interpretation:

Percent yield of Cu(NH3)4SO4 in the given condition has to be determined.

Concept introduction:

  • Limiting reagent: limiting reagent is a reactant, which consumes completely in the chemical reaction. The quantity of the product depends on this limiting reagent, it can be determined with the help of balanced chemical equation for the reaction.
  • The number of moles of any substance can be determined  using the equation,                    

              Numberofmole=GivenmassofthesubstanceMolarmass

  • The molar mass of an element or compound is the mass in grams of 1 mole of that substance, and it is expressed in the unit of grams per mol (g/mol).   
  • For chemical reaction balanced chemical reaction equation written in accordance with the Law of conservation of mass.
  • Law of conservation of mass states that for a reaction total mass of the reactant and product must be equal.
  • Theoretical yield: It is the maximum mass of product that can be obtained from a chemical reaction
  • A measure of the extent of the reaction in terms of actual / the theoretical yield is referred as percentage yield.

     Percentageyield=actualyieldtheoretical yield×100 

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