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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

ATOM ECONOMY: Maleic anhydride, C4H2O3, can be produced by the oxidation of benzene (Study Question 141). It can also be produced from the oxidation of butene.

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  1. (a) What is the % atom economy for the synthesis of maleic anhydride from butene by this reaction?
  2. (b) If 1.02 kg of maleic anhydride is produced from exactly 1.00 kg of butene, what is the percent yield of the anhydride? What mass of the by-product H2O is also produced?

a)

Interpretation Introduction

Interpretation:

The % atom economy for the product in the given reaction has to be calculated.

Concept introduction:

  • Atom economy is one of the key parameter used to evaluate the efficiency of a reaction.

                %atomeconomy=molarmassofatomutilizedmolarmassofreactants×100%

  • Percent yield of reaction is the ratio of mass of actual yield to the mass of theoretical yield and multiplied with hundred.
  • 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.
  • Stoichiometric factor is a relationship between reactant and product which is obtained from the balanced chemical equation for a particular reaction.
Explanation

Atom economy is one of the key parameter used to evaluate the efficiency of a reaction. Atom economy percentage of a reaction can be calculated by using the following equation.

                %atomeconomy=molarmassofatomutilizedmolarmassofreactants×100%

The balanced equation for the synthesis of maleic anhydride from butene is,

In the above reaction reactant molecule contains 4C,8H,1O,and3O2 so the combined molar mass of the reactants is 152g/mol   

The product molecule maleicanhydrideC4H2O3 contains 4C </

(b)

Interpretation Introduction

Interpretation:

The product in the given reaction, percentage yield and the mass of H2O produced in the reaction also has to be calculated.

Concept introduction:

  • Atom economy is one of the key parameter used to evaluate the efficiency of a reaction.

                %atomeconomy=molarmassofatomutilizedmolarmassofreactants×100%

  • Percent yield of reaction is the ratio of mass of actual yield to the mass of theoretical yield and multiplied with hundred.
  • 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.
  • Stoichiometric factor is a relationship between reactant and product which is obtained from the balanced chemical equation for a particular reaction.

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