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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

Disulfur dichloride, S2Cl2, is used to vulcanize rubber. It can be made by treating molten sulfur with gaseous chlorine:

S8(l) + 4 Cl2(g) → 4 S2Cl3(l)

Starting with a mixture of 32.0 g of sulfur and 71.0 g of Cl2,

  1. (a) Which is the limiting reactant?
  2. (b) What is the theoretical yield of S2Cl2?
  3. (c) What mass of the excess reactant remains when the reaction is completed?

(a)

Interpretation Introduction

Interpretation:

The limiting reactant, theoretical yield of product and the mass of the excess reactant remains when the reaction is completed should be determined for the given reaction.

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
Explanation

Balanced chemical equation for the given reaction is,

  S8(l)+4Cl2(g)4S2Cl2(l)

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

Therefore,

  AmountofS8=32gS8×1molS8256g=0.125molS8AmountofCl2=71.0gCl2×1molCl271.0gCl2=1.0molCl2

The mass of S2Cl2 expected based on each reactant is,

  0

(b)

Interpretation Introduction

Interpretation:

The theoretical yield of product should be determined for the given reaction.

Concept introduction:

Theoretical yield: It is the maximum mass of product that can be obtained from a chemical reaction

(c)

Interpretation Introduction

Interpretation:

Mass of the excess reactant remains when the reaction is completed should be determined for the given reaction.

Concept introduction:

The number of moles of any substance can be determined using the equation,

  Numberofmole=GivenmassofthesubstanceMolarmass

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