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Introductory Chemistry: A Foundati...

9th Edition
Steven S. Zumdahl + 1 other
ISBN: 9781337399425

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BuyFindarrow_forward

Introductory Chemistry: A Foundati...

9th Edition
Steven S. Zumdahl + 1 other
ISBN: 9781337399425
Textbook Problem
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Consider the equation: 2 A + B 5C . If 10.0 g of A reacts with 5.00 g of B. how is the limiting reactant determined? Choose the best answer and explain.

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  • Choose the reactant with the smallest coefficient in the balanced chemical equation. So in this case, the limiting reactant is B.
  • Choose the reactant with the smallest mass given. So in this case, the limiting reactant is
  • The mass of each reactant must be converted to moles and then compared to the ratios in the balanced chemical equation. So in this case, the limiting reactant cannot be determined without the molar masses of A and B.
  • The mass of each reactant must he converted to moles first. The reactant with the fewest moles present is the limiting reactant. So in this case, the limiting reactant cannot be determined without the molar masses of A and B.
  • The mass of each reactant must be divided by their coefficients in the balanced chemical equation, and the smallest number present is the limiting reactant. So in this case, there is no limiting reactant because A and B arc used up perfectly.
  • Interpretation Introduction

    Interpretation:

    From the multiple answers given, how the limiting reactant determined is should be chosen.

    Concept Introduction:

    To determine how much product can be formed from a given mixture of reactants, we have to look for the reactant that is limiting; the one that runs out first and thus limits the amount of product that can form. The reactant that runs out first limiting the amount of products form is called the limiting reactant or limiting reagent. In order to determine limiting reactant, first the known masses of reactants should be converted into moles. Then according to the balanced equation, limiting reactant should be determined.

    Explanation

    Reason for correct option: The coefficients in the balanced chemical equation enable us to determine how much product we can get from a given quantity of reactants. The coefficients of the balanced equation give us the relative numbers of molecule not masses...

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