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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

An Atka-Seltzer tablet contains exactly 100. mg of citric acid, H3C6H5O7, plus some sodium bicarbonate. What mass of sodium bicarbonate is required to consume 100. mg of citric acid by the following reaction?

H3C6H5O7(aq) + 3 NaHCO3(aq) → 3 H2O(l) + 3 CO2(g) + Na3C6H5O7(aq)

Interpretation Introduction

Interpretation:

Mass of sodium bicarbonate required to consume 100mg of citric acid in the given reaction has to be determined.

Concept introduction:

  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

Balanced chemical equation for the given reaction is,

  H3C6H5O7(aq)+3NaHCO3(aq)3H2O(l)+3CO2(g)+Na3C6H5O7(aq)

The amount (moles) of citric acid H3C6H5O available can be calculated by using the equation

  Numberofmole=GivenmassofthesubstanceMolarmass

  0.1gH3C6H5O×1molH3C6H5O192.124gH3C6H5O=0.000520molH3C6H5O

Using the stoichiometric factor calculating the amount of Carbon monoxide required based on the amount of NaHCO3 as follows,

  0

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