BuyFindarrow_forward

Chemistry & Chemical Reactivity

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

Solutions

Chapter
Section
BuyFindarrow_forward

Chemistry & Chemical Reactivity

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

An unknown solid acid is either citric acid or tartaric acid. To determine which acid you have, you titrate a sample of the solid with aqueous NaOH and from this determine the molar mass of the unknown acid. The appropriate equations are as follows.

Citric acid:

H3C6H5O7(aq) + 3 NaOH(aq) → 3 H2O(l) + Na3C6H5O7(aq)

Tartaric acid:

H2C4H4O6(aq)+ 2 NaOH(aq) → 2 H2O(l) + Na2C4H4O6(aq)

A 0.956-g sample requires 29.1 mL of 0.513 M NaOH to consume the acid completely. What is The unknown acid?

Interpretation Introduction

Interpretation:

The molar mass of acid used in the given reaction has to be determined and the acid is whether is citric or tartaric acid has to be identified.

Concept introduction:

  • 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.
  • Concentrationofsubstance=Amountof substancevolumeofthesubstance
  • Amountof substance=Concentrationofsubstance×volumeofthesubstance
  • Titration is a method to determine the concentration of a substance in solution by adding a solution of known volume and concentration until the reaction is completed.
Explanation

Balanced chemical equation for the given reaction involving citric acid is,

  H3C6H5O7(aq)+3NaOH(aq)3H2O(l)+Na3C6H5O7(aq)

From the balanced chemical equation it is clear that acid (H3C6H5O7H2A) and base (NaOH) react in a 1:3ratio.

The amount (moles) of NaOH used in the titration can be calculated from its volume and concentration as follows,

  AmountofNaOH = CNaOH×VNaOH =0.513molL×0.0291L =0.0149molNaOH

Using the stoichiometric factor the amount of citric acid  H3C6H5O7 can be calculated.

  0

Still sussing out bartleby?

Check out a sample textbook solution.

See a sample solution

The Solution to Your Study Problems

Bartleby provides explanations to thousands of textbook problems written by our experts, many with advanced degrees!

Get Started
Sect-4.8 P-4.11CYUSect-4.8 P-4.12CYUSect-4.8 P-4.13CYUSect-4.9 P-4.14CYUSect-4.9 P-1.1ACPSect-4.9 P-2.1ACPSect-4.9 P-3.1ACPSect-4.9 P-4.1ACPSect-4.9 P-4.2ACPSect-4.9 P-4.3ACPSect-4.9 P-4.4ACPCh-4 P-1PSCh-4 P-2PSCh-4 P-3PSCh-4 P-4PSCh-4 P-5PSCh-4 P-6PSCh-4 P-7PSCh-4 P-8PSCh-4 P-9PSCh-4 P-10PSCh-4 P-11PSCh-4 P-12PSCh-4 P-13PSCh-4 P-14PSCh-4 P-15PSCh-4 P-16PSCh-4 P-17PSCh-4 P-18PSCh-4 P-19PSCh-4 P-20PSCh-4 P-21PSCh-4 P-22PSCh-4 P-23PSCh-4 P-24PSCh-4 P-25PSCh-4 P-26PSCh-4 P-27PSCh-4 P-28PSCh-4 P-29PSCh-4 P-30PSCh-4 P-31PSCh-4 P-32PSCh-4 P-33PSCh-4 P-34PSCh-4 P-35PSCh-4 P-36PSCh-4 P-37PSCh-4 P-38PSCh-4 P-39PSCh-4 P-40PSCh-4 P-41PSCh-4 P-42PSCh-4 P-43PSCh-4 P-44PSCh-4 P-45PSCh-4 P-46PSCh-4 P-47PSCh-4 P-48PSCh-4 P-49PSCh-4 P-50PSCh-4 P-51PSCh-4 P-52PSCh-4 P-53PSCh-4 P-54PSCh-4 P-55PSCh-4 P-56PSCh-4 P-57PSCh-4 P-58PSCh-4 P-59PSCh-4 P-60PSCh-4 P-61PSCh-4 P-62PSCh-4 P-63PSCh-4 P-64PSCh-4 P-65PSCh-4 P-66PSCh-4 P-67PSCh-4 P-68PSCh-4 P-69PSCh-4 P-70PSCh-4 P-71PSCh-4 P-72PSCh-4 P-73PSCh-4 P-74PSCh-4 P-75PSCh-4 P-76PSCh-4 P-77PSCh-4 P-79GQCh-4 P-80GQCh-4 P-81GQCh-4 P-82GQCh-4 P-83GQCh-4 P-84GQCh-4 P-85GQCh-4 P-86GQCh-4 P-87GQCh-4 P-88GQCh-4 P-89GQCh-4 P-90GQCh-4 P-91GQCh-4 P-92GQCh-4 P-93GQCh-4 P-94GQCh-4 P-95GQCh-4 P-96GQCh-4 P-97GQCh-4 P-98GQCh-4 P-99GQCh-4 P-100GQCh-4 P-101GQCh-4 P-102GQCh-4 P-103GQCh-4 P-104GQCh-4 P-105GQCh-4 P-106GQCh-4 P-107GQCh-4 P-108GQCh-4 P-109GQCh-4 P-110GQCh-4 P-111GQCh-4 P-112GQCh-4 P-113GQCh-4 P-115GQCh-4 P-116GQCh-4 P-117GQCh-4 P-118GQCh-4 P-119GQCh-4 P-120GQCh-4 P-121ILCh-4 P-122ILCh-4 P-123ILCh-4 P-125ILCh-4 P-126ILCh-4 P-127ILCh-4 P-128ILCh-4 P-129ILCh-4 P-130ILCh-4 P-135SCQCh-4 P-136SCQCh-4 P-137SCQCh-4 P-139SCQCh-4 P-141SCQCh-4 P-142SCQ

Additional Science Solutions

Find more solutions based on key concepts

Show solutions add

Name the following compounds. a Cu(NO2)3 b (NH4)3P c K2SO3 d Hg3N2

General Chemistry - Standalone book (MindTap Course List)

A salt does not release ________ in water. a. ions b. H+

Biology: The Unity and Diversity of Life (MindTap Course List)

All of the following are health risks associated with excessive body fat except. a. respiratory problems b. sle...

Nutrition: Concepts and Controversies - Standalone book (MindTap Course List)

Chemistry In Focus

Describe the secondary structure of DNA as proposed by Watson and Crick.

Chemistry for Today: General, Organic, and Biochemistry

A long solenoid, with its axis along the x axis, consists of 200 turns per meter of wire that carries a steady ...

Physics for Scientists and Engineers, Technology Update (No access codes included)