
Concept explainers
Interpretation:
In a
Concept Introduction:
- A chemical reaction is represented in terms of a chemical equation with the reactants on the left and the products on the right
- Yield refers to the amount of product formed from a known quantity of the reactants

Answer to Problem 34A
If a certain amount of reactant is left over after the reaction proceeds to completion, then it is said to be present 'in excess'. A limiting reactant is completely used up and cannot be present in excess. The presence of an excess of a reactant does not affect the mass of the products.
Explanation of Solution
Chemical reactions generally proceed when known quantities of reactants combine to form products. The reactants can be present in equal amounts or in varying amounts. If some amount of a particular reactant remains after the reaction is complete, then that reactant is said to be present 'in excess'.
For any given reaction, a limiting reactant is one that is present in the smallest amount (with respect to moles) and is fully consumed during the course of the reaction. Hence they cannot be present in excess.
The reaction yield or the amount of product formed depends only on the limiting reactant since it is the one that gets completely used up. The presence of excess reactant does not affect the mass of the products
Therefore, the maximum yield of a reaction depends on the nature of the limiting reactant which is usually present in the smallest amount.
Chapter 9 Solutions
World of Chemistry, 3rd edition
- Identify if their reaction is most likely SN1 or SN2 mechanism.arrow_forwardDraw the products formed when the following alkene is treated with 03 followed by Zn, H₂O. Be sure to answer all parts. draw structure ... smaller molar mass product draw structure ... larger molar mass productarrow_forwardComplete the two step reaction show the mechanism for all steps.arrow_forward
- Complete the reaction. Not the mechanism.arrow_forwardDraw the mechanism using the arrows on conventions, including all formal charges and correct arrows. If stereochemical distinction can be made they should be included in the structure of the products.arrow_forwardDraw the epoxide formed when the following alkene is treated with mCPBA. Click the "draw structure" button to launch the drawing utility. draw structure ...arrow_forward
- Rank each of the following substituted benzene molecules in order of which will react fastest (1) to slowest (4) by electrophilic aromatic substitution. Explanation Check CF3 (Choose one) OH (Choose one) H (Choose one) (Choose one) © 2025 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacyarrow_forwardIdentifying electron-donating and electron-withdrawing effects For each of the substituted benzene molecules below, determine the inductive and resonance effects the substituent will have on the benzene ring, as well as the overall electron-density of the ring compared to unsubstituted benzene. Molecule Inductive Effects Resonance Effects Overall Electron-Density CF3 O donating O donating O electron-rich O withdrawing withdrawing O no inductive effects O no resonance effects O electron-deficient O similar to benzene OCH3 Explanation Check O donating O donating ○ withdrawing withdrawing O no inductive effects no resonance effects electron-rich electron-deficient O similar to benzene Х © 2025 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy Centerarrow_forwardThe acid-base chemistry of both EDTA and EBT are important to ensuring that the reactions proceed as desired, thus the pH is controlled using a buffer. What percent of the EBT indicator will be in the desired HIn2- state at pH = 10.5. pKa1 = 6.2 and pKa2 = 11.6 of EBTarrow_forward
- ChemistryChemistryISBN:9781305957404Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCostePublisher:Cengage LearningChemistryChemistryISBN:9781259911156Author:Raymond Chang Dr., Jason Overby ProfessorPublisher:McGraw-Hill EducationPrinciples of Instrumental AnalysisChemistryISBN:9781305577213Author:Douglas A. Skoog, F. James Holler, Stanley R. CrouchPublisher:Cengage Learning
- Organic ChemistryChemistryISBN:9780078021558Author:Janice Gorzynski Smith Dr.Publisher:McGraw-Hill EducationChemistry: Principles and ReactionsChemistryISBN:9781305079373Author:William L. Masterton, Cecile N. HurleyPublisher:Cengage LearningElementary Principles of Chemical Processes, Bind...ChemistryISBN:9781118431221Author:Richard M. Felder, Ronald W. Rousseau, Lisa G. BullardPublisher:WILEY





