Concept explainers
Interpretation:
The best reagent to precipitate copper, Cu2+ ion from a solution of copper nitrate, Cu(NO3)2 needs to be identified.
Concept introduction:
A precipitation reaction occurs between two or more reagents to produce a chemical species that is insoluble in water. The best way to remove Cu2+ from a solution of Cu(NO3)2 is by converting Cu2+ to a chemical compound that is insoluble in water.
Answer to Problem 16STP
The second option, option (B) is the correct answer.
Explanation of Solution
Reason for Correct Option:
Cu(NO3)2 is highly water soluble and ionizes in aqueous solutions to produce Cu2+ ions as below.
KOH ionizes in an aqueous solution to hydroxide, OH- ion as below.
The Cu2+ ion combines with the OH- ion to produce copper (II) hydroxide, Cu(OH)2 that remains insoluble in water and thus, Cu2+ can be quantitatively removed from the aqueous solution.
Reasons for Incorrect Options:
All chloride, Cl- salts except those of silver (Ag), mercury (Hg) and lead (Pb) are soluble in water. Thus, copper (II) chloride, CuCl2 is water-soluble and hence, Cu2+ ions cannot be removed from a solution of Cu(NO3)2 by adding solid sodium chloride, NaCl.
All nitrate, NO3- salts are water soluble and hence, solid magnesium nitrate, Mg(NO3)2 cannot remove Cu2+ ions from an aqueous solution of Cu(NO3)2.
Copper carbonate, CuCO3 is insoluble in water and hence, carbonate,
Chapter U4 Solutions
Living by Chemistry
Additional Science Textbook Solutions
Organic Chemistry (8th Edition)
General, Organic, and Biological Chemistry (3rd Edition)
Chemistry: The Central Science (14th Edition)
Chemistry: A Molecular Approach
Chemistry: The Central Science (13th Edition)
Chemistry: Structure and Properties
- 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