Concept explainers
Interpretation:
The reason due to which dissolving can be described as either a physical or chemical change must be explained.
Concept introduction:
Dissolving is a process in which a solute is homogeneously distributed within the solvent making a solution.
Answer to Problem 2E
In some cases, dissolving is a physical change and in some cases, dissolving is a chemical change.
Explanation of Solution
Many dissolution processes are an example of physical change in which no change in chemical properties takes place. For example, when sugar is dissolved in water, then solid sugar forms a homogeneous mixture in water via the formation of hydrogen bonds with water.
In some cases, dissolution takes place via the formation of soluble ions or complex.
For example, gold forms soluble complex ion with NaCN in the presence of oxygen and water.
The reaction is represented as follows:
This is a chemical change.
Thus, dissolving can be a physical or chemical change.
Chapter U4 Solutions
Living By Chemistry: First Edition Textbook
Additional Science Textbook Solutions
Microbiology: An Introduction
Anatomy & Physiology (6th Edition)
Microbiology with Diseases by Body System (5th Edition)
Genetic Analysis: An Integrated Approach (3rd Edition)
Brock Biology of Microorganisms (15th Edition)
Campbell Biology (11th Edition)
- 4. a) Give a suitable rationale for the following cyclization, stating the type of process involved (e.g. 9-endo-dig), clearly showing the mechanistic details at each step. H CO₂Me 1) NaOMe 2) H3O® CO₂Mearrow_forward2. Platinum and other group 10 metals often act as solid phase hydrogenation catalysts for unsaturated hydrocarbons such as propylene, CH3CHCH2. In order for the reaction to be catalyzed the propylene molecules must first adsorb onto the surface. In order to completely cover the surface of a piece of platinum that has an area of 1.50 cm² with propylene, a total of 3.45 x 10¹7 molecules are needed. Determine the mass of the propylene molecules that have been absorbed onto the platinum surface.arrow_forwardChem 141, Dr. Haefner 2. (a) Many main group oxides form acidic solutions when added to water. For example solid tetraphosphorous decaoxide reacts with water to produce phosphoric acid. Write a balanced chemical equation for this reaction. (b) Calcium phosphate reacts with silicon dioxide and carbon graphite at elevated temperatures to produce white phosphorous (P4) as a gas along with calcium silicate (Silcate ion is SiO3²-) and carbon monoxide. Write a balanced chemical equation for this reaction.arrow_forward
- Problem Set 4a Chem 1411. A latex balloon is filled with a total of carbon dioxide gas so that its volume reaches 1.352 L. The balloon whose weight was originally 0.753 g, now weighs 2.538 g. How many molecules of carbon dioxide have been added to the balloon?arrow_forwardQ18. 30 minutes left please help!!arrow_forwardQ35. Please help wth these drawings! I only have an hour left!!arrow_forward
- Briefly indicate and with examples the differences between metallic cluster and cage compound.arrow_forwardIndicate the correct answer.a) In boranes, the B-B bonds are the most reactive.b) The B-H-B bonds are the reactive centers in the B2H6 molecule.arrow_forwardIn boranes, the B-B bonds are the most reactive.arrow_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