Water and Solution Chemistry.pdf - Water and Solution...

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Water and Solution Chemistry9.01 Water and Its SolutionsAfter this section, we’ll be able to:1.Describe the properties of liquid watering explain why it is the universal solvent2.Explain the solution process, including identifying to solute and solvent3.Describe the factors that influence the solubility of solutes in a solvent4.Compare unsaturated, saturated, and supersaturated solutions5.Use general solubility rules to predict the solubility of ionic compounds6.Predict the products of and write ionic equations for precipitation reactionsCohesion and Surface TensionCohesionis the attractive force that exists between like particles.All substances have some degree of cohesion among their particles, but waters cohesiveforces are remarkably strong — water shows its cohesion when it splashes out of a spoon in acontinuous like sheet.Review: what intermolecular force creates cohesion among water molecules? What is requiredfor this force to form? Partially negative O end of one water molecule is attracted to thepartially positive H end of another water molecule. This is a hydrogen bond. H-bonds formbetween O, N, or F atom of one molecule to the H atom of another molecule. In the other atom,the H atom must be covalently bonded to one of the electronegative elements (O,N, of F)previously mentioned.Water has an unusually high boiling point when compared to compound with similarly-sizedmolecules. How do cohesive forces explain this difference? To boil a liquid, attractive forcesbetween molecules must be disrupted.Water’s cohesion createssurface tension— the tendency to maintain a minimum surfacearea.Water molecules at the liquid’s surface are strongly attracted to their neighbors, so they resistbeing pushed apart, as the weight of a paper clip on top of water tries to push surface watermolecules out of place, the water molecules at the surface cling together, resisting the attemptto increase the water’s surface area.Water droplets in spherical shapes exhibit surface tension because the sphere is actually theshape with the smallest surface area per volume. Forming spherical drops minimizes theexposed surface area and maximizes the number of cohesive forces that can form amongwater molecules.1
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/Organic-Chemistry-with-Biological-Applications-3rd-Edition-9781285842912-300/
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Chapter 15 / Exercise 15.7
Organic Chemistry with Biological Applications
McMurry
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Surface tension changes with temperature— higher temperatures make water molecules tomove about with greater energy and disrupt some of the h-bonds between the molecules,decreasing waters surface tension.

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Term
Summer
Professor
RAVI SHANKAR
Tags
Chemistry, Acids, Solution Chemistry
We have textbook solutions for you!
The document you are viewing contains questions related to this textbook.
Organic Chemistry with Biological Applications
The document you are viewing contains questions related to this textbook.
Chapter 15 / Exercise 15.7
Organic Chemistry with Biological Applications
McMurry
Expert Verified

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