Chapter 12 lopez tro

Chapter 12 lopez tro - Solutions and Their Properties Chapter 12 Chemistry 1046 Solutions Homogeneous mixtures Varied composition Appears to be one

Info iconThis preview shows pages 1–10. Sign up to view the full content.

View Full Document Right Arrow Icon
1 Solutions and Their Properties Chapter 12 - Chemistry 1046 Solutions Homogeneous mixtures Varied composition Appears to be one substance – but not really If given a choice, nature chooses spontaneous mixing Sea water is composed of a lot of different things including organisms. (it is not really a solution but a mixture)
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
2 Solutions The solute is that in present in the smaller amount The solvent is that present in the larger amount. The solution is the whole thing. Solution Formation Saturated: Contains the maximum amount of solute that will dissolve in a given solvent. Unsaturated: Contains less solute than a solvent has the capacity to dissolve. Supersaturated: Contains more solute than would be present in a saturated solution. Crystallization: The process in which dissolved solute comes out of the solution and forms crystals.
Background image of page 2
3 Solution Formation super saturated A super saturated solution contains more solute than it can handled. Once precipitation is initiated, the solid drops out immediately.
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
4 Solution Formation The Cl- ion is solvated by the water molecules. The less electronegative H atoms point towards the Cl - The positive Na + ion is solvated by the water molecules. The more electronegative oxygen points towards the Na + Solution Formation Both of these types of solutions lead to an increase in randomness or entropy
Background image of page 4
5 Solution Formation Both of these types of solutions lead to an increase in randomness or entropy Solution Formation IN most cases solution formation is accompanied by an increase in randomness. The exception is gas in a liquid or gas in a solid. For this reason the solubility of gases in liquids or solids will decrease with increasing temperature
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
6 Like dissolves like. If the solute and solvent have similar interactions then the solute will be soluble in the solvent. If the solute and solvent have different properties, they will prefer to remain separate, since they do not interact Solution Formation Solubility: A measure of how much solute will dissolve in a solvent at a specific temperature. Solubility may be expressed in units of molarity or g/L Miscible: Two (or more) liquids that are completely soluble in each other in all proportions. Solvation: The process in which an ion or a molecule is surrounded by solvent molecules arranged in a specific manner.
Background image of page 6
7 The ΔH soln varies depending on the charge and size of the ions. The ΔS soln is always positive, since the solid is in a much more ordered state Effect of Temperature on Solubility 01 Solids:
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
8 Effect of Temperature on Solubility 02 Gases: Solution Formation 1. Predict the relative solubilities in the following cases: (a) Br 2 in benzene (C 6 H 6 ) and in water, (b) KCl in carbon tetrachloride and in liquid ammonia, (c) urea (NH 2 ) 2 CO in carbon disulfide and in water.
Background image of page 8
9 Solution Formation 1.
Background image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 10
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 12/17/2011 for the course CHM 1046 taught by Professor Staff during the Fall '08 term at FIU.

Page1 / 34

Chapter 12 lopez tro - Solutions and Their Properties Chapter 12 Chemistry 1046 Solutions Homogeneous mixtures Varied composition Appears to be one

This preview shows document pages 1 - 10. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online