Properties of Solutions CA Standards Students know the
- Slides: 13
Properties of Solutions
CA Standards Students know the definitions of solute and solvent. Students know how to describe the dissolving process at the molecular level by using the concept of random molecular motion. Students know temperature, pressure, and surface area affect the dissolving process.
Solutions are homogeneous mixtures
Standard 6 a Solute A solute is the dissolved substance in a solution. Salt in salt water Sugar in soda drinks Carbon dioxide in soda drinks ·Solid in Solid-Liquid mixtures ·The lesser amounts in liquid-liquid mixtures ·gas in gas-liquid mixtures
Solvent Standard 6 a A solvent is the dissolving medium in a solution. Water in salt water Water in soda ·Liquid in Solid-Liquid mixtures ·The larger amounts in liquid-liquid mixtures ·Liquid in gas-liquid mixtures Water is the universal solvent!!!
“The Solution Process” What causes solute and solvent to become a solution? Caused by the random molecular motion of the solvent http: //www. learnerstv. com/animation. php? ani=122&cat=chemistry Standard 6 b
“Factors that Affect the Solution Process” Temperature Agitation (stirring) Surface Area Pressure ( in gas and liquids) Standard 6 c
Solubility ·the ability of substance to dissolve ·amount of solute that can dissolve in 100 g of water
Solubility Trends Solids tend to dissolve best when: · Heated · Stirred · Ground into small particles Gases tend to dissolve best when: · The solution is cold · Pressure is high
Solubility Chart
“Like Dissolves Like” Nonpolar solutes dissolve best in nonpolar solvents Fats Benzene Steroids Hexane Waxes Toluene Polar and ionic solutes dissolve best in polar solvents Inorganic Salts Sugars Water Small alcohols Acetic acid
Homework: Create "Thinking Maps" for the Lecture and use that to write a short summary of the Lecture
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