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These vocabulary words are used in this unit:. Solution9. ConcentratedSolute10. Unsaturated SolutionSolvent11. Saturated SolutionMiscible12. Supersaturated SolutionImmiscible13. MolarityEndothermic14. MolalityExothermic15. Parts per millionDilute16. Polar molecule. Solubility depends upon the substances.
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1. Solubility & Solutions Water Unit C.4
3. Solubility depends upon the substances Dissolving occurs when the attraction between solute and solvent is strong.
Generally this is: “like dissolves like”
Polar dissolves Polar
or
Nonpolar dissolves Nonpolar
4. Polar vs. Non Polar Polar Molecules: have an uneven distribution of electrons = have regions of positive and negative charge
How do you tell if something is polar or not??
Polar (ionic) = 1st element is a metal/cation
Non-Polar (covalent) = 1st element is a non-metal
polar (ionic) solvents dissolve polar solutes
non-polar (covalent) solvents dissolve non-polar solutes
6. Solids dissolve better when: The surface area is greatest;
The temperature of the solute is higher;
The solute is being agitated.
OR, Heat it! Crush it! Stir it!
7. When gases dissolve: Usually exothermic (releases heat) therefore feels hot
Less disorder (particles aren’t traveling as randomly)
8. Effects of Temperature and Pressure on rate of solution
9. Please turn to page 62 . . . In your small group, 3 or less, complete the exercise on page 62.
Be sure to discuss your answers with each other, and that each of you has a chance to draw.