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UNIT 3: SOLUTIONS

Covers Unit 3 over Water and Solutions

TermDefinition
Polar molecule A molecule with a positive and a negative end
Non-polar molecule A molecule without a positive or negative end
Solute Whatever is BEING DISSOLVED into a solution (the smaller amt.)
Solvent Whatever is doing the dissolving in a solution (the larger amt.)
Solution
Water is called the _______ _______ because its polar nature allows it to dissolve many things. Universal Solvent
Adhesion Water molecules sticking to other things (ex. your window)
Cohesion Water molecules sticking to one another.
Hydrogen bonding Type of bonds holding multiple water molecules together
Covalent bonding Type of bonding between oxygen and hydrogen atoms within the SAME water molecule.
"Like Dissolves Like" The saying describing what type of solutions dissolve best in others. "Polar dissolves polar". "Non-polar dissolves non-polar".
Viscosity A substances resistance to flow. Thick substance = high viscosity Runny, thin substance = low viscosity
Buoyancy The ability or tendency of something to float.
Boiling point The temperature at which a substance goes through a phase change from a liquid to a gas.
Freezing point The temperature at which a substance goes through a phase change from a liquid to a solid.
Surface Tension A film created on the surface of a liquid caused by the attraction of particles in the surface area.
Dissolving rate The rate at which a solute dissolves completely into a solute
Solubility The max amount of a substance that will dissolve in a given amt. of solvent at a given temperature.
3 ways to increase the dissolving rate of a substance = 1. Stir it 2. Crush it 3. Heat it
Soluble Dissolves
Insoluble Does not dissolve
Created by: kpartin
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