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What is a mixture?
- A combination of elements or compounds that are physically blended together but not bound by chemical bonds. (EX: Air you breathe)
- Can be liquids, solids, or gasses.
- Common liquid mixtures are solutions, colloids, and suspensions.
What is a colloid?
- A solution with large particles of solute that scatter light as it passes through it, which makes the solution translucent, cloudy, or opaque. (think milk color)
- A colloid is a solution.
What is a suspension?
- A suspended material that might mix with a liquid or suspending medium for some time, but eventually settles out.
- Does not stay evenly dispersed like a solution. (Is not homogeneous)
What are two common ways the concentration of solvents are expressed?
- Mass per volume percentage (EX: 14.1% alcohol per volume)
- Moles per liter (EX: A 1 molar (1 M) solution = 1 mole of a solute in 1 liter of solution)
What is a mole?
- A mole is 6.02 * 10^23 of something.
- A mole of an elements atoms is = to its atomic mass in grams. (A mole of a molecule is the sum of all its monomers atomic masses as grams.)
- A mole of something other than an atom or molecule is "a mole of FU", formula unit.