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26 Cards in this Set
- Front
- Back
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equation for dilution
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M1 x V1 = M2 x V2
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What must you remember about this dilution equation?
M1 x V1 = M2 x V2 |
Has to be in liters, because molarity is mol/L
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How much water must be added to 100 mL of 0.3 M Nacl to prepare a 0.055 M NaCl solution?
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Use M1V1 = M2V2.
Then recognize that volume is 100 mL right now, but V2 = 600 mL. Subtract the difference. 500 mL must be added |
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equation for molarity, moles, and volume
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M x V = # moles
(cuz moles/liter is molarity) |
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strips of metal to conduct electricity
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electrodes
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electrolyte
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compounds that conduct electricity when dissolved in water
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I know the definition of an electrolyte, but what kind of compounds are electrolytes?
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ionic compounds
or metal compounds that dissolve/react to form ions |
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strong electrolytes
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100% ionized in water
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weak electrolytes
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not 100% ionized in water
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equivalent
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the amount of material (in grams) that will provide one mole of charge
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1 Eq
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1 Eq (equivalent) = molar mass of ion (g)/ charge on ion
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1 mEq
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1/1000 of an equivalent
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colligative properties
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properties of solutions that depend on concentration, not on the identity of the dissolved species
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vapor pressure
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the pressure exerted by a gas when in equilibrium with liquid phase
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what is vapor pressure proportional to
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prorportional to number of particles with enough kinetic energy to evaporate
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nonvolatile solute
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can't evaporate
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what happens to the vapor pressure if 10% fewer solvent molecules are able to evaporate
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vapor pressure reduced by 10%
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what happens to the vapor pressure of a solution with the concentration of nonvolatile solute goes down?
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the vapor pressure goes up
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temperature where vapor pressure = atmospheric pressure
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boiling point
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freezing point
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temperature where solid and liquid exist in equilibrium
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Remember the "more higher more" and "fewer lower less" mnemonic? What was that for?
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for osmosis
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what happens to the oxidation number if electrons are gained?
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oxi # goes down
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is a reaction spontaneous or not with a positive G?
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non-spontaneous
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Group two has what charge
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+2
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to get parts per million
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weight or volume/ weight or volume x a million
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1 mL of water = how many g
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1 mL water = 1 g water
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