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26 Cards in this Set
- Front
- Back
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Does changing pressure affect equilibrium?
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NO
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Adding water to a system will decrease the concentrations of all components but what will it do to the equilibrium?
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Shift it to the side with more moles, causing more moles of the components on that side to be produced
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Decreasing volume of a system will move equilibrium towards
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side with least number of moles
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Decreasing concentrations of PRODUCTS will cause system to shift to
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right
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If Q<K then reaction will move (forward or reverse)
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forward
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if Q>K then reaction will move (forward or reverse)
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reverse
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If K decreases with an Increase in temperature then the reaction is
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exothermic
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strong acid and a strong base make a _____ salt
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neutral
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The salt of a weak base and a weak acid is (acidic, basic, or can be both) because
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can be both depending on the base and acids Ka and Kb values. Whichever ionizes to a greater extent will be the determining factor for pH
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work in moles when doing _______
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titration
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work in molarity when doing
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buffer or pH
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Which can be zero at equilibrium? delta G or delta H knot?
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delta G; deltaGknot=deltaG + RTln(Q)... delta G is dependent on product and reactant concentrations
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put in order of strongest to weakest:
hydrogen, dispersion, dipole, ionic |
ionic, hydrogen, dipole, dispersion
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at what Pressure does boiling point occur??
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760 torr or 1 atm
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A dissolution process is exothermic if the amount of energy released in bringing about ? interactions is greater than the sum of the amounts of energy absorbed in overcoming ? and ? interactions.
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Solute-solvent; solute-solute; solvent-solvent
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All pairs of liquids will dissolve completely in each other if the resulting energy change is not too unfavorable because
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the change in entropy always favors complete miscibility.
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Which of the following is the best explanation of why sugar is not very soluble in gasoline?
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There is hydrogen bonding in the sugar
crystal, but not between sugar and gasoline. |
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in the case of miscibility like dissolves ____
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like
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colligative properties deal with
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number of solute particles in solution,
not the type |
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deltaTb=Kb(m) can also be written as... and is used when given
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deltaTb=Kb(gsolute/MWsolute(kgsolvent))
Boiling points |
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delta T f =
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T f knot- T f
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delta T b=
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T b- T b knot
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with osmotic pressure it should be in (torr, atm)
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atm
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Gas pressures are low at ____ altitudes.
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high
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Ammonium nitrate absorbs 26 kJ/mole of heat when it is dissolved in water. Why does this compound readily dissolve in water?
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The resulting entropy increase in the system more than offsets the entropy decrease in the surroundings.
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More solvent molecules pass through a semi-permeable membrane from the side with higher concentration of solvent molecules to the side with lower concentration of solvent molecules than in the other direction. The pressure necessary to counteract this net movement of solvent molecules is called
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osmotic pressure
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