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Level 130

Neutralizations Through Galvanic Cells

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Delta H
change of heat (enthalpy)
Delta S
change of disorder (entropy)
Ka of weak acid
Kb of weak base
negative delta H
gives off heat
positive delta H
takes in heat
A plot of reactant concentration versus time gives a straight line. What is the order of the rxn for this reactant?
If delta S > o, then the reaction is spontaneous or non spontaneous?
If delta S<0, then the reaction is spontaneous or non spontaneous?
Oxidation is _______
loss (of electrons)
Reduction is _______
gain (of electrons)
Cathode is the (oxidation or reduction) part of the reaction?
addition of oxygen or loss of electrons
a solution that is in equilibrium with respect to a given dissolved substance. (maximum amount of solute under normal conditions)
a solution that is not in equilibrium with respect to a given dissolved substance and in which more of the substance can dissolve. (less than maximum amount of solute under normal conditions)
Precipitate in contact with solution
If Ksp < Q, then the solution is (saturated, unsaturated or precipitate in contact with solution?)
Delta G zero = delta H zero - (Temperature*delta S zero)
Equation for delta G zero in terms of delta H and delta S?
Delta G zero if given K?
Delta G zero = -(R constant)*(Temperature)*(ln K)
Delta G if given Delta G zero?
Delta G= Delta G zero + (R*T)*ln Q
Anode to Cathode
Electrons flow from the (Anode/Cathode) to the (Anode/Cathode) in a Galvanic cell?
The salt bridge
What stops the two solutions in a galvanic cell from becoming too positive or too negative?
Arrange the physical states by increasing strength of their Delta S. ( Solid, gas, liquid)
(ex mg)
False. It can't be zero unless it is in a PERFECT crystal at 0 degrees Kelvin.
True or False: The S of a substance can be zero regardless of the temperature or state.
Negative (entropy goes down)
HCl (g) -> HCl (aq)
Ag(aq)+Cl(aq)-> AgCl (s)
Negative (entropy goes down)
H2(g)+Cl2(g)-> 2Hcl (g)
Positive (entropy goes up)
1 mol electrons = _______ coulombs = 1 Faraday