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chemistry lab test
chemistry lab test
32
Chemistry
Undergraduate 2
10/13/2011

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Term
2 e groups
0 lone pairs
Definition
e pair geometry: linear
molecular geometry: linear
bond angles: 180
Term
3 e groups
0 lone pairs
Definition
e pair geometry: trigonal planar
molecular geometry: trigonal planar
bond angles: 120
Term
3 e groups
1 electron pair
Definition
e pair geometry: trigonal planar
molecular geometry: bent
bond angles: 120
Term
4 e groups
0 lone pairs
Definition
e pair geometry: tetrahedral
molecular geometry: tetrahedral
bond angles: 109.5
Term
4 e groups
1 lone pair
Definition
e pair geometry: tetrahedral
molecular geometry: trigonal pyramid
bond angles: 109.5
Term
4 e groups
2 lone pairs
Definition
e pair geometry: tetrahedral
molecular geometry: bent
bond angles: 109.5
Term
5 e groups
0 lone pairs
Definition
e pair geometry: trigonal bipyramidal
molecular geometry: trigonal bi pyramidal
bond angles: 90,120,180
Term
5 e groups
1 lone pair
Definition
e pair geometry: trigonal bipyramidal
molecular geometry: seesaw
bond angles: 90, 120, 180
Term
5 e groups
2 lone pairs
Definition
e pair geometry: trigonal bipyramidal
molecular geometry: T shaped
bond angles: 90, 180
Term
5 e groups
3 lone pairs
Definition
e pair geometry: trigonal bipyramidal
molecular geometry: linear
bond angles: 180
Term
6 e groups
0 lone pairs
Definition
e pair geometry: octahedral
molecular geometry: octahedral
bond angles: 90
Term
6 e groups
1 lone pair
Definition
e pair geometry: octahedral
molecular geometry: square pyramidal
bond angles: 90
Term
6 e groups
2 lone pairs
Definition
e pair geometry: octahedral
molecular geometry: square planar
bond angles: 90
Term
molality
Definition
moles of solute/mass of solvent(kg)
Term
molarity
Definition
moles of solute/liters of solution
Term
freezing point depression formula
Definition
delta T = i x Kf x m
i = vant hoff factor
Kf = freezing point depression constant
m = molality
Term
Rate Law
Definition
Rate = k [A]^m [B]^n
k = rate constant
[A] & [B] = molar concentration of reactants
m & n = order of the reactants
Term
order of the reaction
Definition
the sum of the orders = m+n
Term
Mass percent
Definition
= (mass of solute/total mass of solution)x 100
Term
Dilution calculation
Definition
Mi x Vi = Mf X Vf
Term
ideal gas law
Definition
PV = nRT
R = .08206
Term
Arrhenius Equation
Definition
k = Ae^(-Ea/RT)
R = 8.31447 J/(mol * K)
Term
Arrhenius equation when comparing two points
Definition
ln (k2/k1) = (Ea/R){(1/T1) - (1/T2)}
R = 8.31447 J/(mol * K)
Term
y = mx + b for Arrhenius Equation
Definition
ln k = (-Ea/R)(1/T) + ln A
y = m x + b
Term
M/s =
Definition
(P/s)/RT
Term
what is the equilibrium constant for:
Fe+3 + SCN- -> FeSCN+2
Definition
Kc = (FeSCN+2)/ (Fe+3)(SCN-)
Term
(FeSCN+2)eq
____________ = _____
(FeSCN+2)std
Definition
Aeq
_____
Astd
Term
(Fe3+)eq =
Definition
(Fe3+)i - (FeSCN2+)eq
Term
(SCN-)eq =
Definition
(SCN-)i - (FeSCN2+)eq
Term
standard deviation of 143, 157, 137, 145
avg = 146
Definition
8.41
Term
Write the solubility product expression for the dissolution of Ca(OH)2
Definition
ksp = (Ca2+)(OH-)^2
Term
pH=
Definition
pKa + log (base)/(acid)
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