Equilibrium Concepts
Acid/Base Basics
More Acids and Bases
Other Equilibria
100
According to Le Chatlier's Principle, this type of reaction is favored by an increase in temperature
What is an endothermic reaction (ΔH° is positive)?
100
Acids typically have a pH in this range
What is pH < 7
100
The stronger an acid, the _______ its hydronium ion concentration.
What is larger?
100
According to Lewis Acid/Base Theory this type of substance accepts and electron pair
What is a Lewis Acid?
200
This relationship holds true for the value of Q vs Keq when a reaction is at equilibrium
What is Q = Keq
200
This is the Bronsted-Lowry acid and its conjugate base in the following equation
H2S + NH2- ⇌ HS- + NH3
What is H2S and HS-
200
This relationship holds true for the value of Ka vs Kb of a strong base
Ka < Kb
200
A dissolution equation proceeds in this direction when Q>Ksp
What is the reverse direction?
300
This is the expression for the reaction quotient for the following reaction
N2(g)+3H2(g)⇌2NH3(g)
What is
[NH3]2
Q = _______________
[N2]*[H2]3
300
This is the hydroxide ion concentration in a solution whose pH is 6.52
What is [OH-] = 3.31 x 10-8 M
300
This is the name for a chemical species that can act either as a n acid or a base
What is amphoteric/amphiprotic?
300
This is the Lewis Acid in the equation in which tert-butyl chloride combines with aluminum trichloride to form t-butyl chloride aluminum chloride
What is aluminum trichloride?
400
This is the value of Kc for the reaction: 2 N2O(g) + 3 O2(g) 
2 N2O4(g), using the following information.
2 N2 (g) + O2(g) 2 N2O(g) Kc = 1.2 x 10-35
N2O4(g) 2 NO2(g) Kc = 4.6 x 10-3
½ N2(g) + O2(g) NO2(g) Kc = 4.1 x 10-9
What is Kc = 1.1 x 106
400
This is the pH of 0.21 M NaOH ( a strong base)?
What is pH = 13.32
400
This is the pH of a buffer solution when it is prepared to be 0.10 M chloroacetic acid and 0.15 M sodium chloroacetate. Ka = 1.3 x10-3
What is pH 3.06?
400
In the saturated solution of NiCO3 this is the effect on the addition of calcium carbonate (CaCO3)
NiCO3(s) ⇌ Ni²⁺(aq) + CO3²⁻(aq)
What is drive the reaction in reverse to precipitate more NiCO3 (shifts left)
500
These are the equilibrium concnetrations in a mixture that initially contains [H2O] = 1.0 M, [Cl2O]= 1.0 M
H2O (g) + Cl2O (g) 2HOCl (g)
Kc = 0.0900
What is [H2O] = 0.87 M, [Cl2O]= 0.87 M, [HOCl] = 0.26 M
500
This is the base ionization constant if an equilibrium mixture has the following composition: [C6H5NH2] = 0.100 M, [C6H5NH3+] = 6.17 x 10-6 , [OH-] = 6.17 x 10-6
C6H5NH2 (aq) + H2O(l) C6H5NH3+ (aq) + OH- (aq)
What is 3.81 x 10-10
500
This is the pH of 25 mL of 0.12 M HCl titrated with 37.5 mL of 0.10 M NaOH
What is 12.08?
500
This is the solubility product constant for silver chromate given its solubility is 6.50 x 10-5 M
Ag2CrO4(s) --> 2 Ag+(aq) + CrO42-(aq)
What is Ksp = 1.1 x 10-12
Ksp = [Ag+]2[CrO42-]