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26 Cards in this Set

  • Front
  • Back
A reaction in which products can react to re-form reactants is said to be, a) at equilibrium, b) reversible, c) buffered, d)impossible
b) reversible
A very high value of K indicates that, a) equilibrium is reached slowly, b) products are favored, c) reactants are favored, d) equilibrium has been reached.
b) products are favored
When a stress is applied to an equilibrium, the equilibrium is displaced so as to relieve the stress.
Le Chatelier's Principle.
Dynamic state of balance between opposing forces or chemical reactions.
What is the ph of a O.O36M solution of HCN? Ka=4.9 x10(-10)
need correct answer
What is the molar solubility of PbI2 in O.10M Pb(NO3)2? Ksp for PbI2 is 1.4x10(-8)
need correct answer
What happens to the solubility of a salt dissoved in a solution containing one of the ions? and What is this called?
Decreases.......Common ion effect...
The chemical equilibrium expression for the equation L+ 2M-4N +3O is K = a)[N]4[O]3/[L][M]2, or b)[L][M]2/[N]4[O]3, or c) 4[N]3[O]/[L]2[M], or d) [L]2[M]/4[N]3[O].
a) [N]4[O]3/[L][M]2
The relationship between the concentration of products over reactants raised to whatever power shown by the coefficient is equal to a constant.
law of mass action
At equilibrium, a) forward reaction rate is less than reverse reaction rate, b) forward reaction rate is greater than reverse reaction rate, c) forward reaction rate is equal to reverse reaction rate, d) no reactions take place.
c) forward reaction rate is equal to reverse reaction rate.
Who proposed the law of mass action?
Guldberg and Waag
Given the following equilibrium: 4NH3(g) +3O2(g)-@n2(g) + 6H2O(l)...What direction would the equilibrium shift if the following stresses were applied?
a) add more O2, b) increase volume, c) remove NH3, d) increase pressure, e) add more H2O
a) forward
b) reverse
c) reverse
d) forward
e) forward
What is the molar solubility of Cu2S?
need correct answer
Will a precipitate form in a mixture of 0.034M BaCl2 and 0.042M H2SO4. Ksp for BaSO4 is 1.5 x 10(-9)
Yes a precipitate will form......Show how to solve this problem......
Given the following K's. Tell whether the product or reactant side is favored
a) 3.7 x 10(-19)
b) 49.5
c) 1.0 x 10(3)
d) 1.00
a) reactant
b) product
c) product
d) reactant
What is the ph of a.067M solution of Hydrazine. K6=1.7x10(-6)
N2H4 +H2O = N2H5+ + OH-
Hint: ignore H2O
need correct answer
Which reaction is favored in the following equilibrium......
3H2 + N2 = 2NH3 +92KJ if
a) increase temp
b) remove N2
c)increase pressure
d) add inert gas
a) reverse
b) forward
c) reverse
d) neither
Write the equilibrium expression for:
a) AgBr(s) = Ag+ + Br-
a) [AG][Br]/1
Write the equilibrium expression for
b) 5CO(g) + I2O5(s) = I2(g) + 5C02(g)
b) [I2][Co2]5/[CO]5
Write the equilibrium expression for
c) CaCO3(s) = CaO(s) + CO2(g)
c) [CO2]/1
Write the equilibrium expression for
d) 4Fe(s) + 3O2(g) = 2Fe2O3(s)
need correct answer
The reaction 2CO2 = 2CO + O2 is an all gas equilibria TAE K is 6.4 x 10(-7). If 1.0 x 10(-3) mol of CO2 is placed in a one liter container and allowed to react, what will be the equilibrium concentrations of each.
need correct answer
Determine the Ksp for CO2S3 if the molar solubility is 2.65 x 10(-5) mol/L.
need correct answer
What is the ph of a 0.045M HNO3?
need correct answer
What is the concentration of HNO2 when ph is 4.50 and Ka = 4.5 x 10(-4)?
need correct answer
What is the molar solubility of CaF2 in 0.020M NaF. Ksp for CaF2 is 1.7x 10(-10)?
need correct answer