Equilibrium Chemistry Worksheet
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6Worksheet 18 - Equilibrium
Balance the following reaction, and use it to answer the following 8 questions:
___ N
(g) + ___ H
(g)
___ NH
(g)
2
2
3
1.
Starting with 0.500 M N
and 0.800 M H
, the reaction is allowed to
2
2
proceed until it reaches equilibrium. In the absence of products, the value
of Q, the reaction quotient, is zero, less than any possible value of K.
o
The [NH
]
= 0.150 M at 250
C. Determine K for this reaction at this
3
eq
temperature.
a)
Start by filling in the ICE table with the Initial concentrations.
[N
] (M)
[H
] (M)
[NH
] (M)
2
2
3
Initial
_____
_____
_____
Change
_____
_____
_____
Equilibrium
_____
_____
_____
b)
Next, fill in the Changes in the system, in terms of x, which
will determined by the stoichiometry. Reactants are used
up (-) and products are formed (+).
c)
Next, write equilibrium expressions, in terms of initial
concentrations and the changes that occur (x).
d)
Solve for x from the information you have.
x = ______
e)
Write the equation for K, the equilibrium constant, in terms
of the concentrations of reactants and products.
K =
f)
Finally, determine the numerical value of the equilibrium
constant, K at this temperature.
K =
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