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Given the following reaction:
N2H2(l) + 2H2O2(l) → N2(g)+4H2O(l)
In 0.7 seconds, 0.812g N2 is produced. What is the rate of consumption of H2O2
in mol/s?
2. a) Sketch the potential energy curve to show the following:
• energy of activation is 150 KJ for the forward reaction
• Change in enthalpy is +30 KJ for the forward reaction
b) what is the energy of activation for the reverse reaction?
3. a) Write the equation for the second step in this reaction mechanism:
Step 1 A → 2B
Step 2 ?
Step 3 M + F → L + H
Step 4 B + T → H
Overall A + F → E + H
b) List any reaction intermediates. If there are none, then state NONE
c) List any catalysts. If there are none, state NONE
4. In terms of Potential Energy and Kinetic Energy, explain what happens as
particles approach each other to form an activated complex
5. When a system is stressed by adding more of a given reactant (increasing its
concentration), describe the rate of forward reaction and reverse reaction
initially
AND
Describe the rate of the forward and reverse reactions as they approach
equilibrium.
6. Given the following equation
Mg(s) + 2 HCl(aq) → MgCl2(aq) + H2(g)
△H = -425 KJ
a) Which side favors entropy? Explain.
b) Which side favors enthalpy? Explain.
c) In terms of reaction, will it occur? Will it go to equilibrium? Or will it go to
completion? Explain.
7. Given the equation :
2NO + O2 ↔ 2NO2(g)
a) Write the Keq expression for this equation.
b) If this system is at equilibrium and NO is decreased, describe what happens
to reestablish equilibrium (talk about concentrations and rates).
8. The Keq = 4.95 for the following reaction:
SO2(g) + NO ↔ SO3 + NO(g)
Given 6.40 mol of SO3 and 6.40 mol of NO are placed closed 2.0L container.
What will be the equilibrium concentrations for each species?
9. What is the chloride ion concentration after mixing 60.0mL of 0.10M NaCl with
50.0mL of 0.10 BaCl2?
10. Calculate the maximum mass of lead (II) nitrate that can be added to 1.0 L
solution of 0.15M sodium sulphate.
11. You have been given a solution containing Ba(NO3)2, CuNO3, and Zn(NO3)2.
What anion would you add to separate and remove ONE of the metal ions
present?
What anion would you add to separate and remove another ONE of the metal
ions present? (assume the first is now no longer in solution)
What anion would you add to remove the last metal present?
Show your work clearly to explain why you chose each anion and the other you
chose.
12. Will a precipitation form when you mix 0.100L of 0.050M Sodium Sulphate with
0.150L of 0.030M Calcium Nitrate?