Chemical Equilibrium Practice
8 problems · instant feedback · full explanations
Equilibrium problems reward careful setup. These eight problems cover writing Kc expressions, computing Kc, using Q, and predicting shifts with Le Chatelier's principle.
Q1.
For N2 + 3H2 <=> 2NH3, the Kc expression is:
Multiple choice · Medium
Q2.
At equilibrium, the forward and reverse reaction rates are equal.
True / False · Beginner
Q3.
Adding more N2 to N2 + 3H2 <=> 2NH3 at equilibrium shifts the reaction:
Multiple choice · Easy
Q4.
At equilibrium, [NH3] = 0.40 M, [N2] = 0.10 M, [H2] = 0.20 M for N2 + 3H2 <=> 2NH3. Calculate Kc.
Numerical answer · Medium
Q5.
Increasing the pressure shifts equilibrium toward the side with fewer moles of gas.
True / False · Easy
Q6.
If Q < K for a reaction, the reaction proceeds:
Multiple choice · Medium
Q7.
For the reaction above, Kc = 200 at 500 K. Find Kp using Kp = Kc(RT)^delta_n with R = 0.08206 L atm / mol K.
Numerical answer · Hard
Q8.
Adding a catalyst to a reaction at equilibrium:
Multiple choice · Easy