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Experiment 8 - Equilibrium Constant.docx

Experiment 8. Evaluating Equilibrium Constant K

Student Name (Print):__________________________

Pre-lab Study Questions (Submit upon arrival for experiment)

5.00 mL 0.002 M Fe(NO₃)₃ solution, 1.00 mL 0.002 M KSCN solution and 1.00 mL water are mixed together to make a mixture solution. Calculate [Fe³⁺] and [SCN^-] in the final solution.

Consider reversible reaction:

2 NH₃ (g) N₂(g) + 3 H₂(g)

(1) Write the expression of the equilibrium constant K_c of the above reaction.

(2) At 900 K, K_c = 0.0076. A reaction mixture initially contains 1.00 M NH₃, 0.100 M N₂ and 0.100 M H₂. Calculate reaction quotient Q_c and determine the direction the reaction will proceed.

(3) Complete an ICE (Initial-ChangeEquilibrium) chart for this reversible reaction using the data in (2)