CHEM 6B Lecture Notes - Lecture 6: Phosphorus Pentachloride, Phosphorus Trichloride, Equilibrium Constant

• School: UCSD
• Department: Chemistry and Biochemistry
• Course: CHEM 6B
• Professor: Sandrine Bernoilles

Document Summary

When eq is attained, the [ ] of pcl5 is 0. 33m. What is the kc: goal: get concentration of everything at equilibrium. 77m: kc = [pcl3][cl2]/[pcl5] (. 77)(. 77)/(. 33) = 1. 80. If hi increases, will shift equilibrium to the left: calculating the concentration of all components at equilibrium, we combine 0. 400m h2 and 0. 400m i2 in a reaction vessel at 200c. 2x: [2x]^2 / (0. 4-x)(0. 4-x) = 53. 3, sqrt both sides, 2x / 0. 4-x = 7. 301, x = 0. 3139, h2 = 0. 086. I2 = 0. 086: hi = 0. 628, a 0. 50 mole sample of pcl5 at 250c is injected into an empty 2. 0l container @ 250c. Calculate the eq [ ] of all species: pcl5 (g) pcl3 (g) + cl2 (g) kc = 1. 80 250c, 0. 5 mol / 2l = 0. 25m pcl5. In a reaction vessel at 20c, we mix 0. 649 bar of n2 with 0. 649bar of o2.