University:
High School
Course:
High School Chemistry
Academic year:

2020
Views:

68

Pages:

6
Author:

rstovrbz

EQUILIBRIUM CONSTANT (K) Write the expression for the equilibrium constant K for the reactions below. N₂(g) + 3H₂(g) ⇌ 2NH₃(g) Keq = [NH₃]² / [N₂][H₂]³ 2KClO₃(s) ⇌ 2KCl(s) + 3O₂(g) Keq = [O₂]³ H₂O(l) ⇌ H⁺(aq) + OH⁻(aq) 2CO(g) + O₂(g) ⇌ 2CO₂(g) Keq = [CO₂]² / [CO]²[O₂] Li₂CO₃(s) ⇌ 2Li⁺(aq) + CO₃²⁻(aq) Keq = [Li⁺]²[CO₃²⁻] CALCULATIONS USING THE EQUILIBRIUM CONSTANT Using the equilibrium constant expressions you determined on page 79, calculate 1 the value of K when: 2 [NH₃] = 0.0100 M, [N₂] = 0.0200 M, [H₂] = 0.0200 M (0.01)² / (0.02)(0.02)³ = 625 [O₂] = 0.0500 M (0.05)³ = 1.25 x 10⁻⁴ [H⁺] = 1 x 10⁻⁸ M, [OH⁻] = 1 x 10⁻⁶ M (1 x 10⁻⁸)(1 x 10⁻⁶) = 1 x 10⁻¹⁴ [CO] = 2.0 M, [O₂] = 1.5 M, [CO₂] = 3.0 M (3.0)² / (2.0)²(1.5) = 1.5 [Li⁺] = 0.2 M, [CO₃²⁻] = 0.1 M (0.2)²(0.1) = 4 x 10⁻³