Chemical equilibrium problems
Answers are for parents and teachers.
1
2NO + O₂ ⇌ 2NO₂ in a 4 L vessel: at equilibrium [NO] = 1 and [NO₂] = 3 mol/L. What was the initial amount of NO in mol?
16
2
N₂O₄ ⇌ 2NO₂ in a 5 L vessel: at equilibrium [N₂O₄] = 2 and [NO₂] = 6 mol/L. What was the initial amount of N₂O₄ in mol?
25
3
A + B ⇌ C + D, K = 1, initially [A] = 3 and [B] = 6 mol/L, no products. What is [C] at equilibrium in mol/L?
2
4
In esterification K = 4 with 6 mol/L of acid and alcohol at the start. How many mol/L of ester at equilibrium?
4
5
When a reagent is added to a system at equilibrium, why do the concentrations at the new equilibrium differ while K does not?
The system returns to the ratio equal to K; K depends only on temperature.