Active Module: EQUILIBRIUM
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Chemical Equilibrium & Le Chatelier Simulator
A + B ⇌ C + D: Reactions never stop; equilibrium occurs when forward and reverse rates equalize.
A+B⇌C+D(+ Heat)
Temp: 298 KK_eq: 0.64
Forward Rate r_f: 0.08 M/sReverse Rate r_r: 0.038 M/s
⚡ Rates are currently unequal: The system is responding toward a new equilibrium composition.
[A] Reactant
1 M
[B] Reactant
1 M
[C] Product
0.8 M
[D] Product
0.8 M
Apply Le Chatelier Stress / Disturbance:
Le Chatelier Response:System at dynamic chemical equilibrium: forward rate equals reverse rate.
📐Step-by-Step Mathematical Derivation
Given ➔ Formula ➔ Solve1. Given Quantities:
• Reversible Reaction: A + B ⇌ C + D (ΔH < 0, Exothermic)
• Concentrations: [A] = 1 M, [B] = 1 M, [C] = 0.8 M, [D] = 0.8 M
• Forward Rate rf = 0.08 M/s | Reverse Rate rr = 0.038 M/s
• Temperature: 298 K
2. Governing Formula:
K_eq = ([C] · [D]) / ([A] · [B]) | At Equilibrium: r_forward = r_reverse
3. Substitute Values:
K_eq = (0.8 × 0.8) / (1 × 1)
4. Calculated Result:
Equilibrium Ratio K_c = 0.64
5. Chemical Interpretation:Net Forward Shift: Forward rate exceeds reverse rate; reactants are converting into products.
⚖️Does Equilibrium Mean 50/50?
No! Equilibrium does not mean concentrations of reactants and products are equal.
Equilibrium only means the rates of the forward and reverse reactions are equal. Depending on K_eq, a system may equilibrate with 99% products or 99% reactants!