Edexcel IGCSE Chemistry · 4CH1 Specification

Virtual Lab Experiments

Observe dynamic equilibrium and reversible reactions in simulated closed laboratory chambers. Manipulate thermal energy to trigger reversible hydration and thermal dissociation.

Hydrated Copper(II) Sulfate Reactor
CuSO₄·5H₂O(s) ⇌ CuSO₄(s) + 5H₂O(g)
TEMP: 25°CSYSTEM: Sealed Boiling Tube SIMULATION ACTIVE
Hydrated CuSO₄·5H₂O (Blue Crystals)
Heat Source: Extinguished
MICROSCOPIC PARTICLES
Cu²⁺
SO₄²⁻
H₂O
H₂O
Cu²⁺
SO₄²⁻
Real-time Observations & State Changes

Initial state: Hydrated copper(II) sulfate crystals (CuSO₄·5H₂O) at 25°C. Solid is bright blue.

Mandatory Laboratory Safety Protocols

This interface provides an illustrative digital simulation. Ammonia (NH₃) is an irritant to respiratory systems and eyes, and Hydrogen Chloride (HCl) gas forms toxic, corrosive fumes in air. In real educational environments, experiments with ammonium chloride must be performed inside a certified fume cupboard under teacher supervision.

Reaction Dynamics & Stoichiometry
4CH1 Spec
Balanced Reversible Equation
CuSO₄·5H₂O(s) ⇌ CuSO₄(s) + 5H₂O(l)
Forward Process:Endothermic (+ΔH), Heat absorbed
Reverse Process:Exothermic (-ΔH), Heat released
Water of Crystallisation:5 moles H₂O per mole salt
Color Transition:Bright Blue ⇌ White Powder
Key IGCSE Exam Takeaways

The symbol ⇌ denotes that the reaction is reversible. The products formed can react together to reform the original reactants under changed or maintained environmental conditions.

Next Recommended Step

Delve into Le Chatelier's Principle and the industrial conditions of the Haber Process.

Explore Equilibrium Principles
Edexcel IGCSE Chemistry · 4CH1 Specification

Dynamic Equilibrium Simulator

Observe how forward and reverse reactions proceed simultaneously in a closed container. Equilibrium is achieved when forward and reverse rates become equal and concentrations stop changing.

Current Shift
Forward⇌Reverse
Closed Containment Vessel [V = 1.0 dm³]
EQUILIBRIUM REACHED (R_f = R_r)
Reactant A (24)
Product B (24)
Collision Transfer:Active
Illustrative IGCSE particulate simulation model.
55%

Rate of A converting to B. Increasing shifts equilibrium to the right.

55%

Rate of B converting back to A. Increasing shifts equilibrium to the left.

Kinetic Diagnostics
Real-time molecular measurements within the reactor.
System StateDynamic Equilibrium
Rates equal in closed system
Reactant [A] Moles24 units
Constant at equilibrium
Product [B] Moles24 units
Continuous bidirectional flow
Net Reaction Velocity0% net bias
Zero net concentration shift
Key IGCSE Concept

What makes this dynamic?

  • Microscopic motion never halts: Reactant particles continue colliding and forming products at the exact same frequency that products revert.
  • Macroscopic constancy: Because the forward and reverse rates are equal, overall amounts of reactants and products stay invariant.
  • Closed boundary condition: Neither matter nor energy escapes, making reversible dynamic balance possible.