Chemistry - Chemical Kinetics - Reaction rate introduction - Rate Concepts Walkthrough

4-step introduction to rates. Step 1: 'WHAT IS RATE? Rate = change in concentration ÷ change in time. Units: mol/L/s (or mol dm⁻³ s⁻¹). For A→B: Rate = -Δ[A]/Δt = +Δ[product]/Δt. Negative sign for reactants because [A] decreases.' Step 2: 'AVERAGE vs INSTANTANEOUS RATE. Average rate = Δ[A]/Δt over a