Test a leaf for starch to demonstrate photosynthesis. Step-by-step destarching, iodine test method and results for IGCSE and IB biology practical work.
Titration – Exam Practice
Titration exam practice: determine the value of x in Fe(NH4)2(SO4)2.xH2O using potassium manganate(VII). Worked calculations for IB and A-level chemistry.
Enthalpy – Thermometric titration
Thermometric titration practical: determine enthalpy of neutralisation for HCl and ethanoic acid with NaOH. IB and A-level method with temperature-time graphs.
Enthalpy – Hess Cycles
Determine the enthalpy change for MgSO4 + 7H2O using Hess cycles. IB and A-level chemistry practical with calorimetry method and worked Hess cycle calculations.
Enthalpy – Student Design
Student-designed enthalpy experiment: measure the enthalpy of solution of ammonium chloride using calorimetry. Ideal IB IA practice with skills development.
Titration – Precipitation
Precipitation titration: determine water of crystallisation in hydrated barium chloride using silver nitrate. IB and A-level chemistry method and calculations.
Practical Science 