Bring A-Level Chemistry practical work to life with this fully interactive, high-fidelity web simulation designed specifically for OCR PAG 2.3 (Determination of Relative Formula Mass of a Group 1 Carbonate).

Built with modern, responsive web technologies, this resource immerses students in an authentic virtual laboratory environment where they must accurately execute every quantitative step of the titration protocol before calculating their results.

Key Features & Learning ObjectivesComplete Practical Workflow: Guides students step-by-step through the entire two-phase protocol:
Phase 1: Weighing by difference on an interactive electronic balance, dissolving solid X2CO3, quantitative transfer to a 250 cm3 volumetric flask, and making up to the mark.
Phase 2: Pipetting a 25.0 cm3 aliquot into a conical flask, adding methyl orange indicator, and carrying out a trial run followed by accurate titrations.

• Realistic Physics & Drag-and-Drop Mechanics: Students must physically manipulate equipment (dragging weighing bottles, wash bottles, pipettes, and flasks to correct locations) to progress.

• Dynamic Indicator Color Transitions: Accurately models the methyl orange endpoint, shifting from yellow to orange at the equivalence point, and turning red if students over-titrate.

• Built-in Error Recovery: If a student overshoots the endpoint (turns the solution red), they are prompted to empty the conical flask into the waste beaker, re-pipette a fresh aliquot, and repeat the run just like in a real lab.

• Automated Data Logging & Concordance: Real-time data tables record initial/final burette readings, calculate individual titres to the nearest 0.05 cm3, exclude rough trials, check for concordance (within 0.10 cm3, and automatically compute the final mean concordant titre.