Electrochemistry & Instrumental Setups for H2 Chemistry Paper 4

Q: What does Electrochemistry & Instrumental Setups for H2 Chemistry Paper 4 cover?
A: Practical routines for potentiometric titrations, conductivity tracking, and colorimetry—covering calibration, data capture, spreadsheet processing, and ACE commentary aligned to SEAB’s 2026 H2 Chemistry Paper 4 (9729) practical expectations.

TL;DR
Paper 4 (2 h 30 min, 55 marks; Planning 5%, MMO/PDO/ACE 15% combined per SEAB 9729) tests practical skills across the syllabus. Centres often deploy potentiometry, conductivity, and colorimetry to build data-logging, calibration, and ACE commentary discipline.
Calibrate electrodes properly, log potential/absorbance data at disciplined intervals, use spreadsheets to derive equivalence points, and evaluate electrode drift and temperature effects in ACE write-ups.

Status: SEAB H2 Chemistry (9729, first exam 2026) syllabus last checked 2025-11-29 (PDF last modified 2024-07-17). Paper 4 remains 2 h 30 min, 55 marks, weighted at 20 % with Planning at 5 % and MMO/PDO/ACE at 15 % combined.

1 | Instrumental techniques in Paper 4

• The SEAB 2026 H2 Chemistry syllabus (9729) sets Paper 4 at 2 h 30 min, 55 marks, with Planning at five percent and MMO/PDO/ACE at fifteen percent; candidates must record accurate measurements and work across the listed practical techniques (titration, thermochemistry, kinetics, qualitative/organic work), so centres often include potentiometric, conductivity, and colorimetric runs to stretch those skills.
• These investigations test Planning (apparatus choice, calibration strategy), MMO (consistent data logging), PDO (turning sensor readings into usable tables/graphs), and ACE (interpreting drift, noise, and limitations).
• Candidates should be comfortable switching between manual titration manipulation and probe-based logging under timed conditions.

2 | Apparatus overview and setup