Overall Difficulty Verdict
The 2023 Foundation papers (1F and 2F) are rated as highly accessible, aligning comfortably with prior sittings. Paper 1F leaned heavily on direct recall of atomic structures, chemical bonds, and basic extraction methods. Paper 2F had an outstandingly clear layout, focusing on hydrocarbons, rates, and analysis. In both papers, early sub-questions utilized multiple-choice or direct matching grids, allowing students to build immediate confidence.
Where the Marks Were Won and Lost
A significant proportion of marks lay in basic scientific literacy: plotting graphs, drawing lines of best fit, and reading directly from graphs. High-scoring areas included Paper 1 Question 1 (atomic diagrams) and Paper 2 Question 3 (chromatography basics). Conversely, major mark loss occurred in the two 6-mark extended-response questions (making zinc chloride in Paper 1 and analyzing potassium bromide in Paper 2). Students often struggled to logically sequence practical steps or forgot to specify the necessary observations and chemical results.
Examiner Pitfalls & Misconceptions
- Uncertainty & Error Identification: In Paper 1 Question 10, many candidates struggled to explain the inclusion of the \(\pm 0.3\,^{\circ}\text{C}\) uncertainty or incorrectly labeled random errors as systematic.
- Maths Conversions: In Paper 1 Question 2.7, many failed to convert \(25.0\,\text{cm}^3\) to \(\text{dm}^3\) when calculating the mass of sodium hydroxide.
- Anomalous Result Calculations: In Paper 2 Question 8.2, a common mistake was including the anomalous Trial 3 when calculating the mean reaction rate and subsequent mean time.
- Squeaky Pop Test Confusion: Students frequently confused a "lit/burning splint" (correct) with a "glowing splint" (which is for oxygen) when describing the test for hydrogen.
Preparation Strategy & Future Predictions
To maximize success in future series, students must practice core practical methods (RPAs) step-by-step. Special attention should be paid to quantitative calculations, particularly mass-to-volume conversions. Given that bond energy calculations and dynamic equilibrium shifts (Le Chatelier's principle) were underrepresented in this series, they are highly tipped to return in force in subsequent papers.