An evidence-based study and exam-tips package for Pearson Edexcel GCSE (9-1) Chemistry (1CH0), specifically optimized for Foundation tier students to maximize marks in Paper 1F and Paper 2F.
阅读时间 3 分钟更新于: 2026年6月21日
试卷概览
卷数
2
总分
200
考试时间
3小时 30分钟
题型
3
试卷
时间
分数
题数
比重
题型
Paper 1 (Foundation Tier)
1小时 45分钟
100
36
50%
選擇題, Short Answer / Structured, Extended Writing
Paper 2 (Foundation Tier)
1小时 45分钟
100
34
50%
選擇題, Short Answer / Structured, Extended Writing
评级
54321U
计算器规定
A scientific or graphical calculator that meets JCQ regulations may be used (some GCSE Mathematics and Science papers are non-calculator). Graphical calculators must be set to exam mode; you must clear any stored programs, notes or data before the exam, and the calculator must not be able to retrieve stored text or formulae.
AO1: AO1: Demonstrate knowledge and understanding of scientific ideas, processes, techniques and procedures. (40%)
AO2: AO2: Apply knowledge, understanding and skills in scientific ideas, processes, techniques and procedures. (40%)
AO3: AO3: Analyse and evaluate scientific information, methodologies and protocols. (20%)
根据历届试题与评分标准整理（2022–2024）。
计算器程序
Table mode for roots & turning points
Scientific calculator (e.g. Casio fx-991 series)
用途: Tabulate \(y\) across a range of \(x\) to locate sign changes (roots) and approximate maxima/minima.
使用时机: Solving or sketching a function when you want to find where its graph crosses or turns.
步骤
Enter the function in TABLE mode, set the start, end and step, then read where the sign of \(y\) changes or where it peaks.
考试提示: Allowed under JCQ rules, but you must still show your method — an unsupported calculator answer earns no method marks. Clear all stored programs, notes and data (graphical calculators in exam mode) before the exam.
Statistics mode (mean, SD & regression)
Scientific calculator (e.g. Casio fx-991 series)
用途: Read the mean \(\bar{x}\) and standard deviation directly, and the gradient/intercept (and \(r\)) of a linear regression for bivariate data.
使用时机: Any data-handling, statistics, or required-practical analysis question.
步骤
Enter the data in STAT mode (1-VAR or A+BX), then recall \(\bar{x}\), \(\sigma\) or the regression coefficients.
考试提示: Allowed under JCQ rules, but you must still show your method — an unsupported calculator answer earns no method marks. Clear all stored programs, notes and data (graphical calculators in exam mode) before the exam.
Carry exact values with Ans & memory
Scientific calculator (e.g. Casio fx-991 series)
用途: Keep full-precision intermediate values to avoid rounding errors.
使用时机: Multi-step calculations where premature rounding loses the final accuracy mark.
步骤
Use Ans, STO/RCL or the M+ memory to reuse the unrounded result of each step; round only the final answer.
考试提示: Allowed under JCQ rules, but you must still show your method — an unsupported calculator answer earns no method marks. Clear all stored programs, notes and data (graphical calculators in exam mode) before the exam.
Equation solver — to CHECK your working
Scientific calculator (e.g. Casio fx-991 series)
用途: Use the built-in EQN/SOLVE mode to verify roots of quadratics or simultaneous equations you have already solved by algebra.
使用时机: As a check only, after solving by hand.
步骤
Enter the coefficients in EQN mode (or use SOLVE) and confirm they match your worked solution.
考试提示: Allowed under JCQ rules, but you must still show your method — an unsupported calculator answer earns no method marks. Clear all stored programs, notes and data (graphical calculators in exam mode) before the exam.
常见错误
1high涉及分数: 3Key concepts in chemistry (Paper 1)
Dividing Relative Atomic Mass (RAM) by the reacting mass/percentage of the element when calculating empirical formulas.
如何避免: Always divide reacting mass or percentage by the RAM (mass / RAM). Use a table format to keep columns organized for each element.
2medium涉及分数: 2Separate chemistry 2 (Paper 2)
Using hydrochloric acid (HCl) to acidify a sample before testing for chloride ions with silver nitrate.
如何避免: Use dilute nitric acid (HNO3) instead. Hydrochloric acid contains chloride ions (Cl-) which react with silver nitrate, creating a false positive white precipitate.
3medium涉及分数: 2Key concepts in chemistry (Paper 1)
Drawing multiple connecting lines from a single item on match-up/link questions, which automatically negates the marks.
如何避免: Ensure only ONE straight line is drawn from each box on the left to its corresponding box on the right.
4high涉及分数: 3Rates of reaction and energy changes (Paper 2)
Failing to convert units of time or coordinates properly during rate-of-reaction graph calculations.
如何避免: Read units carefully. If the rate requires cm3 per second and the graph is in minutes, convert the minutes to seconds by multiplying by 60.
5high涉及分数: 3Key concepts in chemistry (Paper 1)
Writing that solid ionic compounds do not conduct electricity because 'their electrons cannot move'.
如何避免: State clearly that the ions (not electrons) are held in a fixed lattice/giant structure by strong electrostatic forces and are not free to move.
6medium涉及分数: 3Rates of reaction and energy changes (Paper 2)
Omitting the subtraction step when calculating a rate using a tangent line on a graph.
如何避免: Show your full coordinate subtraction: (y2 - y1) / (x2 - x1) to represent the change in volume divided by the change in time.