Mismatched units in Thermodynamic calculations, substituting entropy in Joules directly into Gibbs Free Energy calculations.

Always divide entropy values (typically in J K-1 mol-1) by 1000 to convert them to kJ K-1 mol-1 before using them in the equation: Delta G = Delta H - T * Delta S.

Drawing sloppy curly arrows in reaction mechanisms that start or end in empty spaces.

Ensure curly arrows start precisely on a lone pair of electrons, a formal negative charge, or a covalent/pi bond, and point directly to the nucleus of the electron-deficient atom.

Failing to convert volume from dm3 or cm3 to m3 when using the Ideal Gas Equation.

When using the gas constant R = 8.31 J K-1 mol-1, always convert volume to cubic meters (m3) by dividing dm3 by 1000, or dividing cm3 by 1,000,000.

Failing to double the absolute uncertainty of a balance or burette when calculating total experimental uncertainty.

For subtraction-based measurements (like mass differences or final/initial burette volumes), you must sum the absolute uncertainties of both measurements (e.g., 2 x +/- 0.05 cm3 = +/- 0.10 cm3).

Omitting charges on fragments in mass spectrometry questions.

Always include a positive charge symbol (e.g., CH3+ or COOH+) on chemical formulas representing molecular or fragment ions in mass spectra.

Drawing incorrect connectivity for functional groups, particularly linking a bond directly to the hydrogen atom of a hydroxyl or carboxyl group.

Explicitly draw bonds to show carbon-oxygen connectivity (C-O-H), ensuring that lines do not end on hydrogen atoms.

IB DP · 試験対策

Chemistry 試験対策

This comprehensive guide for IB DP Chemistry SL highlights critical exam-day techniques, strategic time management across Papers 1A, 1B, and 2, and evidence-based solutions to common experimental and theoretical pitfalls. Derived from examiner insights, it includes practical study strategies and calculator methods for maximum scoring efficiency.

読了時間 5 分更新日: 2026年6月21日

試験の概要

試験数

満点

165

制限時間

4時間 30分

出題形式

試験	時間	配点	問題数	配点比率	出題形式
Paper 1A	1時間 20分	40	—	—	—
Paper 1B	40分	35	—	—	—
Paper 2	2時間 30分	90	—	—	—

評価段階

7654321

電卓の規定

A graphic display calculator (GDC) from the IB-approved list is required for most Mathematics and Sciences papers and must be set to examination mode. Note that some papers do not permit a calculator (for example Mathematics Paper 1 and the multiple-choice Sciences Paper 1).

AO1: Demonstrate knowledge and understanding of chemical facts, concepts, and terminology (40%)
AO2: Apply and use chemical facts, concepts, and methodologies to solve quantitative problems (35%)
AO3: Formulate, analyze, and evaluate chemical hypotheses, experimental data, and methodologies (25%)

過去問と採点基準にもとづいて作成（2023–2025）。

電卓プログラム

Graph: zeros, intersections & turning points

Graphical calculator / GDC (exam mode)

目的: Plot a function to read its roots (zeros), points of intersection, and maxima/minima.

使う場面: Checking solutions, sketching, or solving where an analytic method is hard.

手順

Graph the function(s) and use the built-in zero, intersect and maximum/minimum tools.

試験での注意: Use a GDC from the IB-approved list in examination mode. Some papers do not permit a calculator. Always show your reasoning.

Numerical equation solver

Graphical calculator / GDC (exam mode)

目的: Solve an equation or find a variable numerically when an algebraic route is long or implicit.

使う場面: Iterative or implicit equations, or to confirm an algebraic solution.

手順

Use the equation/zero solver, entering the equation and a sensible starting estimate.

試験での注意: Use a GDC from the IB-approved list in examination mode. Some papers do not permit a calculator. Always show your reasoning.

Numerical integration & differentiation

Graphical calculator / GDC (exam mode)

目的: Evaluate a definite integral \(\int_a^b f(x)\,dx\) or a gradient \(f'(x)\) at a point.

使う場面: Checking calculus answers, or where only a numerical value is needed.

手順

Use the GDC's numeric integral / derivative function with the limits or the point.

試験での注意: Use a GDC from the IB-approved list in examination mode. Some papers do not permit a calculator. Always show your reasoning.

Statistics & probability distributions

Graphical calculator / GDC (exam mode)

目的: 1-var/2-var statistics, linear regression, and cumulative binomial / normal / Poisson probabilities without tables.

使う場面: Statistics questions and hypothesis tests.

手順

Enter data in the statistics editor, or use the distribution menu (binomial cdf, normal cdf, …).

試験での注意: Use a GDC from the IB-approved list in examination mode. Some papers do not permit a calculator. Always show your reasoning.

よくあるミス

1high影響する配点: 2Energy cycles in reactions
Mismatched units in Thermodynamic calculations, substituting entropy in Joules directly into Gibbs Free Energy calculations.
回避方法: Always divide entropy values (typically in J K-1 mol-1) by 1000 to convert them to kJ K-1 mol-1 before using them in the equation: Delta G = Delta H - T * Delta S.
2high影響する配点: 3Electron sharing reactions
Drawing sloppy curly arrows in reaction mechanisms that start or end in empty spaces.
回避方法: Ensure curly arrows start precisely on a lone pair of electrons, a formal negative charge, or a covalent/pi bond, and point directly to the nucleus of the electron-deficient atom.
3medium影響する配点: 3Ideal gases
Failing to convert volume from dm3 or cm3 to m3 when using the Ideal Gas Equation.
回避方法: When using the gas constant R = 8.31 J K-1 mol-1, always convert volume to cubic meters (m3) by dividing dm3 by 1000, or dividing cm3 by 1,000,000.
4medium影響する配点: 1Green Chemistry, Experimental Methods and Spectroscopy
Failing to double the absolute uncertainty of a balance or burette when calculating total experimental uncertainty.
回避方法: For subtraction-based measurements (like mass differences or final/initial burette volumes), you must sum the absolute uncertainties of both measurements (e.g., 2 x +/- 0.05 cm3 = +/- 0.10 cm3).
5medium影響する配点: 1Green Chemistry, Experimental Methods and Spectroscopy
Omitting charges on fragments in mass spectrometry questions.
回避方法: Always include a positive charge symbol (e.g., CH3+ or COOH+) on chemical formulas representing molecular or fragment ions in mass spectra.
6medium影響する配点: 1Functional groups: Classification of organic compounds
Drawing incorrect connectivity for functional groups, particularly linking a bond directly to the hydrogen atom of a hydroxyl or carboxyl group.
回避方法: Explicitly draw bonds to show carbon-oxygen connectivity (C-O-H), ensuring that lines do not end on hydrogen atoms.

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