Does an IB Chemistry EE have to include an experiment?

A Chemistry EE does not necessarily have to contain student-generated experimental work. A student may use secondary data, theoretical modelling, or published research if the method produces enough evidence for sustained chemical analysis. However, the essay must still have an unmistakable chemistry focus and critically evaluate the quality and comparability of its sources. Experimental work is often attractive because it gives you direct control over variables, but an unreliable experiment is not better than a rigorous secondary-data study. Confirm the suitability of your intended method with your supervisor before committing to it.

What is the difference between a Chemistry EE and a Chemistry IA?

The Extended Essay is an independently researched paper with an upper limit of 4,000 words, while the current Chemistry scientific investigation has a maximum of 3,000 words. An EE usually requires a more sustained line of argument, broader engagement with scientific literature, and deeper evaluation of the chosen methodology. It should not simply repeat an IA experiment with more trials or a longer introduction. The EE can combine experimental results with published evidence, theoretical models, and detailed discussion of limitations. Students must also follow the EE supervision and reflection process specified for their assessment session.

Can I use a common experiment for my Chemistry EE?

Yes, a familiar experiment can support a strong EE if it is developed into a focused and analytically demanding investigation. Techniques such as titration, colorimetry, calorimetry, and electrochemical measurement are valuable because they are accessible and can produce repeatable quantitative data. Originality does not require inventing a completely new reaction or using university-level instruments. It can come from the specific variable, chemical system, model comparison, or interpretation you choose. What matters is that you justify the method, understand the chemistry, and evaluate the evidence critically.

How many data points should a Chemistry EE experiment have?

The IB does not prescribe one universal number of data points for every Chemistry EE. You need enough independent-variable levels and repeated measurements to establish a defensible pattern and estimate random variation. For many continuous investigations, approximately 5-7 well-spaced levels with repeats may be a reasonable starting point, but this is practical advice rather than an official rule. Kinetic studies may require many measurements over time, while an equilibrium study may use fewer conditions but more extensive modelling. A pilot experiment should determine the range, spacing, and number of repeats needed for your particular method.

Are environmental chemistry topics suitable for a Chemistry EE?

Environmental chemistry can be highly suitable if the investigation remains centred on chemical principles. Topics involving adsorption, water treatment, corrosion, polymer degradation, or ion equilibria can provide strong chemical analysis. A broad discussion of pollution policy or environmental consequences would not, by itself, establish an adequate Chemistry focus. Your evidence should involve chemical measurements, molecular explanations, equilibrium relationships, reaction mechanisms, or comparable subject-specific analysis. If the question genuinely requires equal use of another discipline, discuss the interdisciplinary EE pathway with your coordinator.

When should I finalize my Chemistry EE research question?

Begin with a provisional question, but do not finalize its wording before checking sources, equipment, safety, and measurement sensitivity. During fall scoping, identify several possible directions and conduct a small pilot where practical. Use the results to adjust the variable range, chemical system, controls, and analytical method. Major changes should be discussed with your supervisor because they may affect feasibility and subject fit. Finalize the question when you can explain exactly what evidence will answer it and why the proposed method is chemically appropriate.

Back to all posts

IB Chemistry EE Topics Worth Researching This Fall

IB Chemistry Extended Essay IB IB Extended Essay

• 12 Oct 2026•10

IB Chemistry EE Topics Worth Researching This Fall

Join 650k+ students breezing through the IBReady to breeze through the IB?

IB Chemistry EE Topics Worth Researching This Fall | RevisionDojo

Back to all posts

IB Chemistry EE Topics Worth Researching This Fall

IB Chemistry Extended Essay IB IB Extended Essay

• 12 Oct 2026•10

The strongest IB Chemistry EE topics are focused chemical problems that generate reliable evidence, support sustained analysis, and can be investigated safely with available equipment. Promising areas for fall 2026 include adsorption, kinetics, electrochemistry, equilibrium, corrosion, analytical chemistry, and environmentally relevant materials.

The ideas below are starting points, not finished research questions. Adapt each one to your laboratory, interests, supervisor's guidance, and assessment session.

What makes a strong Chemistry Extended Essay topic?

The IB defines the Extended Essay as an independent research project resulting in a paper of up to 4,000 words. Under the framework first assessed in May 2027, students can follow a subject-focused or interdisciplinary pathway. Confirm with your coordinator which framework applies to your examination session.

A subject-focused Chemistry EE must maintain a clear chemical emphasis. Environmental, biological, or industrial contexts can provide a rationale, but the analysis should centre on concepts such as equilibrium, kinetics, energetics, molecular structure, bonding, redox processes, or intermolecular forces.

A suitable topic normally provides:

A focused, answerable research question
A measurable chemical outcome or defensible secondary dataset
A method supported by chemical theory
Enough evidence for modelling, uncertainty analysis, and evaluation
Safe materials, suitable supervision, and responsible disposal
Scope for interpretation rather than simple trend reporting

Complexity is not automatically rewarded. A straightforward experiment completed rigorously is stronger than an ambitious synthesis or instrumental procedure that cannot be controlled reliably.

Feasible IB Chemistry EE topics to scope this fall

These Extended Essay ideas for Chemistry can support more analysis than a routine practical. Pilot testing should determine the final chemicals, concentration range, temperature range, and measurement method.

Area	Possible research angle	Chemical analysis	Main feasibility issue
Adsorption	Effect of pH on dye adsorption by activated carbon	Calibration curves, adsorption capacity, isotherms	Dye stability across the pH range
Vitamin C degradation	Effect of temperature on ascorbic acid degradation	Redox titration, rate constants, Arrhenius plot	Light, oxygen, and pH require control
Electrochemistry	Effect of ion concentration on galvanic-cell potential	Nernst equation and non-ideal behaviour	Electrode preparation and salt bridges
Corrosion	Effect of a plant-derived inhibitor on iron corrosion	Redox chemistry and inhibition efficiency	Extract composition may vary
Catalysis	Temperature and catalysed hydrogen peroxide decomposition	Initial rates, activation energy, mechanism	Gas leakage or inconsistent catalyst surfaces
Acid-base equilibrium	Temperature and the dissociation constant of a weak acid	Titration curves and van't Hoff analysis	Temperature-specific pH calibration
Solvent chemistry	Ethanol percentage and extraction of a coloured compound	Polarity, Beer-Lambert law, partitioning	Evaporation and matrix effects
Water chemistry	pH and metal-ion removal by precipitation	Solubility equilibria and complex ions	Safety and chemical disposal
Polymer chemistry	pH and degradation of a biodegradable polymer	Hydrolysis and structure-property relationships	Fragmentation may resemble chemical degradation
Secondary data	Substituent effects on benzoic acid acidity	pKa data and Hammett relationships	Published conditions must be comparable

Promising research angles

Adsorption and water treatment

Adsorption connects molecular interactions with an environmental application. A colorimeter or spectrophotometer can measure the dye concentration remaining after contact with activated carbon, allowing adsorption capacity to be calculated.

A strong essay might compare Langmuir and Freundlich models or explain how pH changes the charge of the adsorbate and adsorbent surface. RevisionDojo's Chemistry EE adsorption exemplar demonstrates possible analytical structure, but should not be copied.

Kinetics and degradation

Kinetics provides access to rate equations, mechanisms, activation energy, and uncertainty analysis. Vitamin C degradation is more controllable in a prepared model solution than in commercial drinks with different formulations.

The important task is to determine a defensible rate constant. The reciprocal of one endpoint time does not automatically establish a rate law. Pilot data should confirm that the reaction is measurable within the available laboratory period.

Electrochemistry

A concentration cell or conventional galvanic cell can test the Nernst equation with school equipment. The investigation becomes suitable for an EE when it compares theoretical and experimental potentials and evaluates activity, junction potentials, electrode condition, temperature, and instrument loading.

Avoid simply comparing unrelated metals. A continuous variable, such as concentration or temperature, usually produces a more coherent argument and stronger mathematical treatment.

Secondary-data chemistry

A Chemistry EE can use published data instead of relying entirely on experiments. For example, pKa values for substituted benzoic acids can be compared with Hammett substituent constants to investigate inductive and resonance effects.

Values measured in different solvents, temperatures, or ionic strengths should not be combined without evaluation. This approach is useful when laboratory access is limited, but it requires careful engagement with original scientific literature.

Turning an idea into a focused research question

A broad topic such as “corrosion” is not yet a research question. Define the chemical system, independent variable, measured outcome, method, and important controlled conditions.

A useful template is:

How does [quantified independent variable] affect [measured chemical outcome] in [defined system] under [controlled conditions], and how well does the result agree with [chemical model]?

Instead of asking how temperature affects vitamin C, investigate how it affects the pseudo-first-order degradation rate constant of ascorbic acid in a buffered model solution, determined through iodometric analysis. Add the final temperature range only after pilot testing.

Use the RevisionDojo Chemistry EE guide with official guidance. The guide to choosing a strong EE topic can help assess scope and source availability.

A realistic fall scoping plan

Choose three candidate areas connected to chemistry you understand.
Check access and safety, including equipment, chemicals, supervision, waste procedures, and time limits.
Find credible literature before finalizing the question.
Run a small pilot to determine whether the effect exceeds measurement uncertainty.
Select an analytical model, such as a rate law, adsorption isotherm, equilibrium expression, or Nernst equation.
Revise the question in response to the pilot results.
Record your reasoning, including why the final method is safer or more reliable.

Take two or three candidate questions to your supervisor rather than one fixed proposal. Early discussion can reveal safety, access, and scope problems before they disrupt the investigation.

Common mistakes when choosing a topic

A fashionable context does not guarantee sufficient chemistry. Essays about pollution, medicine, food, or climate must still analyse matter and chemical change using appropriate concepts and evidence.

Conclusion

The best IB Chemistry EE topics balance chemical depth with practical restraint. Adsorption, kinetics, electrochemistry, equilibrium, corrosion, solvent effects, and secondary-data studies can all work when the question is narrow and the evidence is interpretable.

Use fall 2026 to compare options, review literature, complete pilot tests, and discuss safety with your supervisor. RevisionDojo's Chemistry EE examples, Chemistry EE guide, and Jojo AI can help you test scope and understand effective structures without replacing your own decisions.

Sources and referenced URLs

Add as a preferred source on Google

The ideas below are starting points, not finished research questions. Adapt each one to your laboratory, interests, supervisor's guidance, and assessment session.

What makes a strong Chemistry Extended Essay topic?

A suitable topic normally provides:

A focused, answerable research question
A measurable chemical outcome or defensible secondary dataset
A method supported by chemical theory
Enough evidence for modelling, uncertainty analysis, and evaluation
Safe materials, suitable supervision, and responsible disposal
Scope for interpretation rather than simple trend reporting

Complexity is not automatically rewarded. A straightforward experiment completed rigorously is stronger than an ambitious synthesis or instrumental procedure that cannot be controlled reliably.