IB Chemistry IA examples

Starting from the May 2025 session, the Chemistry IA requirements have changed. We created a couple of exemplars to show you how the new IA should look like. It's OK to refer to the old Chemistry IA exemplars (since the new IA is quite similar) for inspiration/ideas, but make sure to follow the new requirements.

IB Chemistry IA examples

Not sure what to search for? You can always look through our example Internal Assessments below for inspiration.

All Chemistry IA Examples

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Filter exemplars

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IA

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TOK

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Grade

Level

Session

How does the distance from the city centre (1.3 km, 3.1 km, 4.1 km, 6 km, 7.1 km) affect the number of millimoles of the dissolved oxygen concentration in city ponds as measured by the Winkler Titration Method?

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What is the effect of the temperature (30, 40, 50, 60, 70 °C) on the buffering capacity (mol/dm3) of phosphate buffer, as measured using titration with 0.1 mol/dm3 HCl?

How does changing the current [3.0, 3.5, 4.0, 4.5, 5.0 A] in electrolysis affect the mass of products formed at the cathode in the electrolysis of copper and aluminium respectively?

How does the source of caffeine (Lipton Earl Grey, Lipton Yellow Label, Remsey Earl Grey, Milton Earl Grey Classic) affect its content (in g), determined using the DCM-facilitated separation funnel technique?

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What is the effect of changing temperatures (20, 40, 60, 80, 100 °C) on the amount of iodine remaining in iodized salt (in grams) after exposure to heat during cooking, as measured by an iodometric titration?

What is the effect of boiling in 100°C and filtering using the carbon filter on the hardness of tap water (mol/dm3) as measured using EDTA complexometric titration?

What is the enthalpy change in the reaction of sodium sulphate anhydrous to sodium sulphate decahydrate, by measuring their respective enthalpy change of solutions through calorimetry and using Hess’s Law?

To investigate the effect of hydroxides (sodium hydroxide, potassium hydroxide, magnesium hydroxide, calcium hydroxide, ammonia) of different pKb on neutralization reactions with hydrochloric acid.

Investigating Caffeine Mass in Tea with different Brewing Times using liquid-liquid extrac'on

To what extent do the temperature (°C) and time (sec) affect the iodine content in iodized salt in terms of change in iodine ion mass (¿g) using iodometric titration?

How is the change in mass of the copper cathode and zinc anode influenced by varying voltage levels (2V, 4V, 6V, 8V, and 10V) in the electroplating process?

How does varying voltage applied (1.0, 2.0, 3.0, 4.0, 5.0V) to a 1mol dm -3 NaOH-based alkaline water electrolytic cell using graphite electrodes in 900s affect the Faradaic efficiency (%) of its hydrogen evolution reaction?

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How does varying the pH (3.00 ± 0.01, 5.00 ± 0.01, 7.00 ± 0.01, 9.00 ± 0.01, 11.00 ± 0.01) affect the kinetics of zinc oxide catalyzed photodegradation of methylene blue dye solution?

How does varying the concentration ratio between two copper sulphate electrolytes from 1:1, 2:1, 10:1, 20:1, 100:1, 200:1, 1000:1, 2000:1, 10,000:1, 20,000:1, 100,000:1 and 200,000:1 affect the potential difference measured across a concentration cell with a voltmeter?

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How does changing the temperature (± 0.5°C) (20.0°C,30.0°C,40.0°C,50.0°C,60°C) affect the rate of reaction (moldm-3s-1) of the reaction between Crystal Violet (5.0 x 10-5 mol dm-3) and Sodium Hydroxide (0.20 mol dm-3 ) measured using a colorimeter?

What is the effect of changing temperatures (10.00, 20.00, 30.00, 40.00, 50.00°C) on the equilibrium constant, Kc, for the reaction between 0.002 mol dm-3 iron(III) nitrate and 0.002 mol dm-3 potassium thiocyanate?

What is the effect of thermal treatment (40, 50, 60, 80, 100 degrees Celsius) of buckwheat honey on 5-Hydroxymethylfurfural content, determined using a solution of honey with high performance liquid chromatography method with inverted phases and UV detection?

What is the average rate of reaction (cm^3 s^-1) of 0.5 g of crushed antacids (CaCO3 and MgCO3) in HCl solutions of varying concentrations (0.050mol.dm^-3, 0.100mol dm^-3, 0.250mol dm^-3, 0.500mol dm^-3, 1.000mol dm^-3), measured through the production of CO2 (cm^3) in 2 minutes?

To what extent is there a relationship between the temperature (25.0°C, 50.0°C, 80.0°C) of various citrus juices (orange, lemon, lime) and their vitamin C (ascorbic acid) concentration measured by redox titration?

How does the % of fatty acid composition of 5 fried cooking oil types (sunflower oil, rapeseed oil, corn oil, olive oil, and soybean oil) affect their enthalpy of combustion (ΔHC in kJ g-1), as assessed through the measurement of change in temperature in 3 minutes?

How does the carbon chain length in alcohols (methanol, ethanol, propan-1-ol, butan-1-ol, pentan-1-ol) affect the enthalpy of combustion, measured through the calorimetry method by burning each fuel for 120 seconds and measuring the temperature change of 100g of distilled water?

Investigating the reaction rate of varying concentrations of Household Bleach on Blue Food Dye

How do the Temperatures of 30.0°C, 40.0°C, 50.0°C, 60.0°C, and 70.0°C of Branded Orange Juice Affect its Vitamin C Concentration in mol.dm-3, measured with a redox titration, using an iodine solution concentration of 0.005 mol.dm-3?

How does the exposure to UV light (wavelength of 200nm) for different lengths of time (0mins, 15mins, 30mins, 45mins, 60mins) affect the concentration of Vitamin C (ascorbic acid) measured through iodine titration

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How does temperature – 283, 293, 303, 313, 323, 333 (K ± 0.1) – affect the equilibrium constant (Kc) of the iron (III) thiocyanate solution equilibrium, determined by measuring the absorbance (± 0.01) of a 470 nm wavelength using a Vernier colorimeter.

How do varying temperatures (15.0℃, 20.0℃, 25.0℃, 30.0℃, 35.0℃ ± 0.5℃) affect the buffer capacity of pH-balancing facial cleansers when titrated with 0.05mol HCl, measured using a pH probe with its ability resist changes in pH value of the 1 based on the volume of HCl titrated?

To what extent does the activation energy of an iodine clock reaction change when catalyzed by Copper (II) sulfate (CuSO4)?

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What is the effect of changing the cooking temperature (25.0 °C, 55.0 °C, 70.0 °C, 85.0 °C, and 100.0 °C) on the amount of iron (Fe2+) that leaches from Spinacia Oleracea, using a redox titration?

How does temperature (at 25 oC – 65 oC with 10oC intervals) affect the equilibrium constant for the reversible reaction between tetrachlorocobalt(II) [CO(Cl)4]2- and hexaaquacobalt(II) [Co(H2O)]2+?

What effect does the temperature of the solution (K) have on the rate of decomposition (cm3 s -1) of carbonic acid (H2CO3) to carbon dioxide (CO2) and water (H2O) and therefore what is the activation energy (kJmol-1) of this reaction?

How does the varying concentrations of hydrogen peroxide affect the initial and average redox reaction rate between sodium thiosulfate and hydrogen peroxide in an alkaline condition by measuring the change in pH using a pH meter?

What is the correlation between electric current and the amount of mass that is electroplated, and, hence, is there an optimum current?

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Want to get full marks for your IA? Allow us to review it for you

Fast track your coursework with mark schemes moderated by IB examiners. Upgrade now

Want to get full marks for your IA? Allow us to review it for you

Fast track your coursework with mark schemes moderated by IB examiners. Upgrade now