High scoring IB Theory of Knowledge examples. See what past students did and make your TOK perfect by learning from examiner commented examples!

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How does varying Sodium Chloride (NaCl) concentrations (0%,1%, 2%, 3%, 4%, 5%) affect the pH of rice water during fermentation over a three-day period, as measured on the first and third day using a …

High scoring IB Theory of Knowledge Essay examples. See what past students did and make your TOK Essay perfect by learning from examiner commented examples!

How does increasing pH levels ( 3, 4, 5, 6, and 7) affect the fermentation rate (ppm) of yeast (Saccharomyces cerevisiae) when reacting in a 10% sucrose (C12H22O11) solution?

How does the height to which water is filled in a bottle (5.50, 7.20, 8.90, 10.60. 12.30, 14.00, 15.70 cm) affect the volume of water lost (in cm^3 ) and hence the volumetric flow rate (in cm^3 s^-1 )?

How does the concentration (g/L) of the “Malibu SPF30 Kids Lotion Protection” chemical sunscreen (0.0, 1.0, 2.5, 5.0, 10) affect the rate of photosynthesis (ppm/s) of freshwater green algae (Chlorella sp.) in …

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Sep 5, 2025 · IB Spanish B Grade Boundaries By Wojtek • September 5, 2025 Get feedback on your Spanish B IA Marked only by official IB examiners Learn more