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    May 2021
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  1. definitely don't do 3 sciences. you would have to study for both subjects because i assume IGCSE physics has a different syllabus than IB physics. so just choose whichever one u like more
  2. Since this is an antilog equation, my teacher said that propagating concentration uncertainties from pH is beyond the scope of IB Chemistry syllabus so I would have to do another way. He said that I should " calculate half the range of the pH values for each variation." What does this mean???? For context, let's say my pH is 2.13 +/- 0.05 and my H+ concentration is 7.41E-3. How would I get the uncertainty of it? thank you so much 🙂
  3. I want to analyze how (storage) temperature affects the pH of orange juice. My teacher told me to narrow it down to a specific chemical found in orange juice so i was thinking citric acid. unless vitamin c would be better? but i was thinking to just make citric acid solutions by myself with the crystals. I’ve heard mixed emotions about this topic; some that it’s too basic and others that it’s good. someone told me that it’s too basic because “any fifth grader could measure pH” but it does require calculations. not sure of which yet bc I just got introduced to the IA.. any ideas on what i’d ne
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