To what extent does the effective concentration of H⁺ ions released by different acid catalysts (HCl, H₂SO₄, HNO₃, H₃PO₄, and citric acid) affect the rate of hydrolysis of methyl acetate as determined by volumetric analysis?HL
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B
Official IB Result
IB Grade: B
Criteria A: TOK Essay
6/10
0
5
10
Criteria StrandsPro
A.1Understanding
Knowledge
Questions
Good
Criteria Feedback
- The student sustains a clear line of argument throughout and returns repeatedly to the question of whether doubt is a primary driver of inquiry or only one influence among others.
- The student's use of specific examples, especially Darwin and the wartime development of penicillin, gives the essay concrete grounding and helps move beyond abstract assertion.
- The student shows genuine evaluative thinking by considering competing motivations such as necessity, funding, prestige, and strategic competition.
- The student's conclusion is qualified rather than purely descriptive, which shows an emerging ability to weigh the title rather than simply discuss it.
- The evaluation often remains broad, with counterclaims stated more than examined in depth.
- The historical material is not handled as a distinct area of knowledge, so the discussion of history stays general rather than analytical.
- Some examples are used more to illustrate a point than to analyse exactly how doubt changes the production of knowledge.
- The final judgement is clear but not fully sharpened, so the essay does not quite sustain the level of precision needed for the top band.