MountEETOKIA: Best, high-scoring IB EEs, IAs, TOK

Chemistry Internal Assessments [Grade 7, High-scoring]

Determining the relationship between the type of aqueous metal ions, iron(III), copper(II), cobalt(II), magnesium(II), and zinc(II), and the extent of oxidation of ascorbic acid (Vitamin C), as determined through iodometric titration.

Investigating the effect of soaking duration on the amount of Fe3+ chelated by phytic acid in chickpeas, as measured by an UV-spectrophotometer and hence determine the optimal soaking duration.

How does the concentration of acetic acid introduced to activated charcoal influence the rate of adsorption of the activated charcoal, as measured by acid-base titration?

How does the concentration of sodium chloride, 0.0%, 2.5%, 5.0%, 7.5%, 10.0% and 12.5%, affect the oxygen-carrying capacity of water, measuring using the Winkler Method of titration to determine the concentration of dissolved free oxygen, O2 in mg dm–3.

How does the concentration of HNO3 (0.250, 0.375, 0.500, 1.00, 2.000 mol dm-3) added to chlorophyll extracted from spinach leaves affect its chelation abilities of Co2+ ions in the medical treatment of heavy metal poisoning, as measured with UV Visible Spectrophotometry?

How is the removal of copper (II) ions from water using lemon peels through adsorption affected by initial pH (1,2,3,4,5) as measured using UV-Vis spectrophotometry

What is the effect of varying intensity of UV light (measured using a UV Index of 0, 0.10, 0.20, 0.30, 0.40, 0.50, 0.60 and 0.70) on the photodegradation of riboflavin using a UV-Vis Spectrophotometer?

How does the concentration of NaCl in deionised water affect the BODt of deionized water investigated through the Winkler’s Method with iodometric titration