- IB IA examples for all subjects | Clastify
How does the pKa value of certain weak acids present in food (2 85, 2 99, 3 13, 4 10, 4 76) affect the loss in mass of calcium carbonate (in grams, measured using an electronic balance, ±0 01 g), and how does the addition of sodium fluoride solution affect this reaction, keeping the concentration and temperature of the acid solutions and sodium fluoride solutions, the time taken for the
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To investigate the effect of various concentrations of copper (II) sulfate solutions (0 0 mg L, 1 0 mg L, 3 0 mg L, 5 0 mg L, 7 0 mg L, 9 0 mg L) on Vigna radiata plant growth using a soilless media, measured through the change in shoot length using a ruler (±0 05cm), and the difference in chlorophyll a and b absorbance values using a UV spectrophotometer (±0 001AU), at wavelengths of 664nm
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- IB Chemistry IA examples - Clastify
How does light intensity (varied by using a UV Lamp at 365nm placed perpendicularly at 5 0cm, 10 0cm, 15 0cm, 20 0cm and 25 0cm away from the oil sample) affect the rate at which unsaturated fatty acids in 3 00g samples of sunflower oil undergoes rancidity due to exposure for a set duration of 30 hours, which will be quantified in peroxide value via an iodometric titration that compares rate
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