Biology WBI12/01 January 2023 | Edexcel International AS Level Past Papers With Mark Scheme
Edexcel
International AS/A Level
Biology (WBI)
Jan
2023
2. pH Measurement–Soil Solutions: acidic vs. basic soils, buffering capacity, sensor precision, dilution effects, ion interference
3. Colorimetry–Phosphate Analysis: color intensity correlation, spectrophotometer usage, calibration curve accuracy, light wavelength role
4. Turbidity–Water Quality Testing: scattering of light, standard solution comparison, environmental implications, sensor limitations
5. Titration–Chloride in Water: silver nitrate usage, endpoint detection, Mohr method limitations, volumetric accuracy
6. Gas Sensor–Carbon Dioxide in Air: infrared absorption, ppm quantification, calibration necessity, atmospheric concentration effects
معلم موافق رایگان بودن است.
1. Conductivity Measurements–Seawater: conductivity sensor setup, temperature impact, calibration control, resistance comparison2. pH Measurement–Soil Solutions: acidic vs. basic soils, buffering capacity, sensor precision, dilution effects, ion interference
3. Colorimetry–Phosphate Analysis: color intensity correlation, spectrophotometer usage, calibration curve accuracy, light wavelength role
4. Turbidity–Water Quality Testing: scattering of light, standard solution comparison, environmental implications, sensor limitations
5. Titration–Chloride in Water: silver nitrate usage, endpoint detection, Mohr method limitations, volumetric accuracy
6. Gas Sensor–Carbon Dioxide in Air: infrared absorption, ppm quantification, calibration necessity, atmospheric concentration effects
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