Research to create a test kit to measure calcium concentration
Science Club HCM city 2023-2024
Developed a simple and reliable test kit (with a confidence interval of 99%) that monitors calcium concentration to inform aquarists or people living near water bodies concentrated with calcium.
Applied the concept of complexometric titration and knowledge in acid-base indicators to produce the chemicals for the test kit, which consists of a buffer solution, a complexometric indicator that binds to the calcium ions for the first color change, and an organic acid to displace the calcium ions from the indicator-ion complex for the end-point color change.
Applied molar equations to determine the relationship between the number of drops of the carboxylic acid and the concentration of calcium.
