Titrate calcium ion and magnesium ion in water with the standard solution of EDTA and the indicator of chrome black T. What kind of ions are determined when solution changes from wine red to pure blue?
A、Magnesium ion;
B、Calcium ion;
C、The total amount of calcium and magnesium ions;
D、Total amount of all cations in water
发布时间：2025-09-02 11:36:27
