EDTA is a chelating agent that can bind to divalent metals. Indicate True or False for each. a. One EDTA molecule binds to two calcium ions.
b. One EDTA can bind to one magnesium ion.
c. Before EDTA titration, with the presence of the indicator Calmagite, a calcium solution will show a blue color, and upon EDTA titration with the calcium solution, the color will turn red once it has reached the endpoint.
d. There is no need to standardize EDTA solution since the concentration of EDTA is always accurate based on mass measurement.