EDTA is a very important analytical molecule used to complex divalent metals in order to determine their concentration in a solution. The following reaction takes place:

EDTA^ 4 (aq) +Ca^+2 (aq) [EDTA(Ca)]^ 2 .

What is the concentration of Calcium in the tap water 250.0 mL of the tap water sample is titrated to the endpoint with 3.19 of 0.0500 M EDTA?

What is the mass of 8 moles of sodium atoms

What is i fracture in the crust called when land move up, down or sideways

Observation and experimentation have led many scientists to accept a theory about the origin of the universe. this theory is called the big bang theory. scientific evidence collected and observed by scientists around the world suggests that the universe is ever expanding from a hot and dense initial state. what makes this a scientific theory? (2 points)