Could you me to solve edta question?
1) in 10.00 ml calcium hydroxide we add 2 ml of ammonia buffer and five drops of calmagite indicator
if we add 50.00 ml of edta to reach endpoint how to calculate solubility?
2) why add calmagite indicator before edta titration?
3) they said blue color is endpoint so this mean in solution their only (ca+edta) complex?

Which is an example of the practical pursuit of alchemy? a. forming perfect substances. b. transforming base metals. c. developing metalworking techniques. d. linking spiritual characteristics with material substances.

Which statement best describes what happens when molecular compounds melt

Nitric acid can be formed in two steps from the atmospheric gases nitrogen and oxygen, plus hydrogen prepared by reforming natural gas. in the first step, nitrogen and hydrogen react to form ammonia: (g) (g) (g) in the second step, ammonia and oxygen react to form nitric acid and water: (g) (g) (g) (g) calculate the net change in enthalpy for the formation of one mole of nitric acid from nitrogen, hydrogen and oxygen from these reactions. round your answer to the nearest .