Sciencemadness Discussion Board

Magnesium citrate

μSv/hr - 15-5-2019 at 17:28

When hydrochloric acid is reacted with magnesium citrate, will the resulting products be magnesium chloride and citric acid?

Keras - 15-5-2019 at 20:47

Seems legit, but you have to add enough HCl to push the pH under citric acid’s first pKa. Otherwise you get a mixed species.

Ubya - 15-5-2019 at 22:34

without a way of separating the 2 from solution adding HCl simply adds chloride and H+ ions in solution, so you could say to have MgCl2 and citric acid but you have a solution of citrate, citric acid, chloride, Mg2+ and H3O+

Citric acid

μSv/hr - 16-5-2019 at 03:40

How could a solution of citric acid in solution have its solubility lowered enough to remove citric acid without evaporation?

Keras - 16-5-2019 at 06:05

Quote: Originally posted by μSv/hr  
How could a solution of citric acid in solution have its solubility lowered enough to remove citric acid without evaporation?


Cool it. The solubility of citric acid decreases greatly as water temp approaches 0 °C.

But in your case, Ubya is right, you will have a hard time separating both species (MgCl2 and citric acid) as both are very soluble in water.

However, you'd maybe be better off with acetone and sulfuric acid. Magnesium sulfate is insoluble in acetone, whereas citric acid is.