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Full Member

Joined: 19 Jul 2018
Posts: 20

# Reaction between MEA (monoethanolamine) + CuSO4

Can anyone have an idea about reaction between monoethanolamine and copper sulfate pentahydrate (CuSO4.5H2O) ? I don't know the equation and exact products. Has anyone in this forum done the reaction before?

Sr. Staff Member

Joined: 27 Sep 2017
Posts: 226
Location: Berlin, Germany
 Monoethanolamin is a derivat of ammonia. Cpperions react with it to form a complex [Cu(NH3)4] ²+ . Instead of the ammonia you can set in any amin.

Full Member

Joined: 19 Jul 2018
Posts: 20
 Could you write full chemical equation for me? I still can not visualize because the equation is very important for calculation.

Sr. Staff Member

Joined: 27 Sep 2017
Posts: 226
Location: Berlin, Germany
 What is the formula aqueaus complex of copper? If you know this you exhchange water with the amin.

Full Member

Joined: 19 Jul 2018
Posts: 20
 I think the equation could be C2H7NO + CuSO4.5H2O = C2H5NOCu2+ + H2SO4 + H2O

Sr. Staff Member

Joined: 27 Sep 2017
Posts: 226
Location: Berlin, Germany
 No Copper ions in water are Cu(H2O)4 ²+ The water will exchange to the amin . The sulfate is not changed its spectator ion. First step: Cu(H2O)4 ²+ + NH2-CH2-CH2OH => [Cu(H2O)3NH2-CH2-CH2-OH] ²+ This can happen until all water is exhanged.

Full Member

Joined: 19 Jul 2018
Posts: 20
 Thanks a lot. I have 1 more question. If I continue putting H3PO3 into the solution, will complex react with acid phosphorus? Is this complex stable?

Sr. Staff Member

Joined: 27 Sep 2017
Posts: 226
Location: Berlin, Germany
 It will react, complex only stable at pH 7 and higher.

Full Member

Joined: 19 Jul 2018
Posts: 20
 If MEA is excess and H3PO3 is taken into the solution, what will complex react with first?

Sr. Staff Member

Joined: 27 Sep 2017
Posts: 226
Location: Berlin, Germany
 The acid reacts with MEA until all is neutalized and also the complex is destroyed.

Full Member

Joined: 19 Jul 2018
Posts: 20
 Yeah. Thank you so much.
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