Chemistry Forum

ChenBeier wrote: ↑Thu Nov 16, 2023 5:03 am Mostly the same, but also tetra and hexa complexes are possible.

Thank you @ChenBeier.
Do you know any source (pdf, article etc.) about ethanole amines - metal complexes? I can check about ratios.

ChenBeier wrote: ↑Wed Oct 11, 2023 2:34 am TEA make only a Bis-complex with copper.

You need a ratio of 2:1 of moles TEA : Cu 2+

Hello again;
What about for other metals such as iron, zinc, magnesium etc? Are these rule (2:1) valid for every metal?
Thank you.

ChenBeier wrote: ↑Thu Nov 02, 2023 6:33 am No, volumina don't work additive. Keyword volume contraction.

Thanks to you, I learned something new.

Hello; If I mix; 100 ml water, 150 g 1,2-propanediol, 20 g copper sulfate pentahydrate 5 g disodium EDTA dihydrate Does total volume of mixture 100+144.79+8.74+4.95= 258.48 ml? Density of 1,2-propanediol 1.036 g/cm3 Density of copper sulfate pentahydrate 2.286 g/cm3 Density of disodium EDTA dihydrat...

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Thank you @ChenBeier

Hello; I need to prepare this solution: Contains formaldehyde solution 9.72 g (equals to 3.4 g formaldehyde), ddH2O ad 100 ml. I have this formaldehyde solution in my hand: https://www.merckmillipore.com/GB/en/product/Formaldehyde-solution-about-370-0,MDA_CHEM-104002 How can I calculate dilution rat...

ChenBeier wrote: ↑Wed Oct 11, 2023 3:12 am But use really weight not ml, even its a liquid.

I see. Thank you again for help

I am sorry I made an mistake.
I have w/w not v/v

Thank you so much for your quick reply. I have 85% TEA (v/v) solution in my hand. So I need to use 1.4 g of 85% TEA for each gram of CuSO4*5H2O. Is it right? Is this princible (2:1) only valid for Cu+2 or, it is valid for every metal ions? And what about for monoethanolamine and diethanolamine? Is s...

Hello;
I am triying to prepare copper - TEA complex.
I couldn't find complex ratio for copper - TEA. I want to use CuSO4*5H2O for as copper source. How many TEA do I need to use for each gram of CuSO4*5H2O?
Thank you for your helps.