I have bought some
anhydride of trichloroacetic acid (TCA) and would like to prepare an acidic solution. My problem is, that I don't know how much "powder" to mix with how much water to produce an x% acidic solution of TCA. I am aiming for as close to 100% as possible. From what I know, I need to measure pH to derive the concentration (I only have some litmus paper to do that)? Does there exist formulas or tables, that I can follow? Sources of these?
EDIT: Based on a comment, I obtained these values:
I have bought 1 kg of TCA powder of
1000 g / 163.38 gmol^-1 = 6.1207 mol 18.01528 gmol^-1 * 6.1207 mol = 110.27 g of water
somehow I need to dissolve 1 kg of powder into 110.27 mL of water. How can that work? I doubt 1 kg of powder can be dissolved in such a tiny amount of water.
EDIT2: Wikipedia says
Solubility in water: Soluble in 0.1 parts. Does this mean I need
0.1 * TCA amount for a 100% solution? That would mean I need to dissolve 1 kg of TCA in 100 mL of water.
EDIT3: If you have any idea about the true solubility of TCA, please help, there seems to be a lot of misinformation out there. 1000 g / 100 mL seems very strange to me! You can see the strange data here, from multiple sources.
EDIT4: I have asked my Chinese supplier about how they prepare their TCA solution and he said they use 120g - 154.1g / 100 mL recipe for a "standard" solution. The concentration can then be calculated by mole or by mass, but naturally is never 100%. The only way a 100% liquid TCA could exist would be to melt it down into liquid form.