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Questions related from Felipe Hernández-Luis
Is there a direct and simple relationship between the solubility of a salt and the dielectric constant of the solvent or solvent mixture in which the salt is to be solubilised? For example: the...
22 March 2024 2,440 2 View
For an end-of-grade job I need to prepare a reversible Li+ ion electrode "at home". Could you give me a hint or a suggestion or a bibliography? Thank you and I look forward to hearing from you.
07 November 2019 5,883 0 View
Are there "non-toxic" ionic liquids that increase the solubility of paracetamol, ibuprofeno, etc. with respect to water, at 25-40 ºC but in a "safe for health" manner?
17 December 2018 5,142 3 View
Does anyone know of any bibliography where I can find data on Gibbs Energy of Excess or Surface Tension of N-methylacetamide + water mixtures at any temperature (preferably around 25ºC)? At that...
04 November 2018 1,609 0 View
I'm directing an end-of-degree paper for Pharmacy. It is a question of mobilizing by the electrokinetic process of some dyes and drugs present in natural soils (perfectly characterized). The...
03 September 2018 481 1 View
I'm directing some end-of-degree work in pharmacy. It is a question of mobilizing by the electrokinetic process of some dyes. The experiment in its development is simple except in the "analytical...
18 July 2018 2,759 0 View
I will put my question in a simpler way with an example. The solubility of NaCl in pure water at 25ºC is approximately 6.14 moles/L. I try to dissolve NaCl at 25ºC in equimolar mixtures (suppose...
13 July 2018 3,004 20 View
The Canary Islands are one of the regions of Spain with the most hours of sunshine per day. However, lately a significant vitamin D deficiency has been observed. Some proposed causes may be: -...
27 June 2018 5,998 28 View
In a Laboratory Practice we teach students how to determine the Critical Micellar Concentration (CMC) of surfactant substances using conductivity measurements. So far we have only used sodium...
17 June 2018 8,450 10 View
A low consumption of K+ and high of Na+ is apparently related to high blood pressure, a chronic illness with high mortality and prevalence in Canary Islands.
22 May 2018 5,210 11 View
We have verified a very small relation between the quantity of ion Na in the waters of consumption in 31 municipalities (of the Island of Tenerife) and the % of prevalencia of hypertense in esoso...
21 April 2018 5,109 0 View
Is it possible that if we want to make electroremediacion in a soil that contains Cr(III+VI) increases the amount of Cr (VI)? "It would be worse remedy than the disease"
06 March 2018 6,532 3 View
When performing a chromatogram of the same sample of water stored for months in plastic or glass bottles there are appreciable differences? What is due?
19 November 2017 6,978 3 View
I am collecting data properties of mixtures of amide-water at 298.15 K. Amides are formamide, N-Methylformamida, N-Methylacetamide and N, N-Dimethylformamide. The properties are Excess Molar Gibbs...
14 August 2017 7,402 0 View
Please, can someone provide me information or bibliography of VE (Excess Volume), S (Surface Tension) or GE (Excess Gibbs Energy of Mixing) of mixtures water-N-Methylacetamide? Thanks
06 August 2017 8,344 1 View
For a conference organized by the Real Sociedad Española de Química (R. S. E. Q.), which will be held in Sitges (Barcelona), in the month of July 2017, I am preparing a communication on "Great...
09 April 2017 5,025 4 View
Why in solutions of NaI in some solvent (formamide, N-methilformamide or N-methilacetamide pure on in aqueous mixtures) forms a yellowish color with the passage of time? I have tried to make...
23 February 2015 4,524 6 View
Dear Prof. Mathlouthi, This is the last time we contacted each other (14 years ago!). You probably no longer have the same email. I hope you are well and I don't know if you are retired or "still...
01 January 1970 4,600 0 View
