Denis Rodrigues

7 Questions 4 Answers 0 Followers

Questions related from Denis Rodrigues

What tunes the selectivity of ionic exchange towards an ion? can we predict it? Is it pH dependent?

Cheers Everyone. I was seeing some uses of ionic exchange to recover NH4 by ionic exchange with other cations in a specific matrix. And it brought me to question what drives an ionic exchange to...

02 February 2020 9,441 1 View

Is the presence of sodium in a fertilizer considered beneficial or harmful to plants?

I am studying some aternative ways to obtain a fertilizer and one of the hypothesis ends up containing a good amount of Na+ in it(half the amount of P and Mg). I am not an agrarian, but I always...

01 January 2020 9,456 7 View

How to account for Dillution effect on Mg, Ca, Na and K concentrations on Atomic absorption spectrometry method?

Cheers. I wanted to know how much Mg, Ca, K and Na a specific Salt had. So I weighted 1g of the material, left it 24h to dry remeasured its mass, and then another 24h at 500ºC. After that the...

07 July 2019 2,872 4 View

Can we estimate how much NH3 may escape from solution if we had a base to a solution of NH4+ ions?

Imagine we have a solution with 0.090 mol of NH4Cl dissolved in an open beaker(remaining solution composition, if needed, is as follows: 0.003 mol of MgCl2.6H2O, 0.054 mol of KCl 0.016 mol of...

03 March 2019 459 4 View

Can we infer crystallinity or structure organization from XRD diffractograms and number of counts?

Hi everyone. I am studying the precipitate output at 4 pH levels, and got the stacked diffractometers in attachment. My question is, can I say from the image higher counts for the same peak...

11 November 2018 8,361 5 View

How can I know the supersaturation ratio of Struvite and Hydroxyapatite on MINTEQ when using possible solids(to allow solids to preciptiate)?

I am simulating an equilibrium for precipitation of struvite and as struvite and also hydroxyapatite may precipitate, I defined them as possible solids, so I get the data for % precipitated....

10 October 2017 5,859 1 View

Prediction of pH variation with addition of two different salts

Greetings I'm a bit, if not saying a lot, rusty in this pH exercises. Imagine you have 1L of a solution of salts dissolved in water which becomes stable(in equilibrium) at pH 7.2. Can we predict...

06 June 2017 3,055 4 View