Questions tagged [geochemistry]
Chemical processes and dynamics associated with geological processes, including hydro-thermal veins and weathering on Earth. For questions about other celestial bodies, please use [astrochemistry].
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Prepration of standards for analysis of chromium using AAS
I have conducted experiments to study specific adsorption of chromium in various soils and I made my all solutions of cr with using 0.01M NaNO3 as background electrolyte. (I made solutions of 5 ...
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What do we use Rare Earth Elements/ lanthanides for in geochemistry? [closed]
What kind of things are lanthanides used for in geochemical studies in terms of high temperature igneous systems and dating rocks from the earth, moon, and solar system?
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Is it possible to (naturally) change alkalinity without changing pH?
The Bjerrum plot shows how the different species of dissolved inorganic carbon (DIC) are distributed in sea water as a function of pH. The higher the pH, the more carbonate ion, less dissolved $\ce{...
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What does "bulk concentration" mean?
In biogeochemistry/ecosystem models, the concentration of phytoplankton in sea water is often termed "bulk concentration" with units mol P/m^3 (moles of phosphorus per cubic meter, assuming ...
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Why does calcined feldspar crumble?
For context, I am a potter and am interested in collecting and processing all materials that I use by myself. One of the processes which I use is calcination of certain minerals like feldspar, so that ...
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What is calcined lawsonite?
For context, I am planning to try and use this sample to make a ceramic glaze.
I recently collected a sample of what I think is lawsonite, which has the chemical formula $\ce{CaAl_2Si_2O7(OH)_2*H_2O}$....
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Physical Chemistry: Specifically the Dissolution of Carbonates
Please note this question is different to the other that keeps being mentioned. That one is about the concentration of just $\ce{HCO3-}$ when no $\ce {pH}$ was given.
Whereas, in this one I am trying ...
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Why are the rare Earth elements divided into light and heavy categories?
Rare Earth's up to z=62 (Samarium) are often called 'light' rare Earths, while z=63 (Europium) and beyond are sometimes referred to as 'heavy' ones. Why such distinction? I didn't have come across (or ...
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Does Pyrite react with HCl?
I was wondering if anyone has some experience regarding my question. The geochemical simulation of mixing a mole of pyrite with a kilogram of acidic solution (pH=1) shows that Pyrite almost remains ...
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How to calculate molar concentration from equilibrium equations with no initial concentration given [duplicate]
Consider the following equations:
\begin{align}
\tag{1}
\ce{CO2 (g) + H2O (l) &<=> H2CO3 (aq)} &
K_\ce{CO2} &= 10^{-1.47}\\
\tag{2}
\ce{H2CO3 (aq) &<=> H+ (aq) + HCO^...
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Why are rare earth metals and platinum group metals are often found clustered together in ores
Rare earth and platinum group metals are often found clustered together in the earth's crust. Mining for platinum, for instance, also yields Rhodium and Ruthenium belonging to the same group. Likewise,...
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Which acetate salt is blue and turns yellow when dissolved in water?
***Update
Some questions I am considering to try to answer this question;
When dissolving the powder in acetic acid, which ions are present?
From what I've read, I haven't found any acetate salts ...
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Do most elements generally exist in a planet during early formation, or is it a small subset?
I'm interested in whether there are a small subset of elements that are by far the most common in a planet's early stages of formation and a wider range are formed slowly over time through chemical ...
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Si(OH)4 vs. H4SiO4 vs. SiO2.2H2O
Can someone please explain to me what is the differences between $\ce{Si(OH)4}$, $\ce{H4SiO4}$, and $\ce{SiO2.2H2O}$? I am currently studying sandstone acidizing geochemical models and this question ...
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What does a comma signify in inorganic chemistry?
$\ce{(Ca{,}Co)CO3}$
I have never ever seen this before. What does this mean exactly?
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