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In context of drinking, the chemical difference between distilled and deionised water ( non ion compounds, residual ions passing the osmotic membrane ) does not matter, unless the water source has problematic quality. What matters is microbiological difference, as just distilled water is sterile, while deionised water may be enriched by microbial flora ...

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In this solution, there are two sorts of H+ ions, those coming from added HCl, whose concentration is 10-9 M, and those coming from the water which are unknown, ans so described by x. But the concentration of OH- is also x. So Kw may be written : Kw = (x + 10-9)x = 10-14. If you solve this equation, you find : x = 0.999·10-7 The total concentration of H+ ...

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Most of $\mathrm{pH}$ calculations make simplifying assumptions and one must determine if they are justified for the particular case. Simplification for strong acids $$\mathrm{pH}=-\log{[\mathrm{acid}]}$$ implies $\pu{[\mathrm{acid}] >> 10^{-7} mol/L}$. Because water dissociation constant $K_\mathrm{w}=\ce{[H+][OH-]}=\pu{10^{-14} mol^2/L^2}$, ...

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Radioactivity does not apply so much to an element as it does to a specific isotope of that element. Many elements have both radioactive and non-radioactive isotopes. In general, if a reverse osmosis membrane removes a particular element or compound it will remove all isotopes of that element to a similar degree.

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Burning (=oxidizing with oxygen from the air) organic material generates heat, because the reaction is exothermic, CO2 and H2O being energetically more stable than the organic material before combustion. Of course, despite of not being in thermodynamic equilibrium, we all don't ignite spontaneously, as there is an energetic barrier preventing this. In order ...

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To have combustion, you need three things: fuel, oxidizer, and heat. To ignite a piece of wood, you need to raise its temperature to the combustion temperature, where a significant amount of the solid hydrocarbons can vaporize, and then ignite. However, if this wood is wet, the energy input will distribute among the water and solid hydrocarbon. Water is a ...

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Hello I know I went late to the party, but I have a solution to this. You all already have the right idea, but you need to put your ideas together. Double layer your pool Whether it's gallium, water, oil, or some other liquid it will all work and be safe under glass. Their are hydrophobic resins that you can treat the glass with, and if you double paned ...

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