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Results tagged with everyday-chemistry
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user 16035
Applications of chemistry to reagents, reactions and processes of everyday life. Use this tag for question on chemistry in an out-of-laboratory/class context. DO NOT use this tag merely because the question is about simple chemistry.
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Is sodium "also known to turn purple and combust (like lithium)," when exposed to water?
I understand that indicator solutions can change color depending on pH, but the following statements in the Phys.org article Super cheap earth element to advance new battery tech to the industry has m …
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Why and how is rust forming on moon?
note: @Mithron's proposed duplicate Why can't rust form without water? does not have anything about the conditions on the Moon, so no, it's not a duplicate.
Several popular news articles mention that …
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Why does internal combustion engine smoke appear blue? Could there be "blue molecules" in it?
Four-stroke and two-stroke gasoline engines as well as diesel engines can all emit dense clouds of blue-tinged smoke under various transient loads or incorrectly tuned conditions.
Raleigh scattering …
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Acetic acid odor while testing CO2 sensor; can it be easily removed, is there a better way?
A friend asked me to help test a hobby-quality $\ce{CO2}$ sensor MG-811 (updated link). It uses a solid electrolyte and should provide a sensitivity of something like -40 mV per decade. I though I'd j …
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Is there such a thing as a "minimal soap" molecule?
Wikipedia's Soap gives sodium stearate as an example of soap, and apparently I've been eating it:
Sodium stearate is the sodium salt of stearic acid. This white solid is the most common soap. It i …
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Making sense of these recipes for removing anodized coatings of aluminum
Background:
There are several black anodized aluminum optical mounting components I'd like to use inside a high vacuum chamber (circa $1 \times 10^{-7}$ Torr or mbar) but several people including the …
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What component(s) of instant coffee make it deliquescent?
If I put small, separate piles of instant black coffee powder, sugar, powdered creamer, and even something very ionic like table salt out in humid air and come back in a few days, only the instant cof …
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Why does bleach feel slippery?
My high-school chemistry teacher taught us the mantra "bases are slippery-soapy-slimy!"
This question and this answer in Quora say this is due to saponification - conversion of lipids from the top l …
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What is a "tri-salt polymer" as described by this product that eliminates and prevents mold?
This answer mentions an anti-mold product called Concrobium Mold Control. The FAQ linked on their website says:
Q: I see Sodium Carbonate listed on the label. Is Concrobium Mold Control just Sodium C …
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How to align povidone-iodine molecules in order to look for optical polarization
In this answer I mention how early polarizing filters (e.g. sunglasses) were made by doping a polymer with iodine atoms and then stretching the film to orient the polymer molecules.
Electrons donated …
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When it rains, it puddles. Spilled salt cycles between wet and dry with humidity. Is this ak...
I have some spilled un-iodized table salt (NaCl). It is very humid where I live, and when it gets very humid for a few days, the salt absorbs so much water that it becomes a puddle of (probably) satur …
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Chemistry behind cleaning with vinegar vs citric acid; do they work differently? Should I pr...
I noticed a pack of "Mysterious Citric Acid" while out shopping so I picked it up to see what the big deal was. Several palates of the stuff had just arrived at a local outlet store. I figured that so …
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2
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How did Sinclair Oil put "liquid nickel" into gasoline, and what were the chemical mechanism...
The April 22, 2022 Veritasium video The Man Who Accidentally Killed The Most People In History is worth a watch, and was the basis for the question Why would tellurium + sodium hydroxide have worked a …
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Quantifying soapiness; there's pH, pKa and pO2, is there a p_soap or p_surfactance?
Yes, $\mathrm{pH}$ is a concentration, $\mathrm{p}K_\mathrm{a}$ is a dissociation constant, and $\mathrm{pO_2}$ is a partial pressure. These are (roughly speaking) ways to indicate how much of a key i …
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Could we reach a pH of 4.9 by blowing through straws?
According to Wikipedia's article on Breathing:
The permanent gases in gas we exhale are 4% to 5% by volume more carbon dioxide and 4% to 5% by volume less oxygen than was inhaled.
If I started …
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