Questions tagged [everyday-chemistry]

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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252 views

What does it mean “polyester doesn't breathe”?

Often people say buy a cotton shirt because cotton "breathes" but polyester doesn't. (i.e. it makes you hot sweaty). What is the scientific meaning behind this? How does polyester trap the heat more ...
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1answer
129 views

Formic Acid vs Formica - Which came first?

Source: Google(Oxford) So, we know that 'Formic Acid' was derived in formic acid in the late 18th century from the Latin word 'formica'. From Wikipedia: Formica is a genus of ants of the family ...
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Why can't you have compressed oxygen and nitrogen in the same tank? [closed]

I just watched a movie about the Apollo missions. They wanted an oxygen/nitrogen atmosphere on the spacecraft. But they said it would be too heavy and expensive to use an oxygen tank and a nitrogen ...
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53 views

Is it safe to mix calcium carbonate and sodium chloride? [closed]

I know zero about chemistry, and Google has not offered up a plain answer, so I beeseech thee; Is it safe to mix calcium carbonate and sodium chloride to make a simple mouthwash? Calcium carbonate ...
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How can I make a reference humidity environment with NaOH pellets? [duplicate]

I have NaOH pellets at my disposal. Some of the pellets are degraded, but most are not, and I can provide a new batch if needed. I would like to test several humidity sensors in an environment with a ...
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1answer
59 views

compare and contrast a 2p6 orbital to a 4s1 using quantum numbers to help [closed]

Would you be able to help me understand how to compare and contrast a 2p6 orbital to a 4s1 using quantum numbers to help?
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96 views

Why is my washing powder not to be used for pre-wash?

Apologies but I can't find a more suitable stack exchange website to ask this question. I feel the technical answer is chemical in nature so I landed here. For at least the past two years (and on-...
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1answer
300 views

What is the physical state of vitamin E acetate at room temperature and normal pressure

Vitamin E acetate ((+)-alpha-tocopherol acetate) is sold as semi-solid/liquid by Sigma and their safety data sheet gives the melting point as 25 °C. On the other hand, internet databases such as ...
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1answer
33 views

Ingredients for cleaning optical elements

I have recently purchased a cleaning solution for precision optics which has the following ingredients (amounts were not specified): Ethyl Alcohol Methylethylketon Aqua Diethyl Ether Isopropyl ...
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1answer
31 views

Combustion and pyrolysis of sulfides and organosulfurs

Last week there was a huge fire in french chemical factory Lubrizol, we now know the main products that burnt, to simplify the discussion I extracted a few compounds: isobutyl and isobutene ...
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1answer
93 views

Coffee Degassing

I roast coffee, and currently package it in plastic bags with one way 'degassing' valves. As soon as coffee is roasted, it starts giving off $\ce{CO2},$ a process which continues for days, and ...
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1answer
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Can aroma compounds travel through metal boards and glass? [closed]

A friend from customs said "if drugs have been in a glass jar for more than a day, the aroma compounds travel through the lid and the dog can detect it, especially after 2-3 days. They can travel ...
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362 views

When alcohol is used to sterilize, what about it changes that it can't be re-used? [closed]

I read online that when you use regular household rubbing alcohol to soak something for sterilization purposes, you're then supposed to toss it out. I'm just curious why. Like, as long as there's a ...
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101 views

Propylene Glycol to clean vinyl records

I clean vinyl records with an ultrasonic record cleaning machine. Would propylene glycol be good to use as a surfactant in a 1 - 2 % concentration with distilled water? Would it harm the vinyl record?...
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180 views

Is propanol 1-2 diol 178 the same as propylene glycol?

I clean vinyl records in an ultrasonic vinyl record cleaning machine the manual states it uses propanol 1-2 diol 178 as a surfactant. I think this is the same chemical as propylene glycol. Is it? ...
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Smoky lights at events - Piped in or a chemistry reaction of some kind?

Was at Dreamhack MTL this weekend and realised that in the whole venue there seems to be just a little bit of smoke in the spotlights and other light sources. You also see that kind of smoke in shows ...
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30 views

Electrolytes for Anodization at Home

I'm looking into anodization, and all the people doing it seem to have sulfuric acid as their first choice electrolyte, while others use sodium metabisulfate. Having simple access to exactly neither ...
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1answer
725 views

Why does boiled water have a different taste as compared to cool water? [closed]

I have noticed it frequently and decided to check with some of my peers and friends about this and they too have felt such a thing. The taste comparison occurs after the boiled water is cooled down to ...
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2answers
104 views

Simple every-day-item hydrometer for distinguishing regular soda and diet sodas

When ordering a diet soda (no sugar soda) in a cafe or restaurant I would like to be sure I am getting a diet soda and not a regular sugar-infested soda. Because a regular soda, is through all the ...
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1answer
66 views

Isotopes and elements [closed]

this is a gold bar. If we look at its structure, will we see that there are atoms that have a different number of neutrons (aka isotopes) (as far as I'm concerned, an isotope is an atom with a ...
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38 views

Why chemicals bottles (plastic) have paper seals?

I have my film developer and fixer in the plastic bottles, also I have glycerine and propylene glycol. They all have paper seals (in caps) that those chemicals get wet and destroy - they just fell ...
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4answers
735 views

accurate measurement from inaccurate tools [closed]

It is a very general question. Is there a good way to systematically increase the accuracy and precision of a measuring tool using only mathematical means? For example, average 10 measurements can ...
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3answers
83 views

Was it CO2 or Muriatic Acid?

We had a malfunction with the chlorination system at our pool. There was a reaction between the Calcium Hypochlorite tablets and either $\ce{CO2}$, Carbonic Acid, or Muriatic Acid. There was a ...
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anionic surfactants as salt water induced rust inhibitors

There are a multitude of product that purport to protect boat engines from the adverse effects of salt water. These anionic surfactants claim to rinse away salt buildup. I do not understand how a ...
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26 views

Supplement weight by element or compound

When a vitamin or supplement claims, for example, that it contains 600 mg of calcium (as calcium carbonate) what does that mean? Does each tablet contain 600 milligrams of the element calcium? Or ...
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How to remove the foggy discoloration in polycarbonate tubes caused by acetone?

Unknowing that the tubes used in the centrifuge are made of polycarbonate, I cleaned them with acetone. Following, a white smoky discolouration appeared and the tubes turned opaque. Is there any way ...
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1answer
49 views

Emulsifier for water, been oil [closed]

I am trying to blend neem oil and water and I'm wondering what the best emulsifier would be 10% neem oil 90% water thank you
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1answer
2k views

Will charcoal briquettes (not activated) absorb water out of the air in the house in a subtropical climate?

I live in Florida, an incredibly wet environment where it's very difficult to get moisture out of house without using a dehumidifier 24/7, which is too expensive. Would charcoal briquettes be of any ...
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3answers
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Why is it considered acid rain with pH <5.6?

I recently read in a book that rain is considered acid rain if the pH falls below 5.6. However a substance is acidic when the pH is below 7; so why is the boundary for acid rain 5.6? I was thinking ...
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1answer
388 views

Reaction of sulphur with calcium carbonate

Can sulphur react with calcium carbonate to form sulphur trioxide and calcium carbide, as the energy of 3(S=O) is greater than ((C=O) +2(C-O))? EDIT: i forgot to say that this is in an oxygen-free ...
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1answer
44 views

Dissolvant for the black spots around the rear mirror of the front window of my car

I make pictures for Mapillary. I would like to place my dashcam as high as possible, but those black spots get in the way. Scraping them off does not work. But I can feel their relief. If no one has ...
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1answer
52 views

What ratio of bicarb to sugarcane juice with a pH level of 4.5-5.5 to neutralize pH level? [closed]

I am thinking of adding baking soda to sugarcane juice to eliminate the fruity acid that is present. The pH of sugarcane juice ranges from 4.5-5.5. I wonder how much baking soda should I incorporate ...
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1answer
1k views

Producing soap from sodium carbonate and oil

Can we get soap by mixing $\ce{Na2CO3}$ from seaweeds with oil? I am not good at chemistry and saw this in the anime Dr. Stone. I just want to know if it is true or not.
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326 views

Non-chlorine bleach vs. hydrogen peroxide 3% soln from pharmacy: Disinfecting gravity water filter system

I'm seeking to disinfect a Platypus gravity water filter made with hollow fibers. My main concern is to address any mold / mildew that may have developed inside the hollow fiber filter due to long ...
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30 views

what does the mixture between urine and dishwater cause? [closed]

I have built an rv from a short school bus. I ran a hose from the "toilet" to a tank in the back to drain the toilet. We wash our dishes in a basin on the counter and dump the dishwater into the ...
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1answer
54 views

Reverse washing soda buildup on stainless steel

In a home brewing project, I use washing soda (Na2CO3) to remove labels and glue from previously used bottles. In doing this, my flip-top bottles (which have a stainless steel flip top arm) often get ...
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75 views

Are there any gases that can not be turned into liquid, or liquids that can not be frozen solid?

My son points out that some solids can not be melted (because they combust, for example). He wonders if there are any liquids that can not be frozen, or gases that can not be liquified.
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1answer
57 views

Is there any bad side effects for using calcium chloride to replace a running dehumidifier?

My dehumidifier costs to much to run, so I’m thinking about using calcium chloride to keep my basement dry(er) ALSO, this may keep my mouse problem to a minimum... my questions are -Will this be ...
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1answer
70 views

Can we tell if a compound is explosive by just looking at its chemical structure?

If I showed you a compound's chemical structure will you be able to tell if it can be used as an explosive or we can only know that by conducting chemical experiments?
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2answers
858 views

Potassium carbonate vs. Potassium hydroxide in Wood Ash

I'm trying to get more concrete information about the chemical process of creating soap from wood ash. What I’m confused about: Many soap-making materials say that you create potassium hydroxide ...
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1answer
68 views

How to oxidize tantalum? [closed]

I am interested in learning how to oxidize tantalum. I have seen some tantalum rings that the sellers say is a permanent smokey blackish color. But I've spoken to some people that say tantalum cannot ...
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1answer
162 views

Polyethylene glycol [closed]

I used a product on my family containing 90 percent Polyethylene glycol. Now I’m reading how Polyethylene glycol can be contaminated with ethylene oxide and also the lower the weight the higher the ...
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297 views

About Smoke Grenades and Sugar Rockets

The most common formula for smoke grenades and sugar rocket fuel is $60\%\ \ce{KNO3}$ (potassium nitrate) and $40\%\ \ce{C12H22O11}$ (sugar). This is a 3:2 ratio, but I've also seen 2:1 and 5:3 with ...
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1answer
57 views

How can I figure out if my store bought chlorine is the percentage it says it is?

Chlorine is an important part of maintaining any pool. I've read horror stories of people buying chlorine from pool stores or big box stores and the chlorine being ineffective. If stored long enough ...
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46 views

natural staining on wood from human skin

I have a question about the dark staining that occurs on my wooden spectacle frames where they rub constantly with my skin around the ears and nose. Can anyone tell me what is causing this? And could ...
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3answers
648 views

How dangerous is superglue? [closed]

A long time ago, when I used to make plastic models with glue, I never wore white gloves when gluing together the pieces, so I often got a lot of superglue on my hands. The superglue, which was very ...
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2answers
1k views

How to dissolve calcium sulfate fast?

I would like to dissolve $\ce{CaSO4}$ in a hardened condition (e.g. gypsum board) as fast as possible. I have seen in posts about $\ce{CaSO3}$ that vinegar and sulfamic acid are able to dissolve it. ...
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3answers
2k views

How much salt (or any other substance one can find in a kitchen) do I need to add to make water boil at 104 °C?

I've seen some formulas around in other questions and Google searches, but my chemistry is pretty much dead so I have no clue where to find the relevant values to calculate it myself. I just need to ...
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1answer
83 views

Why is the pH level of carbonation loss decreasing then increases afterwards?

We have done an experiment of the titration of unsealed sprite soda to find the amount of carbonic acid being loss on various duration (0 to 1 hour), due to decrease pressure. The calculation was to ...
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0answers
2k views

Why do nitrile gloves turn yellow from sweaty hands?

When I take off my nitrile gloves after some hours in the lab, the inside of them has turned yellow. This happens especially in the regions around joints. I suspect this is due to a reaction between ...

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