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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Why graphite(pencil marks) are visible on paper since, each layer is bonded with van der waal force? [duplicate]

If each layer of graphite is bonded with a van der waal force so when we write with a pencil on a paper only one layer needs to sticks with paper but it is more than one as we know graphene is not ...
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Acetone stains on plastic

I tried to erase white paint scratches with nail polish remover (containing acetone) in the inside body of a ps5, under the plates, but it left a cloudy mark around where they were. Is there a way to ...
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1answer
59 views

Calculating Enthalpy of formation versus Calculating Enthalpy of a reaction not occurring at standard conditions

My understanding of Hess's law and its use in determining the change of enthalpy of a reaction has been challenged recently. Up until recently, I thought that the only way to calculate a chemical ...
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36 views

Does lithium grease damage plastics such as ABS & PBT?

I have read that petroleum-based greases damage plastics due to the petroleum-derived nature of most plastics. However, I have seen lithium grease being used in electronics such as the gears in CD ...
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1answer
53 views

How does soap help in cleaning clothes and rinsing off oil and grease?

When we say that we agitate clothes so that grease particles get separate out from clothes as ionic part of hydrocarbon chains of soap is attached to water and non polar part of chain is dissolved in ...
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1answer
47 views

Mechanism of successively melting ice with table salt [closed]

Hi I was reading about how regular sodium chloride in itself can melt ice outside, for example ice on roads during low temperatures. However, I am unsure about the exact details, as I have found some ...
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2answers
80 views

What sort of chemical would require a school to be evacuated? [closed]

I am doing research for a fictional story. I want to create an accident which would force students to be evacuated from a school. Is there a type of chemical spill that might take place in a chemistry ...
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1answer
33 views

Can large, sticky, sodium polyacrylate crystals be coated in a powder to facilitate handling?

I am separating a larger container of sodium polyacrylate crystals into smaller containers for student experiments. Commonly known as "Deco Cubes" and used by florists in decorations and ...
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Is shampoo or soap a better emulsifier? [closed]

Made homemade shampoo using: Sodium lauryl sulfate (SLS) Glycerin 95% ethanol Sodium stearate Made homemade soap using: 20% sodium hydroxide Vegetable oil 95% ethanol 20% sodium chloride ...
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1answer
28 views

Removing bugs and tar from my car with Bounce fabric softener sheets

I just used Bounce fabric softener moistened with water to remove stuck tar and dried bugs from my car. It worked like a charm, wiping it clean in seconds. Why did this work? The web says it ...
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3answers
677 views

Smell produced in reaction of sodium hydroxide and aluminium

I was doing an experiment with $\ce{NaOH}$ dissolved in some $\ce{H2O}$ and aluminium. My textbook says that the following reaction takes place $$\ce{2 NaOH + 2 H2O + 2 Al -> 2 NaAlO2 + 3 H2}$$ It ...
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What is the difference between PEF and PTF bioplastics?

I am trying to research single use plastics replacements, and wanted to explain how PEF and PTF are a good choice. Although as I am researching I can't find clear information about them, also how they ...
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1answer
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Where are the C and H atoms in 1,3,3,3-Tetrafluoropropene? [closed]

I'm learning about refrigerants, and one refrigerant is R-1234ze, otherwise known as 1,3,3,3-Tetrafluoropropene. On Wikipedia, it says that the chemical formula is $\ce{C_3H_2F_4}$. But, Wikipedia ...
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1answer
358 views

Fluorine detection in organic compounds

Many of you will know why I am asking this question. There is a lot of attention recently to the dangers of the so called Perfluoroalkyl and Polyfluoroalkyl Substances (PFAS). In essence organic ...
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1answer
103 views

Why are holes appearing in this aluminum kitchen foil on my radiator?

I thought I would try to deal with dehumidified air from radiators by filling simple troughs of water placed on the top, which in theory would evaporate water as the radiator heated the air. I crafted ...
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1answer
32 views

Is a diluted aqueous solution of sodium hypochlorite more stable than a concentrated solution, all else being equal?

On the Clorox website, they recommend that you dilute bleach (NaOCl) in water prior to use for disinfection. They say that you should make a fresh solution each time you need to use it, adding: “Don’t ...
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3answers
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Does smoking drugs degrade them?

Why doesn't smoking a drug degrade or destroy it? A wide variety of psychoactive compounds ("drugs") are commonly consumed via smoking – e.g., nicotine, THC, amphetamines, cocaine, DMT. But ...
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1answer
46 views

Why do we clarify water with alum, but beer/cider/wine with bentonite?

My understanding of clarifying (floccing) liquids is that we add a mineral with an electric charge, which attracts suspended particles (like bacteria) which I assume have the opposite charge. The ...
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3answers
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Can gases float on each other?

So I want to know do gases have the same concept as water and oil ? Like if I put some hydrogen and helium in a room with 0% air will they float on each other like the hydrogen go down and the helium ...
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1answer
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Why measure both alkalinity and pH in pools if pH alone tells us how acidic or basic something is?

I am trying to better understand the chemistry of maintaining my pool so that I can use the least amount of chemicals to control algae growth and I'm confused by the need to measure both total ...
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Can a damaged neoprene (polychloropren) or rubber coating be cured (hardened) using a hot air gun and a curing agent?

Polymers can be hardened by a process known as vulcanization (curing of elastomers), a chemical process that involves a curing agent and heat. According to Wikipedia, for the vulcanization of rubber, ...
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Hazards of eating non-stick coating, particularly considering the coating primer [closed]

How unhealthy are teflon / non-stick coating chips that end up eaten? What role does the primer coating play? Existing similar threads that don't go into enough detail: 1, 2 I understand that there is ...
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2answers
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Cation and anion bond [closed]

I'm new to chemistry still in a sense - I'm doing AP chemistry and the stuff we learnt in school left a lot of gaps that would have made understanding and grasping the concepts much easer if they had ...
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2answers
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Poisoned Kitchen Sink? [closed]

I wonder…I have a 20 years old stainless kitchen sink in good condition. “Somebody” poured “Green Gobbler” into the sink. Green Gobbler is a Drain Clog Disolver (supposed to be kitchen sink safe and ...
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1answer
102 views

Why is Denaturated alcohol made poisonous? [closed]

I understand the need to denaturate alcohol, as to have a material that can be used for non-food products without the heavy alcohol beverage tax. So, adding a foul tasting bitter substance like ...
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Can hydrogen peroxide dissolve rust?

wd-40's "help page" on "How To Loosen Rusty Bolts, Screws And Nuts" states: Hydrogen peroxide can dissolve rust. Applying hydrogen peroxide to the fasteners and letting it sit is ...
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1answer
233 views

How to safely ship 5 litre container of liquid chemicals into glove box?

I need to transfer a 5 litre container of oxygen sensitive liquid chemicals within an inert atmosphere to smaller 100ml bottles. I'm going to do so using a vacuum glove box purged with nitrogen. I ...
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1answer
83 views

What burns my nose? [closed]

I have a buddy that, lately, has amused himself by blasting a lit JetBoil (camping stove with isobutane/propane mix) with a can of Dust-Off compressed air, to create a giant sheet of flame. The fumes ...
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1answer
54 views

Storage solution for oxygen sensitive liquid chemicals?

I'm needing to transfer oxygen sensitive liquid chemicals from a 5 litre bottle to many 100ml storage solutions. Since I'm transferring a large quantity I plan on operating within an inert atmosphere ...
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Dry ice sublimation rate in water

As I got some a finger sized of dry ice in water, it started to bubble vigorously as expected and gave off a lot of smoke. But after 3 minutes or so, the rate of sublimation seems to slow down a lot, ...
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1answer
59 views

Determining ppm concentrations from food label information for ICP-OES analysis?

Overview: I am looking to determine what ppm values of trace metals are present in a particular formula while considering digestion, dilution, and detection limits for ICP-OES. For example, one ...
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1answer
98 views

How can I dissolve carbon using generally available substances? [closed]

I am asking this question out of despair: my wife burned to death crèpes dough into our induction stove. I tried all usual products (the ones to clean the stove, vinegar, then sodium bicarbonate left ...
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2answers
131 views

Peak in beer freezing temperature plot

I left an open beer in the freezer while monitoring its temperature. The first minutes works as expected. But after the plateau, at about −8 °C, a peak appeared: I thought it was an artefact because ...
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Best practices to obtain small quantity of sealed solution without oxidising entire solution?

I'm ordering liquid based chemicals which only come in large bulk quantities. These solutions have a shelf life of approximately 2 years unopened, but 2 - 3 weeks once opened and oxidation kicks in. ...
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2answers
118 views

What is the difference between mole and molar mass?

In my book it says 1 mole of carbon =1gram atom of carbon =12 gram if I see this relation that seems to me that 1 mole is mass of an atom In grams. But molar mass is different and why we use for ...
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2answers
85 views

Is it possible to find Molarity from the number of moles and density of solution?

Lets say we have the following data: Number of moles of NaCl = 3; Density of NaCl solution = 1.25g/L; Find molarity... Molarity = No. of moles of solute/ volume of solution in L we've been given the ...
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1answer
71 views

Need good aproximation to the atomic composition of late 1980's expanded polystyrene foam

I'm not a chemist and what little I know about expanded polystyrene (EPS) foam has been found by looking at articles on the internet. At work I need an approximation to the atomic composition (at %) ...
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36 views

How to prepare an emulsion (compounds in wt%)

I am trying to replicate an experiment to generate microparticles but I found myself confused about how to prepare the ingredients as some need to be weighed and dissolved before and I think the ...
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Parameters of NaHCO3 + citric acid + H2O + NaCl mixture potentially impacting functional efficacy in pest control application?

I have been searching for infomation on this application, but have some specific questions that I have not seen directly addressed in the Google/Stack Exchange posts I've come across thus far; below ...
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84 views

Why don't ant bites kill us?

So, methanol is supposed to be toxic even in minute quantities because it is oxidised in our body to methanal and then methanoic acid. This can cause blindness and even death. Interestingly, ants ...
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1answer
43 views

How would you test for ppm of lead in a powder?

Looking to test the ppm for lead in a powder that is a food item. No experience in chemistry. Possibly may need to test for other heavy metals.
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1answer
633 views

How much CO2 is produced when burning 1GJ of Natural Gas

Background I am trying to determine how many kg of $\ce{CO2}$ are released when burning 1 GJ of natural gas. What I've tried I have very little chemistry knowledge, but google led me to these two ...
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1answer
42 views

Questions about molar ratio

I am new to chemistry so this might be about a very easy concept that I might be misunderstanding but I would appreciate your help! I watched a video of combining hydrogen and oxygen and forming water....
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1answer
55 views

How Bread is made with yeast, sugar and luke warm milk? [closed]

Materials and Apparatus: wheat flour sugar dry yeast glass bowl covering plate milk Procedure: Lukewarm milk is taken in the glass bowl and sugar is added to it. Then, yeast is added to the same. ...
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1answer
747 views

Why do purple Pedialyte freezer pops turn green when frozen?

I bought some Pedialyte freezer pops for my kids: And I've noticed that after spending a long enough time in the freezer, the purple "grape" pops change color from purple to green: After ...
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Hazardousness of Chlorothalonil & metabolites in shower water? [closed]

Recently it came out, that in some parts of Switzerland (where I live), there is Chlorothalonil & metabolites/breakdown-products of it in the drinking water. Yikes. Problem is, chlorothalonil ...
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900 views

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 ...
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1answer
76 views

What can i safely use to remove grease and dirt from plastic (Polycarbonate, Polyethylene, Polystyrene and ABS)?

I need advice of how to clean plastic without produce cracks and white haze on them in plastic, exactly in: -Polycarbonate -Polyethylene -Polystyrene -ABS Basically the materials of optical media (CD, ...
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0answers
71 views

I have tried to remove oxidation from a metal scraper using vinegar, now the metal looks and smells burnt, what went wrong?

I have recently tried to remove some oxidation from a metal scraper spatula by using vinegar. After leaving it there for a couple of hours I was left with a burnt smell (with a hint of burnt candle ...
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1answer
775 views

Is powdered acid dangerous? [closed]

I was told that an acid is only dangerous because it releases $\ce{H+}$ ions when in contact with water. Therefore, powdered acid should be completely safe on skin provided that your skin is not ...

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