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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8 views

Krazy glue (cyanoacrylate) and methyl acetate, gas produced?

I added a nail polish remover substitute (main ingredients: methyl acetate, isopropyl myristate) to krazy glue (cyanoacrylate) that was stuck on a surface of painted metal (and some plastic parts). It ...
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1answer
33 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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Is Long Term Preservation of Acrylic Possible?

Is there anything that could be done to preserve/stabilize acrylic objects on long-term timescales or is decomposition inevitable?
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1answer
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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
89 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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Why did my sourdough starter that began at a pH of 5 go down to a pH of 3 but then rise again to 4

For a science assessment I am looking at the effect yeast has on a sourdough starters pH over time. In my results I have noticed that out of the 8 tests I conducted 4 of them went from a pH of 5 (the ...
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1answer
36 views

What can keep moisture out? [closed]

My team and I are working on our senior capstone project and is looking for someone with knowledge in chemistry or engineering to assist us business students. Could you recommend any material that ...
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45 views

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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2answers
870 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
40 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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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
701 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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1answer
63 views

Why sulfonate of detergent is less likely to bind to ions present in hard water than carboxylate?

I was reading about why detergents do not form scum with hard water but soaps do, and according to wikepedia it has to do something with electrostatic interaction of sulfonates( most commonly) with ...
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1answer
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Do baking soda or vinegar reduce toxicity? [closed]

Both baking soda and vinegar can be used to remove cigarette odor from cloth and surfaces, at least temporarily. Do they reduce toxicity of the third hand cigarette smoke too or just 'hide' the smell?
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Why wouldn't a standard addition fluorometric method return the same starting concentration of a solution used to make the standards?

I am trying out a new standard addition method and having some very basic problems. I am hoping someone could point me in the right direction. I am using a fluorometric method to quantify ammonium in ...
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I stored CaCO3 in a PET container and it went through the plastic and made the container brittle. What is the reaction? [closed]

I stored CaCO3 in a PET container and it went through the plastic and made the container brittle. What is the reaction ? It also accumulate on the outside of other PET containers and made them brittle....
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why should we add the fat slowly when making an emulsion?

I'm sorry if this is in the wrong place but recently I realized that every time I got told to make an emulsion even when cooking (ie making mayo or cake batter) it is instructed to add the fat (or ...
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Are oxides of sulphur and carbon adsorbed into limestone/marble?

Oxides of sulphur and carbon are commonly present in the atmostphere in areas close to industries, can such oxides get adsorbed into the surface of limestone and marble and cause discolouration and ...
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Action of Fuller's Earth on Marble and Limestone

Using Fuller's earth is a very common and harmless way to treat marble and limestone that has been damaged/corroded by atmostpheric pollutants such as PM2.5/PM10 carbon particles (Soot) , Oxides of ...
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2answers
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Does 3% hydrogen peroxide neutralize household bleach?

Wiki and lots of sources all say the same thing. "1 part of 3% hydrogen peroxide to 10 parts water". But I am not trying to neutralize water I want to neutralize laundry bleach. It could ...
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1answer
36 views

How to dissolve brass surrounded by aluminium?

I have a broken off brass needle stuck in a caste aluminum hole. (It’s the pilot mixture jet on a carburetor). I was wondering if there was a chemical that would dissolve the brass while not reacting ...
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Why does the application of external mechanical pressure increase the performance of lithium-ion batteries?

Many electric vehicle batteries - specifically lithium-ion ones considered for this query - can be subjected to external mechanical pressure because it increases battery performance. What components ...
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What is the rate constant k for the reaction between potassium manganate and oxalic acid?

For my school's chemistry classes, I am investigating the kinetics of the redox reaction between $\ce{K2MnO4}$ and $\ce{C2H2O4}$. I analyzed the data using a colorimeter set to $\pu{565nm}$. ...
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26 views

What are the common procedures for viewing suspensions of volatile organic compounds under an optical microscope?

I am looking to measure a mixture of triethylamine and water in a micro-Raman instrument. This involves placing the sample under an optical microscope. The "default" sample preparation is to ...
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Why is NaCl so abundant in the ocean [closed]

Why is sodium chloride far and away the most abundant salt dissolved in ocean water. Its two constituent ions do have a very high frequency in the crust of the earth but they are far from the most ...
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2answers
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Hydrogen Peroxide & Vinegar Film reversal, can someone help me understand this reaction?

I'm interested in DIY photo development and I came across a reversal process that uses chemicals easily available at the grocery store. The purpose of a reversal process is to take a partially ...
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3answers
2k views

Why is milk not sold in food-grade stainless steel bottles? [closed]

I have grown up in a country where milk is stored in a steel container in the fridge at home. That’s what makes me wonder why milk is not sold that way? Nowadays the steel container single wall is ...
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1answer
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Is it possible to make Dipotassium Phosphate from Mono-potassium phosphate and potassium hydroxide?

Having fertilizer formulated and asked for 100% Dipotassium phosphate, the formulator says its reacting mono-potassium phosphate with potassium hydroxide to make it. Just wanted to double check and ...
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Can color-changing leuco dyes be used to indicate when a certain molecule binds to another in a textile fabric?

Thermochromic leuco dyes change color when the temperature changes. I want to use leuco dyes to make a color-changing fabric. However, instead of using temperature to induce color changes, I want the ...
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43 views

The pH of tap water changes with time [closed]

My following questions are related to $\mathrm{pH}$ values in irrigation water in plants. I got a $\mathrm{pH}$ meter and I am measuring the tap water and I get an value about 8. My first question: ...
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60 views

Does burning plastic completely disintegrate it? Accidentally melted some plastic in a BBQ, wondering if pyrolytic cleaning is an option

I accidentally barbecued some plastic today, making quite a mess. It's a cushion for a lawn chair, so I imagine probably some sort of plastic or polyurethane. Rather than cleaning melted plastic ...
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2answers
149 views

Alcohol (ethanol) distillation: mystery congener

I regularly home-distil small amounts of potable alcohol (ethanol), mainly from fermented sugar(s) solutions (the 'wash'). My still is a box standard, $4.5\mathrm{L}$ electrically heated (safety!), ...
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2answers
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A solution is cloudy at lower concentration and becomes clear at higher concentration. Why?

This might be just an "everyday life science" question. I am a university professor but not in Chemistry so please educate me. Today I was adding some floor cleaner formula to water as ...
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1answer
46 views

Hair styling gels and 'liquid gels' - effect of formulation / composition on viscosity and performance [closed]

[Disclaimer: I am aware that this is a very 'first-world problem', 'light-hearted' kind of question, given the health crisis we are still going through. Just to avoid offending anyone, here's an easy ...
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1answer
26 views

Is there a practical re-use value gained by grinding up activated carbon that is spent/saturated?

I want to buy bulk activated carbon for use in a DIY air-filtration set-up, like this, to improve air quality in my bedroom. From what I understand, the relatively larger sizes of carbon media on the ...
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About the acidity of Sultiame [closed]

Why is sulthiam base even hough sulfur can accept the electron by resonance from nitrogen like carbonyl group do?
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45 views

About the acidity of phenytoin

Can you explain why phenitoin is weak acid even though nitrogen is base? Does carbonyl group always make structure acid? If this structure doesn't have carbonyl group, would it be base not acid?
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1answer
35 views

Calculate half-life from decay [closed]

I need to calculate the half-life in hours and I got the decay constant in min, how do I do? Which formula do I use? Is it just ln2/decay constant in minutes?
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1answer
100 views

Oxygen manufacturing on Mars

I was reading about the Perseverance lander on Mars and was surprised to find that it has an oxygen manufacturing instrument on board. The oxygen is needed as a part of a binary rocket fuel to get ...
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1answer
92 views

Turning oil into solid for candles [closed]

I added stearic acid to hot vegetable oil and saw it turned to a sludgy, slush material in about 1.5 hours. Is there any other natural additive that I can add to make it more solid in the same amount ...
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1answer
82 views

Zinc screw turning black [closed]

I tried one experiment. I started with ordinal yellow zinc screws. The screws were sumberged in bath of two parts of $4.7\%$ solution of $\ce{NaClO}$ and one part $\ce{NaOH}$. The screws turned ...
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0answers
346 views

properties of solution [duplicate]

I had homework with the following question, Eugenol is the active ingredient in the oil of cloves used to relieve toothache. Calculate the boiling point of a solution in which 0.17 grams of eugenol, (...
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1answer
27 views

Diffusion of multiple gases at once

Graham’s law of diffusion states the rate of diffusion between two gases is inversely proportional to their molar masses. Now, this is helpful when we are focused on two gases. But that is rarely the ...
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22 views

Substances with high physical expansive property/expansion after reaction

I want to know if there is a substance/mixture of substances that expands more on some chemical or physical change, than what I've already seen. Elephant toothpaste is a good example, a small amount ...
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1answer
65 views

Why is chloride measurment 0 [closed]

In class we did an experiment to measure chloride in different water sources, including a lake. We used Ion-selective electrode of Ag/AgCl technique. We did the calibration curve and all steps and ...
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0answers
59 views

Hydrogen peroxide on damp clothes left out in the sun [duplicate]

Somebody told me that sunlight is a good bleach for clothes because leaving damp clothes outside in the sunlight will turn some of the water into hydrogen peroxide. Is this true. If yes, then why can'...
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0answers
23 views

Glycerin yield upon saponification of beeswax

I am making a custom grease (castor oil & sodium stearate) that will be suspended in beeswax. I have found that saponifying some beeswax for use in the grease results in higher operating ...
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1answer
32 views

What is left over when water and sodium hypochorate decompose, i.e. household bleach? [duplicate]

I am having some confusion in understanding the decompostion of household bleach. One website says bleach decomposes to salt and sodium chlorate, simple enough. Orther wedsites say bleach decomposes ...
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1answer
2k views

Why do green bell peppers become bitter when cooked?

Why do green bell peppers taste sweet raw, but become bitter when cooked (steamed)? What chemical process is responsible for this? (I don't believe the temperatures are high enough for the Maillard ...
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0answers
29 views

Exceeding CPVC in exterior roof coatings

We have a kynar coated metal roof that was primed with an acrylic primer and then coated with a dark blue acrylic elastomeric paint. It was coated during spring with moderate weather. The roof ...

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