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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Properties of Gases and Gas Law [closed]

A gas occupies a volume of 80.0ml and 630torr. At what temperature in °C would the pressure be 770 torr if the volume remains constant?
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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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Oils that penetrate the Dermis [closed]

Can u provide me with a list of oils that have molecules small enough to penetrate most layers of the dermis. And is sperimidine one of them. All carrier oils need not be listed.
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this is electrorefining. I wonder when reaction is end the concentration will be increase or same from replaced by A+ [closed]

this is electrorefining. I wonder when reaction is end the concentration will be increase or same from replaced by A+
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1answer
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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
55 views

How can I dissolve carbon using generally available substances?

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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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 photo 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 ...
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2answers
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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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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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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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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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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
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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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447 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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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
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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
300 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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2answers
884 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
45 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
730 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
67 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
40 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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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
99 views

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
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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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44 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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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
154 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
117 views

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
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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
28 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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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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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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