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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5
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1answer
30k views

why does milk of magnesia have an expiration date?

I noticed an old bottle of milk of magnesia in my refrigerator and saw that it had an expiration date printed: January 2015. Checking the ingredients, I saw only three: magnesium hydroxide, purified ...
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0answers
24 views

Baking Soda and Vinegar: Are there any secondary reactions?

I want to run a Lego Pneumatic Engine on the CO2 that is produced, but before I do, I want to be sure that that's the ONLY gaseous product from a real-world reaction. Everyone seems to assume that it ...
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2answers
652 views

How is octane rating defined for negative values and those over 100?

Based on my reading, the octane rating for a given fuel is calculated by finding the compression ratio at which it knocks and finding a mixture of $X\%$ isooctane and $(100 - X)\%$ n-heptane which ...
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2answers
22 views

What is the difference between enthalpy change and energy change?

This question seems really dumb but I rather be safe than sorry. I read about enthalpy change in my chemistry textbook which defines enthalpy change as the energy exchange between a chemical reaction ...
5
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1answer
6k views

Does citric acid react with carbonated water?

I've noticed that when adding lemon juice to carbonated water, large 'soapy' bubbles appear on the surface. Since I'm adding another acid to a solution of carbonic acid, I would maybe expect a faster ...
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4answers
917 views

What exactly happens while washing clothes

I am reading about soaps , micelles and all that. I understand how soap behaves in water contaminated by oil. Soap helps in emulsifying the oil into water. Let us suppose now we have dirt(i.e oil, ...
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1answer
25 views

ZnO ink viscosity

I have stumbled upon the below instructions on how to create ZnO nanoparticules: https://www.google.com/amp/s/ninithi.wordpress.com/2015/08/06/make-your-own-photocatalytic-zinc-oxide-nanoparticles-a-...
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24 views

Lowering the freezing point of a lipid by adding another lipid

I'm trying to stop bacon grease from congealing in the fridge by adding another lipid with a lower freeze point to it, but I'm not sure how much to add, as I'd like to keep the ratio as bacon-grease ...
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1answer
62 views

The effects of acetic acid on porous concrete brick and mortar joints for someone who has no understanding of chemistry

I mistakenly applied a patio cleaner containing acetic acid to my porous concrete facing brick thinking it was biocide. The concentrate solution has a ph of 3 and I diluted it to one part concentrate ...
7
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1answer
645 views

Does motor oil get more viscous when heated & what is the meaning of the SAE motor oil code?

The motor oil in my 2004 Pontiac Vibe is 5W-30. My (incorrect) understanding of this SAE nomenclature is that 5W means "Viscosity index of 5 in the winter" (or when really cold - like $\pu{-30 ^\...
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1answer
12k views

How to remove formaldehyde (smell) from clothes/jeans?

Bought several jeans, then to discover they have a really nauseating smell, that is not removed by washing. Reckon it's formaldehyde, from what I can read. Anyway, assuming you have jeans with ...
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i need to find a compound/material/fibre which is fire resistant (atleast 500 °C or or 1000 F), washable and cheap [closed]

I'm a High school student in a commerce stream, i.e. I've no relation whatsoever to chemistry (or science for that matter). I've been studying inorganic chemistry for the past 9 months as a personal ...
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1answer
34 views

What would weigh more? A ice cube or water, if the ice cube is from the same amount of water [closed]

So if I frozen 50 ML of water, it turns into ice cube. Would the ice cube weigh the same as the 50 ML of water it was before?
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1answer
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Black Smoke Produced from Regular Lighter but Not Torch Lighter Applied to Copper

I have a piece of copper mesh from which I would like to remove all coatings/oils. The copper comes from a pot scrubber like this. In order to remove any residue, I held a standard bic lighter up to ...
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1answer
69 views

Is C4O5 possible?

I have searched all over the internet and I have found no specific answer. I just want to know if C4O5 is possible and what would it be called.
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0answers
27 views

Why And How are Unbranched chains of hydrocarbons easily biodegraded?

My chemistry textbook says If detergents are highly branched then they can't be easily degraded by bacteria.So,nowadays the branching of hydrocarbon chain is controlled and kept to a minimum. Upon ...
3
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1answer
327 views

What ratio of 73% calcium hypochlorite powder to water mimics the strength of sodium hypochlorite (bleach)? [closed]

Calcium hypochlorite is sold as pool shock in varying strengths. I've read that it can be dissolved in water to create a 'bleach' (typically sodium hydrochloric or sodium hydroxide) and is often used ...
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1answer
1k views

Why does hot water eventually turn cold, and why does cold water eventually turn hot?

I get cold water from my tap and put it in my water bottle. Over the day as I drink it, the water looses it coldness and slowly becomes warmer. On the other hand, if I get hot water (maybe I'm sick ...
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2answers
84 views

Why is HCl the acid of choice for swimming pools?

Why is muriatic acid the go to acid to put into pools? Does it work better than nitric acid, sulfuric acid, or another strong acid? I mean they all will add the same amount of H+ right? Note, we use ...
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0answers
17 views

Conversition calculation:unit involving two types of measurement [duplicate]

A certain chemical process consumes water at a rate of 55 Ls−1. Express this water consumption rate in the following units. a. Lh−1 b. kLs−1 c. dLmin−1 d. mLday−1 I did a and b correctly but I ...
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2answers
43 views

What are chemical bonds made of, and how do they form? [duplicate]

All atoms are linked together by chemical bonds, but what are the bonds themselves made of? I'm sorry that's a stupid question, but I'm only 14, and haven't entered high school yet, and my science ...
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0answers
53 views

Is there an adhesive that is not dissolved by acetone?

I am trying to glue glass sheets together to make a sealed 13" x 13" x 13" box. Inside this box there would be acetone gas used to melt 3D printed parts to make them more durable. Acetone will remove ...
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36 views

Products of stainless steel and acetic acid reaction

I left a stainless steel knife in "cleaning vinegar" for a few days (a ~30% acetic acid solution, which also contains an unknown quantity of an "edible salt") (sorry about the vagueness – this is ...
2
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1answer
92 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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0answers
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What is chlorophyll and what makes it? [duplicate]

I have been wondering what chlorophyll is for a while. Then I figured it out! Now I am wondering what makes chlorophyll. I have done a lot of reasearch but I never found any information. Please tell ...
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1answer
35 views

if we mix bleaching powder in water will this be converted to Sodium Hypochlorite? [closed]

if we mix bleaching powder in water will this be converted to Sodium Hypochlorite ?
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1answer
70 views

Is bleaching powder same as Sodium Hypochlorite? [closed]

i want to know is Sodium Hypochlorite is same as bleaching powder. can some one please let me know.
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0answers
13 views

Wood impregnation and water glass

I'm not a chemist, and may have a very odd/stupid question. I was asking myself how to better treat wood to be more weather resilient and harder to wear by also keeping at least some of its original ...
5
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2answers
485 views

What chemical should I use to thin UV cure epoxy?

The epoxy that I am working with is UV curable with a cycloaliphatic epoxy resin base. I am trying to reduce the viscosity. Whatever I add to thin the epoxy, it needs to be able to evaporate off so ...
6
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1answer
94 views

Understanding sodium hydroxide drain cleaner's exothermic dissolution of aluminum; does the aluminum need to be oxidized before it dissolves?

I'm not a chemist but I remember that the standard HF/nitric silicon etch used in micro-fabrication supposedly worked in two steps; the HF would dissolve the thin SiO2 oxide layer on the silicon ...
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1answer
50 views

Independant variable for Asprin pill titration with NaOH solution [closed]

I am assigned to do an independently designed chemistry experiment for school. I want to do titration of Aspirin pills with NaOH solution using Phenolphthalein as indicator. I am struggling to find ...
2
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1answer
2k views

Solvents adequate for dissolving overheated polyethylene terephthalate glycol-modified (PETG) residue?

I work in 3D printing. One of the materials we use is polyethylene terephthalate glycol-modified, or PETG. It is a pretty good material, both in strength and appearance. It is melted and pushed ...
2
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1answer
66 views

How to test a sample of cigarette tobacco for its nicotine content?

I was wondering how one would go about testing samples of different cigarette tobaccos for their nicotine content. Is there a kit of some kind available online to do this?
0
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1answer
31 views

If the gaseous molecules didn't have any kinetic energy would the surface of a filled balloon still be firm? [closed]

The most of the ideal gas law equation is based on the fact that the gaseous molecules are moving around and cause collisions and thus have some pressure. If these molecules were to not have any ...
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3answers
3k views

Aluminium foil on windows: what is the residue, and how to remove it?

I put aluminium foil on some windows' glass pane wetted with plain tap water, as a typical trick to stop sunlight. After 5 days, I removed the foil to find some kind of whitish pattern on the glass. ...
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0answers
15 views

Calculate amount of enzyme needed for in vitro phosphorylation?

I have 100 micrograms of STAT1 and its molecular weight is 90 kDa. I calculated the number of moles to be 1 nmoles. The specific activity of JAK1 (the kinase) is 110 nmoles of phosphate per minute per ...
35
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3answers
10k views

Why isn't ethane used for cooking?

We commonly use methane and propane for cooking (and home heating), but not ethane. I would expect ethane to be suitable for this, being in between the two, but I've never heard of anyone using it for ...
2
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1answer
1k views

Why was my soap measured as acidic?

I've always been told soap is basic in pH. A few years back in a high school chemistry class, we measured the pH of various substances with universal pH indicator. We measured some liquid hand soap ...
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2answers
64k views

What causes the really bad smell of rotten potatoes?

Rotten potatoes have a distinctive unpleasant odour, and I can't find any definitive answer as to what the chemical involved is. I was thinking it might be Butyric acid, from the fermentation of the ...
3
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1answer
855 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.
28
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5answers
19k views

Microwaving a glass of water, what happens?

Most of us here would already know the simplified idea behind microwaving food: Microwave radiation hits the water molecules present in food, which excites them and causes 'em to vibrate rapidly in ...
3
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1answer
271 views

Safely lowering bleach pH without chlorine gas?

According to Eurekalert, by lowering the pH of household bleach (e.g., by adding vinegar or citric acid), we can increase $\text{[HOCl]}$ and consequently greatly improve the disinfecting capabilities ...
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2answers
209 views

Frequency of Mpemba Effect [closed]

What are the chances of warm water freezing faster than cold water? (How many percent?) Does it have to do with container size or something in it?
0
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1answer
33 views

How do CO2 Fire extinguishers procure their CO2 [closed]

How do CO2 Fire extinguisher manufacturers get such a large amount of Carbon Dioxide? Do they get it through a chemical reaction or burning hydrocarbons?
2
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1answer
65 views

Chemical equation for the reaction of Allura Red AC with NaClO

I am trying to figure out the chemical formula for the reaction between Allura Red AC and $\ce{NaClO}$ (bleach). I have never met such reactions before in my study, and I was unable or maybe looked in ...
0
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1answer
56 views

Use household ammonia damage aluminum?

I'm sorry if this has already been asked but I could not find it on a search here though I also could not determine how to search for the presence of two words ('ammonia' and 'aluminum') I've read ...
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2answers
9k views

Is bamboo based plastic less likely to leak chemicals?

Some plastics have been known to leak plasticizers (bisphenol and phthalates) into the food they contain, especially when heated. Because such compounds are suspected of being endocrine disruptors it ...
6
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1answer
64k views

Chemicals to clean natural stones

I picked up some stones from a hiking trip. What can I use to thoroughly clean the mud and other hard deposits on the surface of the stones? I have only washed them with plain water.

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