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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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50
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2answers
15k views

Why don't we explode after drinking water?

It is known that acid should be added to water and not the opposite because it results in an exothermic reaction. Our stomach contains HCl, so why don't we explode when we drink water?
5
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1answer
2k views

The chemical reaction between lemon juice and polystyrene foam cups

I have noticed that when I have lemon juice on my fingers and I touch a polystyrene foam cup (I will refrain from using the term 'styrofoam'), the cup begins to break down, i.e., melt. I can leave ...
8
votes
5answers
1k views

Is identifying a chemical equivalent to be able to produce it?

This question is a follow up of another thread, where we are discussing Theresa May's accusation of the Russian government which is supposedly behind the recent chemical attack in the UK. Soon after ...
10
votes
1answer
284 views

Why does automotive glass shatter into tiny pieces but glass used in our houses into shards?

Image Source : Bigstockphoto Image source : pinterest The first picture depicts the glass that is found from an accident site, while the second picture depicts the glass that we use in our home. ...
0
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1answer
86 views

Transesterification of vegetable oils to produce biofuels - problems in the lab

I'm an undergraduate doing a small research project on biofuels. I have 12 hours of lab time to investigate something about biofuels. I've chosen to explore how the fatty acid content of different ...
2
votes
1answer
762 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 ...
0
votes
1answer
2k views

Why is helium used in diving apparatus?

In my textbook it said that helium is used in oxygen tanks (diving apparatus) by deep sea divers. When I searched the internet for the reason it said that : A mix of helium and oxygen is used in ...
8
votes
1answer
741 views

What chemical can cause such a fire? [closed]

A friend of mine who thinks that she is under influence of black magic met an astrologer. The astrologer asked her to wear a t-shirt for three nights and then bring that to him. The astrologer then ...
1
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0answers
29 views

Reaction of electromagnetic radiations with the air pollutants [closed]

My friends, who are working on an IoT based technology project, explained their idea to me which is roughly like reducing air pollution by converting pollutants to oxygen ($\ce{O2}$) in any reaction, ...
9
votes
1answer
248 views

Does 95.8% silver tarnish as fast 92.5% silver?

I've been trying to find out whether 95.8% (Britannia silver) would tarnish as fast as 92.5% (Sterling silver)? I haven't been able to find much on tarnish for Britannia silver. Given that both ...
-2
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1answer
124 views

Electron Energy Levels? [closed]

New to chemistry; In my book it talks about electrons in atoms moving from one energy level or shell to another and denotes this by n. How does this exactly happen, do electrons move to different ...
1
vote
1answer
44 views

Why did permanent marker come off of glass after rubbing it with my fingers?

No, my fingers don't look stained but I accidentally made a stroke of permanent marker on glass and I was looking for nail polish remover to use, couldn't find it. So I started rubbing the stroke of ...
0
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3answers
193 views

Question about the Law of Definite Proportions

If we know that: $1g$ of carbon + $1.33g$ of oxygen = carbon monoxide $1g$ of carbon + $2.66g$ of oxygen = carbon dioxide My question is: why is that in the second case where we doubled the amount ...
0
votes
2answers
357 views

Do all decomposition reactions involve heat? [closed]

When water decomposes into Hydrogen and Oxygen as in 2H2O—-> 2H2+O2 does this involve heat? Is it always implied that heat is involved in a decomposition reaction or does this just spontaneously occur?...
1
vote
1answer
2k views

Xylan vs. Teflon for non-stick food pans? [closed]

I am looking at non-stick pans and some are Xylan® others, and most, are Teflon™. What are the chemical differences? What is better for cooking? What is better for health safety? I do know that ...
3
votes
3answers
2k views

What is responsible for the odor of gasoline?

Gasoline as we know it is a blend of combustible hydrocarbons and has a characteristic odor. The natural gas we use to heat our homes and (for some of us) cook our food has its own odor, except... ...
2
votes
1answer
904 views

What is a suitable acid to remove limewash from masonry brick

Diluted Hydrochloric acid is often touted as the only thing to remove limewash from masonry but the process is dangerous and can adversely affect the bricks, color changes can readily occur. Is there ...
0
votes
1answer
100 views

What is the relation between Rate of reaction and rate of consumption of reactants?

The rate of the following reaction is 0.300M/s. What is the relative rate of change of each species in the reaction?$$\ce{A + 3B -> 2C}$$ We are supposed to find A and B and I understand that we ...
2
votes
1answer
94 views

Using drip extraction, how much caffeine is extracted from coffee as a function of the amount of water used?

When using a drip coffee maker, there are basically two choices we make: the amount of water and the amount of coffee grounds. If we use the same amount of coffee grounds but double the water, how ...
3
votes
1answer
93 views

Acetic acid odor while testing CO2 sensor; can it be easily removed, is there a better way?

A friend asked me to help test a hobby-quality $\ce{CO2}$ sensor MG-811 (updated link). It uses a solid electrolyte and should provide a sensitivity of something like -40 mV per decade. I though I'd ...
1
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0answers
87 views

UV-Vis and Polylactid Acid (PLA) [closed]

I am trying to use UV-VIS for a 3D printed ~4mm PLA design. However I keep running into a problem because the polymer is not showing detectable under the UV-VIS. Does anyone have any suggestions that ...
0
votes
1answer
57 views

What is the modern hardware/supermarket term for 'laundry bluing'?

I want to make this amazing paper Crystal Tree with my kids. One of the ingredients is laundry bluing. It is described thus: The magic crystals that are left behind are a combination of the Mrs. ...
1
vote
1answer
329 views

Separating sugar from soda

I want to do a lab with my students in which they will try to prove how much sugar is in a can of coke. I know that distillation is the go-to method for separating out the syrupy sugar mix, but does ...
-1
votes
2answers
2k views

Sodium Chlorite vs. Chlorine Dioxide

I ordered Sodium Chlorite in the mail and received Chlorine Dioxide. Can they be used interchangeably, or are they different? My background in chemistry is limited so laymen's terms would be ...
1
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0answers
48 views

Looking for Desiccants

I am an engineer and not the best at chemistry, I am horrible at it, but I was wondering if it is safe to mix sodium hydroxide and calcium oxide to make a desiccant that also captures carbon monoxide? ...
1
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0answers
117 views

Does alum react with zinc?

I want to remove a hardened steel bolt in a block of zinc (there is a through-hole, so I have two sides to work with). I have done this previously with aluminum and steel before, using a solution of ...
34
votes
4answers
8k views

How are poisons discovered? Does someone have to die/be poisoned from it first?

How are poisons discovered? Does someone have to die/be poisoned from it first? Or are there other ways of discovering the harmfulness of a substance? Perhaps everything is tested on other animals ...
4
votes
1answer
3k views

For what reasons, is isopropyl alcohol widely used as a cleaning solvent?

I have worked in electronics and aeronautics industry 30 years ago, and I have always wondered, what were the specific properties of isopropyl alcohol, which make it used instead of other alcohols ...
-1
votes
1answer
30 views

Silk Amino Acids and Fruit [closed]

Can I mix silk amino acids, bamboo extracts and keratin extracts with fresh organic fruits for a hair treatment?
5
votes
1answer
147 views

What happened to this 10 year old unopened plastic bottle?

A colleague of mine found this unopened Aquarius bottle (non-carbonated drink) that was 10 years past its expiration date. The bottle was collapsed inward which would suggest that the pressure in ...
12
votes
2answers
959 views

Le Chatelier's principle: Are there any exceptions?

The way Le Chatelier's principle is presented in most introductory chemistry books (high-school) is as though it's an indisputable law of the physical world (in the sense that we're never shown an ...
0
votes
1answer
60 views

Residual catalyst leaching from PETE

I am trying to look for healthy options for 5 gallon water jugs. The problem is all the plastic 5 gallon water jugs on the market are either made of #1 PETE (BPA free) or #7 (which contains BPA). It ...
3
votes
0answers
187 views

Coffee and argon/nitrogen [closed]

I’ve recently been experimenting blanketing coffee with argon and nitrogen. I’m finding that argon has a more positive result. I can’t find any data or information that would confirm this other then ...
1
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0answers
34 views

Scent neutralizer

I'm an avid outdoorsman and outdoors photographer. I use a lot of scent neutralizers to help me stay hidden. Buying the store brands get expensive so I found a recipe to make your own. the recipe is 1....
2
votes
1answer
448 views

Why is nitric acid often used to digest any solid sample?

Why is $\ce{HNO3}$ often used to digest any solid sample? I heard many solid samples often digested with $\ce{HNO3}$ solution because nitrate compound always dissolve in water. Is the concept ...
12
votes
2answers
3k views

Why do most drugs (eg: oxycodone) have seemingly arbitrary names?

How do some medicines derive their names? For instance, is the name oxycodone somewhat arbitrary? I am not well-versed in Chemistry (1st semester student) but does the prefix oxy- imply some ...
-1
votes
1answer
1k views

Is it possible to neutralize acids with vinegar (e.g. when experiencing heartburn)?

I would like to know if it is possible to neutralize heartburn with a shot of vinegar, or if one should only use basics (like edible soda). What I know from high school, is that you can neutralize ...
5
votes
2answers
2k views

Does calcium hydroxide react with citric acid in orange juice?

I noticed that calcium-fortified orange juice on the shelf at my local grocery store contains calcium in the form of calcium hydroxide. And I also noticed a couple other ingredients that ordinary ...
-7
votes
1answer
74 views

Chemistry toilet paper [closed]

This is a stupid question, but I can’t find one of the compounds on this toilet paper: I have in order: Salicylic acid Aceton Caffeine ? Urea
3
votes
2answers
96 views

How does % purity on household products work?

For example, toilet bowl cleaner is 9.5% HCl. Does this mean that for every 90.5 moles of H2O (or other stuff) there is 9.5 moles of HCl? Does it mean that for every 90.5 g of H2O there are 9.5 g of ...
5
votes
2answers
3k views

Any side effects to using calcium chloride as a desiccant?

Based on cost, availability, and moisture absorption capacity, calcium chloride seems to be too good to be true. Are there any side effects to using calcium chloride as a desiccant? I'm interested in ...
5
votes
1answer
778 views

Chemistry of toilet bowl mineral stains on porcelain

I live in Massachusetts, my house has 3 bathrooms and I live alone. If I don't scrub my toilet bowls once a week they build up brownish-yellow mineral stains. These seem independent of whether I've ...
1
vote
1answer
995 views

Why dont we use potassium hypochlorite for bleach

I have been reading wikipedia and according to the article on potassium hypochlorite it can be used as a disinfectant. But it is not listed anywhere in the bleach article. I know we typically use ...
4
votes
0answers
49 views

Why does the CO2 gas quantity in Sodastream cartridges differ in different nations? [closed]

Just was looking at the $\ce{CO2}$ cartridge for the Sodastream soda / seltzer maker I was planning on buying and this bit of info caught my eye: Any idea why they may want to pack $\pu{25 g}$ less $\...
2
votes
1answer
511 views

Home test for magnesium carbonate

People that do rock climbing and weightlifting usually use magnesium carbonate on their hands to decrease slippery hands. I would like to know how can someone that buys MgCO3 can really be sure it's ...
-1
votes
1answer
57 views

Chemical reaction to produce 5 liter of gas [closed]

I'm looking for a chemical reaction in order produce about 5 liter of harmless gas. The goal is to start with something that takes as little volume as possible to start with, and reacts to fill up a ...
5
votes
2answers
11k views

Is dissolving salt a chemical reaction or a physical change?

Physical changes are limited to changes that result in a difference in display without changing the composition. (source) e.g. melting water or dissolving sugar in water Chemical reactions are ...
4
votes
2answers
696 views

Melting ice with salt - how does it start?

I know that salt reduces the melting point of ice. I can see how a little bit of salty water can melt ice to water which can dissolve even more salt. But how does it even start? There is ice, which is ...
3
votes
1answer
9k 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 ...
2
votes
1answer
85 views

Marker dissipates on White board paint [duplicate]

What causes white board markers to dissipate when writing on dry erase painted surfaces. It almost immediately start to pull together and seems as if it disappears