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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.

9
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1answer
216 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
votes
1answer
92 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
38 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
votes
3answers
117 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
241 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
1k 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 ...
1
vote
2answers
451 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
487 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
74 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
81 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
85 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
vote
0answers
62 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
48 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
107 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
1k 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
vote
0answers
44 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
vote
0answers
85 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
2k 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
24 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
125 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
641 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
57 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
140 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
vote
0answers
31 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
318 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
2k 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
685 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
1k 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
70 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
77 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 ...
4
votes
2answers
2k 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
426 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 ...
2
votes
1answer
656 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
43 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
360 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
43 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
7k 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
583 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 ...
2
votes
1answer
6k 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
53 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
4
votes
0answers
1k views

Storing alcohol in a thermos bottle

My thermos bottle's instructions say: Füllen Sie keine kohlensäurehaltigen Flüssigkeiten oder Trockeneis in das Produkt. Füllen Sie keine alkoholischen oder öligen Flüssigkeiten in das Produkt. ...
9
votes
1answer
2k views

The coldest (the most endothermic) reaction [closed]

What chemicals can you mix that causes the coldest (the most endothermic) reaction on a $\pu{kJ /kg}$ basis?
2
votes
1answer
240 views

Rust removal ended with black oxide on the metal?

I have tried to remove common red iron rust from a small piece of metal that looks like steel. I submerged it into hot water with a bit of citric acid, and let it sit overnight. In the morning I ...
0
votes
0answers
243 views

Do mixtures have a boiling point?

Let's assume a mixture which can be heated without decomposing. This site explains that while pure substances have a sharply defined melting point and boiling point, mixtures tend to have a melting ...
1
vote
0answers
92 views

Why is paper sometimes yellow?

Where I'm from, most paper you find/get at stores has this yellowish tinge. Why is it yellow and not white? In my chemistry book it's mentioned that paper manufacturers "refine" paper from wood pulp, ...
3
votes
0answers
65 views

Why do certain mixtures foam and others don't? How to predict if a mixture will yield a foam?

I recently acquainted myself with the skill of whipping a mixture of sugar, fresh brewed/ hydrated instant coffee into a pale, fluffy, stiff and stable foam. This, as some might know, is known as Café ...
9
votes
1answer
201 views

Why does hot oil fry things, but hot water does not?

When a slice of potato is dropped into hot oil, it gets fried but the same in hot water, gets ‘cooked’. What is it about oil that gives the slice of potato the crispy feature while water only makes it ...
3
votes
0answers
43 views

Continuous series of inorganic hydrates (from mono- to deca-)

I'm doing some research for university and it has to do with crystals. I'm currently experimenting with $\ce{CuSO4 * 5 H2O}$. I know we refer to the formula as copper sulfate pentahydrate. And also, I'...
5
votes
1answer
90 views

How much yeast is necessary to produce the same amount of carbon dioxide that I exhale?

I think I might have bed bugs. I read that bed bugs are attracted to $\ce{CO2}$ and heat, I also know that yeast produces $\ce{CO2}$ as a waste product. Knowing that, I did some research and found ...