Stack Exchange Network

Stack Exchange network consists of 174 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

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.

1
vote
1answer
58 views

Applications of magnesium sulfate monohydrate MgSO4 · H2O

How is magnesium sulfate monohydrate $\ce{MgSO4 * H2O}$ used for in chemistry and how does it work as a valuable laboratory drying agent? I could not find too much information in my book or the ...
0
votes
0answers
24 views

I'd like to ask, how to make permanent ink, that will be invisible when used, but after like 1hr - 3days it will appear (preferably dark color)? [closed]

URGENT.Can someone help me on how to make permanent ink, that will be invisible when used, but after like 2 or 3 days, it will appear (preferably dark colors)? Thank you.
1
vote
0answers
18 views

Why does coconut oil spoil much faster than groundnut oil?

I have observed that various foods cooked using coconut oil spoil much faster than foods cooked using groundnut oil. One good example is Asian coconut milk curry. Even with proper refrigeration, this ...
-1
votes
0answers
18 views

How many Oxygen atoms are present in 1.0 x 10^9molecules of Aspartame, C14H18N2O5? [closed]

How many Oxygen atoms are present in 1.0 x 10^9molecules of Aspartame, C14H18N2O5?
-3
votes
0answers
24 views

Hot Water Tanks [closed]

I have a room $\pu{810m3}$ and I add a 20,000 litre insulated hot water tank ($\pu{3.7m}$ diameter x $\pu{2.8m}$ high) containing water at $\pu{65 ^\circ C}$. How much will the temperature and ...
-1
votes
0answers
29 views

What is the formula for an element under normal conditions? [closed]

Selenium, oxygen, bromine and vanadium, I tried entering what I though was the diatomic number for these, like $\ce{O2}$, $\ce{V2}$, $\ce{Br2}$, $\ce{Se2}$, but it doesn't work. Any feedback on this?
12
votes
2answers
4k views

Why does ice crack when a drink is poured on it?

I think most people have experienced this, but while pouring a beverage over ice I noticed the ice cracked. Before After My initial thought was that because the beverage has an antifreeze property ...
1
vote
0answers
24 views

What neutralizes the active ingredients (napthalene and/or paradichlorobenzene) in moth balls? [closed]

Question: What is effective in removing residual moth ball smell from inside a car? Issue: We used moth balls in our car to rid it of mice. (Never do this; it does not work.) We removed the moth ...
-1
votes
0answers
28 views

In which rotten food can I find carbon monoxide and methane? [closed]

I want to detect the odor that comes out when food rots. According to me when bacteria acts on the following components the following gases are produced: 1. protein: ammonia 2. starch and fat: Carbon ...
0
votes
0answers
22 views

Why cant nail polish be used as an acid mask for making a PCB?

In the question: PCB etching with sodium persulfate, permanent markers seem the most used and experimented with. The thickness of nail polish would give more solid planes and traces. Might nail ...
1
vote
0answers
38 views

What really happens when wax 'dries out'? [closed]

I know that there's a lot of different types of things that fall under the 'wax' umbrella, but they all seem, eventually, to various degrees, to 'dry out'. For example, this other SE question (and ...
-1
votes
2answers
45 views

Why does MgCl2 become Mg^2+ and Cl^-? [closed]

I'm taking a biology class, and it's one-chapter intro to chemistry chapter had been driving my study group nuts. On a recent quiz, it asked the question: In water, $\ce{MgCl2}$ dissociates into $\...
-2
votes
0answers
20 views

Should I blend at high or low speeds to minimize oxidation of fruits and veggies in juice? [duplicate]

How are antioxidants in fruit and vegetable juice preserved by blending at high speeds for shorts periods of time, or blending at lower speeds for longer periods of time?
0
votes
0answers
24 views

Is borax redundant to trisodium phosphate as a cleaner?

I know that trisodium phosphate (TSP) is used as a rinse aid in cleaning solutions, but I have also seen borax as an (alternative?) ingredient as well. Is borax redundant to TSP, in other words, is ...
0
votes
1answer
21 views

Transferring suspended substance from isopropyl alcohol to water?

I have this UV-reactive invisible ink (a clear liquid.) According to the data sheet, it is suspended in an isopropyl alcohol base. Unfortunately, this is terrible for my particular application for two ...
-2
votes
1answer
31 views

Will fruits and vegetables be more oxidized if blended at high speed for a long time or at less rpm for a short period of time? [closed]

Will fruits and vegetables be less oxidized if blended at higher speeds for shorter periods of time, or at lower speeds for longer periods of time? Do the oxidized molecules in vegetable juice ...
0
votes
0answers
30 views

Can a substance be extracted from solution by adding another substance with a higher solubility?

Suppose that I have a substance X dissolved in water. I then add a substance Y to the solution. Substance Y has a higher solubility in water than substance X, and more than enough of substance Y is ...
0
votes
2answers
35 views

what is the exact meaning of oxidation state? [duplicate]

can you mention the concept of oxidation state without its simple definition i-e it is the apparent charge +ve or -ve.....😪 I found these in wikipedia but didn't understand."Conceptually, the ...
2
votes
0answers
58 views

Detecting alkaloids - Dragendorff's reagent

I am writing a book and as part of the plot one of the characters has a plant that contains alkaloids in tincture form. They want to do a test to detect for the alkaloids so they use the Dragendorff's ...
1
vote
1answer
33 views

Is the flint used in disposable lighters toxic?

Especially the sparks that result when using them. I heard this from a friend and can't seem to find an answer on Google.
1
vote
0answers
25 views

How to make rheoscopic fluid using glycol stearate flakes

Rheoscopic fluid can be made by adding mica powder to water. I read that mica powder can settle and condense after sitting around for a long time. So I want to use glycol stearate flakes instead. ...
3
votes
3answers
5k views

Sugar solutions have a neutral pH in themselves, but it makes your body acidic. Why? [closed]

I'm not an expert, but as far as I understood a sugar solution is completely neutral since sugar can't take hydrogen ions out of the water or donate them in. Sugar is a non ionic compound, so it does ...
2
votes
0answers
28 views

Is there a non toxic moisture indicator that can be applied on a wall?

I am looking for a substance that could serve as an indicator for a risk of mold growth, e.g. by a change of its hue. Cobalt chloride is both irritant and carcinogenic so is not an option. I've found ...
1
vote
0answers
11 views

Another salt-dough question

In January 2017, someone asked how salt dough worked. How does salt dough work?. In the answer it was said that the salt gives toughness. My question is would the size of the salt crystals matter. ...
-1
votes
1answer
31 views

What is PPM in terms of air concentration?

When they say the $\ce{CO2}$ concentration is $\pu{350 ppm}$ what does this actually mean? Does this mean that if we took a sample of air say $\pu{1 m3}$ then $\pu{350 mg}$ of that cubic meter would ...
-1
votes
1answer
40 views

Test for the dissolved iron [closed]

Ok there’s this question on my chemistry review that I can’t figure out. It states: A sample of well water is known to contain a high concentration of iron. what solution could you use to test the ...
13
votes
3answers
4k views

Does a smell imply particles or chemicals in the air? [duplicate]

(I know little science so please help me if I'm in the wrong place or if my question needs editing. I could use help with tagging, for example.) If I can smell something then does that mean there are ...
0
votes
0answers
13 views

Chemical interactions occuring when a ball smashes into a wall

I was just wondering. When a hard metal ball smashes into a concrete wall, such as during the tearing down of a building, what are the chemical interactions, in terms of electrostatics, that take ...
-1
votes
1answer
26 views

Quantity of base needed to neutralise litre of 36% HCl?

Sorry for asking a basic chemistry question. I last did this kind of chemistry at school about 30 years ago and I don't have confidence that I'd get it right from first principles :) Short version: ...
0
votes
1answer
18 views

Apple Cider vs. Cleaning Vinegar

My grandparents stumbled on some cheap Heinz Apple Cider Vinegar while cleaning their house. Ingredients: Made from the juice of apples diluted with water to a uniform pickling and table strength ...
-1
votes
1answer
23 views

Do harsh soaps clean clothing more powerfully? [closed]

My grandparents chanced on some cheap soap in their house while cleaning. They obviously won't use it to shower, but does the abrasiveness mean that they're more potent? To wit, what exactly do the ...
-3
votes
1answer
38 views

I need some help on this Chemistry question can any one help please!! I need to find the cost of a single atom of aluminum [closed]

A 75 ft2 roll of aluminum foil costs $3.79. A 12"x12" pieces has a mass of 1.0 g. How much does a single atom of aluminum cost, in dollars? i need to show all my work i am so lost.
2
votes
3answers
82 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. ...
1
vote
0answers
55 views

What governs the amount of smoke produced by an extinguished match?

First Chemistry question, so apologies if this isn't quite in the spirit of this SE. I have noticed that when extinguishing a lit match by blowing it out, the amount of smoke produced can vary widely....
-1
votes
2answers
49 views

Every liquid is water [closed]

Is it that every liquid we see is water, with more or less of x substance? Example: urine is water with salt and minerals
4
votes
1answer
79 views

What component(s) of instant coffee make it deliquescent?

If I put small, separate piles of instant black coffee powder, sugar, powdered creamer, and even something very ionic like table salt out in humid air and come back in a few days, only the instant ...
15
votes
3answers
3k views

Is there such a thing as a “minimal soap” molecule?

Wikipedia's Soap gives sodium stearate as an example of soap, and apparently I've been eating it: Sodium stearate is the sodium salt of stearic acid. This white solid is the most common soap. It is ...
2
votes
2answers
66 views

nickel-copper fabric: shielding viability after being subjected to weathering

I know the solution can be as simple as a well-sealed garbage can, but I am contemplating making a more malleable fabric based faraday-cage-esque contraption. The plan is to use nickle-copper fabric ...
3
votes
0answers
22 views

How to align povidone-iodine molecules in order to look for optical polarization?

In this answer I mention how early polarizing filters (e.g. sunglasses) were made by doping a polymer with iodine atoms and then stretching the film to orient the polymer molecules. Electrons donated ...
-2
votes
1answer
46 views

Celsius to Kelvin [closed]

A temperature conversion question asks the following: "The temperature of a sample of a substance changes from 10°C to 20°C. How many Kelvin degrees does the temperature change?" The correct answer ...
-2
votes
2answers
63 views

Why does a balloon filled with helium float if there is so much more air on top of it than below it? [closed]

Also what about Newton's third law? Wouldn't buoyancy be flawed because a balloon also displaces the air that is on top of it thus a downward force?
1
vote
1answer
42 views

Diluting topical cream (10%)

I need to dilute a face cream with 10 % active ingredient to 2.5 % and 5 % but I am confused as to how. I looked into the $$c_1V_1=c_2V_2$$ and $$\text{concentration of a solution}=(\text{amount of ...
3
votes
1answer
56 views

Why was lime used by the Nazi's?

I am reading a book (Into That Darkness) about the Nazis, where there is the following passage: causing unimaginable suffering to the deportees who were either left waiting, naked and without food ...
0
votes
1answer
54 views

Aluminum and aluminum oxide

I have a new grain mill that I am hesitant to use because the rollers are anodized aluminum. As I understand it the anodized aluminum is actually aluminum oxide and supposedly non-toxic. I realize ...
1
vote
1answer
35 views

Function of 'organic' vs regular pipe cleaner

Recently, I needed to buy some pipe cleaner, as sometimes even with care hair and other detritus gets lodged so deep down the shower drain that it is not possible to get it out. I always try to avoid/...
1
vote
0answers
35 views

Mixing dilute hydrochloric acid and battery acid

I was doing an experiment on gold recovery. When I added some gold platted pins to battery acid nothing seemed to happen.I impatiently added some duluted hydrochloric acid labeled 20%, immediately ...
1
vote
2answers
38 views

Materials used in cooktop heating element, and reason for black appearance

I have been interested in the structure of heating elements/coils used in cooktops. I am referring to something such as in the following picture: I have a cooktop at home with such elements, and at ...
4
votes
1answer
154 views

Is flour or baking soda really suitable for extinguishing grease fires?

I think most have heard the advise that you should put flour (or baking soda) on a grease fire to absorb the oil before. While this is certainly better than using water, I'm skeptical. For starters ...
0
votes
1answer
71 views

What is a “tri-salt polymer” as described by this product that eliminates and prevents mold?

This answer mentions an anti-mold product called Concrobium Mold Control. The FAQ linked on their website says: Q: I see Sodium Carbonate listed on the label. Is Concrobium Mold Control just Sodium ...
2
votes
1answer
266 views

Can superglue (cyanoacrylite) be thinned with acetone and still harden?

I'm looking for something with an extremely low viscosity to use as a binder for cold casting iron oxide with very fine detail (it's to make a slotted winding core for an electric motor with $\pu{1mm}$...