Applications of chemistry to reagents and reactions of everyday life. This tag should not be applied to questions which are just about simple chemistry but it is specific to questions about chemistry in an out-of-laboratory or commonplace context.

learn more… | top users | synonyms

5
votes
0answers
17 views

What causes the “white water” smell?

I can detect a distinct smell when I am near water going over a weir. I could tell that I was near "white water" if I was blindfold. Can anyone tell me what causes this odour?
0
votes
0answers
7 views

Charges on the electrodes in a Galvanic cell? [on hold]

As we know that Charge on the Anode is positive and cathode is negative. But in a Galvanic Cell These Charges are opposite As Galvanic cells Anode is Negative and Cathode is positive. Why is this so? ...
0
votes
0answers
18 views

Chemistry(redox reactions) [on hold]

How does the H2O2 form to H2O and O2, My problem is how the Oxygen gets positive and negative oxidation numbers? oxygen is a non metal. So how it gets negative oxidation number?
0
votes
0answers
23 views

Collective mass [on hold]

On a dry day, your body can accumulate static charge from walking across a carpet of from brushing your hair. If your body develops a charge of −15 µC (micro coulombs), how many excess electrons has ...
2
votes
1answer
34 views

Flavor components of high end vodka?

I always thought vodka was just alcohol and water, and that the ideal vodka was one lacking all flavor components characteristic of the grain or potato mash that it was distilled from. I once saw a ...
1
vote
0answers
27 views

How to test for heavy metal in water?

Is there a way to test if water has toxic heavy metals. Samples to both the water and people who drink it are available. Preferably, it should be done with at hold materials. I could also borrow ...
0
votes
0answers
13 views

What materials are used to thermally imprint graphics on cotton fabrics?

For example t-shirt shops transfer color masks onto the cotton fabric using a thermal press. What materials are those masks made of?
12
votes
1answer
2k views

Why water spills on our shirt change its colour?

While drinking water, some of it fell on my shirt and as usual, as has happened to many of us, the colour darkens? So why does this happen ? Is it due to some chemical effect or physical one ?
0
votes
2answers
48 views

How much does a light heat the air around it?

My dad told me to turn off the lights when I'm not using them because it will keep the house cooler. I don't think he is correct that a light can heat up the room. How much of a difference in the ...
0
votes
0answers
15 views

Stainless steel corrostion resistance to strongly basic solutions

Several online sources indicate that SAE 304 stainless steel is a "Good" but not "Excellent" material for containing strongly basic (e.g., 3.0 M $\ce{NaOH}$) aqueous solutions. They define "Good" as ...
1
vote
0answers
31 views

Frequency of Mpemba Effect

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
votes
0answers
20 views

Liquid nitrogen to cool liquid?

Is it possible and safe to use liquid nitrogen to quickly cool a 5 gallon tank of liquid from room teperature to say 34°f? Or is there another way that can produce really fast results?
5
votes
0answers
37 views

Iron chemistry: acetates for ebonizing wood

I have recently been “brewing” what is commonly called “iron acetate” for ebonizing wood, and I'd like to understand the chemistry of the iron/acetic acid reaction, which should be fairly simple, but ...
-2
votes
0answers
38 views

Chemistry investigatory project

Well I have to conduct this investigatory project for Chemistry. I had an idea to test all the soft drinks for presence of alcohol, phosphate, sucrose, etc. I know how to do qualitative analysis for ...
3
votes
1answer
46 views

How to control and vanish termiticide/pesticide fumes from room

I had some wood work done in my room and termiticide (UNIBAN-20 (Chlorpyriphos-20% EC) was used so that there is no termites attack in future. The stupid carpenter was using this product for the first ...
2
votes
1answer
46 views

Does a gold detector exist?

I see many sites that claim to sell working gold detectors but I am not convinced that they work. Also, does a metal detector detect gold?
3
votes
1answer
47 views

What typically happens to H2 molecules released into atmosphere (with no spark source)?

I'm wondering what happens when H2 leaks from say a transmission pipe in an unenclosed area. No immediate source of ignition, I know it rises more quickly than helium (x2 I believe) and dissipates in ...
7
votes
1answer
82 views

What is the difference between wet paint, dry paint, and in between those stages?

A day after painting a closet, I set a piece of wood on the wall of the closet that was painted a day ago as well. Within minutes, both of their layers of paint fused together (please correct me if ...
0
votes
0answers
98 views

Using helium to make home brewed beer

I want to brew beer using helium instead of $\ce{CO2}$. Most beers use about 2.5 grams of $\ce{CO2}$ per litre except stout like Guinness which uses nitrogen as it allows bubbles for much longer ...
1
vote
1answer
32 views

Cleaning stains with hydrogen peroxide and bleach

A while back, I discovered that if you have a stain on a white shirt, you can remove it by putting hydrogen peroxide on the stain, then adding some bleach to it. I have used this for getting out ...
1
vote
0answers
28 views

What reaction occurs when soaking a piece of meat in apple cider vinegar?

I would like to know what reaction occurs when soaking a piece of meat in apple cider vinegar. Additionally, how does it happen? I read a topic which was about the bad reputation of apple cider ...
5
votes
1answer
315 views

Why does lactose-free milk last so much longer than regular milk?

I buy lactose-free milk. The sell-by date is usually as much as eight weeks from the date of purchase, which is in the neighborhood of twice that of regular milk. This seems puzzling; lactose-free ...
2
votes
0answers
28 views

What alcohol concentration makes bathroom cleaner “disinfecting”?

There are many do-it-yourself cleaner solutions out there, using a combination of vinegar, alcohol (in a "cheap vodka" concentration), dish soap, baking soda and essential oils. I like these recipes ...
5
votes
1answer
42 views

Is the density of the solution significantly different from the density of the solvent?

I am working on a mathematical model for the dissolution of coffee in water. I need to know some precise details about the effects of dissolution on the density of the mixture of the substances (that ...
4
votes
0answers
36 views

Preservation and bleaching of sliced mushrooms with hydrogen peroxide

According to the article Extending the Shelf Life of Fresh Sliced Mushrooms, it states that 5% (v/v) hydrogen peroxide is an effective means for the preservation of sliced mushrooms. In regards to ...
0
votes
1answer
19 views

Does relative amount of lithium and cobalt oxide change in recharged battery?

There is a question on my assignment about stoichiometry. I spent 2 whole days searching and review this topic but still clueless. Reaction in lithium ion battery $$ \ce{Li(s) + CoO2(s) → LiCoO2(s)} ...
2
votes
0answers
30 views

Do any substances work like consumers of hair moisturizer believe it to work?

Yesterday, my girlfriend remarked on how pleased she was with the effects of the hair moisturizer she has been using: "I started using it just a month ago, and look, it's healed all the damage." I ...
6
votes
2answers
77 views

Why does concentrated HCl fume?

It is a common observation that a concentrated solution of hydrochloric acid kept in the lab fumes. What is the chemistry behind this phenomenon? Does $\ce{HCl}$ somehow react with the moisture in the ...
1
vote
0answers
31 views

What is the transparent film that covers water-soluble dishwasher tablets?

These dishwasher tablets (Finish Powerball Shine) seem to be covered in plastic! But that can't possibly be true since there's no unwrapping, and they're completely soluble in water. What is the ...
2
votes
3answers
31 views

protecting contact between aluminium and copper wires

The quarters in which I live has both aluminum and copper household wiring. This results in corrosion of the contacts and can lead to sparking, overheating, and even fire. Is there any way to ...
0
votes
1answer
50 views

Why do toothbrushes have to be dried? [closed]

I carry around a toiletries bag. I put my toothbrush there right after brushing in a restaurant or some public area. These strangely similar articles(1, 2) suggest toothbrushes have to be aired. Why ...
4
votes
1answer
35 views

Why is glycol used as an antifreeze?

Lowering of the freezing point on adding a solute is a colligative property of solutions, it doesn't matter what the nature of the solute is (of course we have to assume ideal solutions). So when it ...
0
votes
1answer
24 views

Reduced-pressure (vacuum) evaporation/drying of 15 liters of aqueous solution

I have 15 liters of aqueous solution inside an aluminum stock pot which rests upon a hot plate. I want to reduce the boiling point from 150°C to 100°C using reduced pressure. What is the most ...
3
votes
1answer
247 views

Why does Zinc sulphide glow?

Zinc sulphide is used in road signs because when light from cars hit the road signs, it glows. What actually is the reason for the glowing of road signs (actually glowing of $\ce{ZnS}$) ?
1
vote
0answers
36 views

Bubbles appeared on rubber gloves

I have a pair of natural rubber dishwashing gloves. These particular gloves were brand new but sitting loose out of the package on top of the supplies under the sink. I pulled them out today & ...
2
votes
1answer
55 views

Why dishwashers are corrosive to aluminum?

When I put aluminium parts into my dishwasher, they get tainted and they are sometime covered with white dots similar to salt. I don't think it is aluminium oxide. What are the chemical reactions ...
1
vote
0answers
21 views

Thermodynamic-Fuel and efficiency

Why is the maximum theoretical efficiency of Ar engine higher than that of Nitrogen engine? On a molecular level. For an Otto Cycle $\mathrm{Eff} \le\left(1-r^{1-\gamma}\right)$ ...
2
votes
0answers
53 views

Coffee and orange juice concentrations with a twist

This question dates back to a time where I used to watch something called The Curiosity Show... Kinda like Bill Nye the Science Guy's show. I just can't recall the answer to this so I'm hoping that ...
0
votes
0answers
36 views

Are concentrated salt solutions stable over time?

I have to use dilute salt solutions incredibly frequently, and it takes valuable time to make them from pure reagents every time I need them. Are concentrated salt solutions fairly stable over time? ...
1
vote
1answer
49 views

What's with the 70% ethanol? [closed]

Is there a reason for all the bottles being 70% ethanol, or is it convention.
2
votes
0answers
23 views

What chemicals could be used to repair rubber tires?

I have a beaten old R/C car that I am restoring for my son. It has some nice rubber tires on it, but they are kind of old and worn. The rubber itself is almost moldy and looks matte. I could just ...
0
votes
2answers
75 views

How can I convert the number of particles per liter to gram per liter

How can I convert the number of particles per liter to gram per liter? I know the size of these particle and so, I calculated the volume and then by the density I calculate the mass. After that I ...
12
votes
2answers
1k views

Can I make my own graphene at home in my kitchen?

Graphene is cool. Can I make some? What do I need? Is it at all feasible to make it in quantity?
-3
votes
1answer
48 views

What is the chemistry behind smell of human perspiration(sweat)?

What is the chemistry behind the bad smell of human perspiration? also what is its composition?
6
votes
2answers
800 views

Is turning graphite carbon into diamond industrially doable?

I've read somewhere on the Internet that heating graphite at 4200°K at a sufficiently high pressure would turn it into diamond. This chart seems to support this idea: Is that doable industrially?
24
votes
1answer
1k views

What causes the old book smell?

I have a collection of old books (all 80+ years old), recently, I received a British Chemistry text from 1903 (intro page below) - this being the oldest book of my collection (112 years old at the ...
1
vote
1answer
41 views

Is ingesting water during swimming harmful?

Sometimes I feel the water in the pool is heavily chlorinated. However it is impossible for me to swim without ingesting some water. I am only a learner but even advanced swimmers do concede that they ...
16
votes
2answers
1k views

Why do socks stink?

What chemicals are responsible for the stench emanating from socks? If it's just sweat, why don't underwear or vests stink as much? Which gas am I inhaling when smelling socks to decide whether they ...
1
vote
1answer
39 views

What makes cola efficient as a rust remover?

I actually tested submerging a bunch of old rusty knives blades in a cup of plain cola for a few days not expecting much. To my amazement the myth held true, coke is a really good rust remover. So ...
2
votes
1answer
39 views

What are the active ingredients of shampoo, and how do they work?

After seeing one too many TV commercial about the fantastical properties of different high-profile shampoo products all "with documented effect" it suddenly struck me that I never actually researched ...