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.

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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 ...
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0answers
38 views

You are given 45.0 mL of a 2.018 M solution of NaCl [on hold]

You are given 45.0 mL of a 2.018 M solution of NaCl. If all of the water is allowed to evaporate, then the mass of the NaCl left in the container is _________ g.
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0answers
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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 ...
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3answers
29 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 ...
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0answers
29 views

How many moles of oxygen requires to burn 2.40 moles of ethane [closed]

I cannot answer this question so please help me na please
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1answer
44 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
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1answer
32 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 ...
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1answer
22 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 ...
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1answer
217 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 $\ce{ZnS}$) ?
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0answers
34 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 & ...
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1answer
48 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 ...
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0answers
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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 $\mathrm{Eff} \le\left(1-r^{1-\gamma}\right)$ ...
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0answers
46 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 ...
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0answers
32 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? ...
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1answer
47 views

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

Is there a reason for all the bottles being 70% ethanol, or is it convention.
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0answers
19 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 ...
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2answers
62 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 ...
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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?
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1answer
39 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?
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2answers
788 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?
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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): One thing I notice is that there is a distinct smell that comes ...
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1answer
40 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 ...
15
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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
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1answer
35 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
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1answer
33 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 ...
2
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1answer
60 views

what is the formula of bleaching powder?

What is the structure and preparation for bleaching powder? Why there is a controversy in the formula of bleaching powder? I have encountered many forms of the formula of bleaching powder, like ...
9
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1answer
425 views

Cold-sensitive magic pen

Yesterday, I bought some "magic" rollerball pens (those with water-based ink), available in red, blue and black. They look and write like a normal pen, but have an eraser at the upper end, just like ...
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1answer
120 views

Can molten sugar also rotate polarized light as sugar water does?

It is well know that the sugar water can rotate the plane of linearly polarized light, so light bends when travelling in sugar water. However, do the liquid state of sugar but not the sugar solution ...
11
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1answer
745 views

Why is gum so sticky and what chemicals make for easy removal of gum?

To give this question context, I work in a restaurant and sometimes I'm in charge of getting all of the gum off of the tables at work. Don't mind the work, but I'd be interested in hearing what makes ...
19
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1answer
3k views

Could milk rust a steel teaspoon?

Recently, while cleaning a neighbour's fridge (turned off for a few weeks), I came across a cup (closed with a lid). Inside the cup was, to my olfactory horror, congealed milk, with a steel (iron) ...
14
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1answer
367 views

What causes that foul taste with combination of toothpaste and orange juice?

Ugh, I drank orange juice too soon after brushing my teeth and my mouth feels awful! What causes that foul taste with this combination of toothpaste and orange juice? Is it a reaction between the oil ...
4
votes
1answer
57 views

Can I successfully use a humidifier to distribute caffeine to wake someone up without the usual morning drowsiness?

Would I have any success putting coffee in a humidifier? Or perhaps water mixed with caffeine powder? So I could wake up without a jolting alarm clock, feeling like I already had a cup of coffee? I ...
4
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0answers
47 views

Why ginger reacts with sparkling water?

I think that the ginger ale is born this way. Anyway, if you put the ginger in a glass and add sparkling water, small drops splash out of the glass, the water is fizzier, more effervescent. Why? ...
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1answer
136 views

Is there a way to dissolve glue?

Background: I have a journal from my childhood. I applied glue (uhu brand. this one) to the papers almost 10 years ago. Q: Is there a way to dissolve the glue and make the pages readable?
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1answer
348 views

Chemicals in Urinal Odor Eaters

What chemicals are used in so-called urinal "odor eaters"? Do they actually destroy odors, or do they just mask them? Also, are these chemicals subject to any environmental laws or regulations?
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3answers
1k views

Why is condensation in dyed beverages colorless?

Does food coloring somehow evaporate and turn into nothing? Or does the beverage itself being much more color intensive? I had a bottle of Gatorade, colored Lemon-Lime (and flavored as such). I ...
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1answer
39 views

Does acetone eat through Thermoplastic polyurethane and Polycarbonate

I used nail polish remover on an expensive phone case to remove sticker residue (and it worked, no longer sticky). I didn't know it didn't mix well with plastic materials. Did the acetone damage it?
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1answer
83 views

Boiling dish soap

Is it dangerous to boil dish soap (natural, ex: walgreens brand "ology") while also cooking other foods in the kitchen (ex.pasta)? I was trying to clean some pots and read online that a good way to ...
7
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2answers
2k views

Why do soft drinks fizz?

I know it has something to do with carbon dioxide, but what exactly happens and causes the characteristic sound we hear (especially after we shake the bottle)? How do we manage to dissolve a non-polar ...
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1answer
49 views

Cleaning silver - which method is better? [duplicate]

What is the advantage of this approach over polishing the silver with an abrasive? "Silver tarnish is an outer coating of silver sulfide, $\ce{Ag2S}$, formed when silver reacts with trace quantities ...
6
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2answers
180 views

Why there is no change in water level when salt is added?

Let us say we have one glass of water and after that when we add one or two spoon of salt then we notice that salt dissolves in it but when we measure the water level we found that there is no ...
2
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1answer
65 views

Quality of water for drinking purposes

As I’m reading about water cations and anions, I read that the benefits we gain from water are of course lots, but the most important of them is the neutralisation of acids ($\ce{H+}$) from the anions ...
2
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1answer
36 views

Isolating calcium acetate from water with electrolysis

That's a long page, so you can optionally jump to the "Thunderstorm it" part, but a bit of context is always neat :) Context Say I'm cooking an egg in vinegar. The egg shell is made of calcium ...
2
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1answer
27 views

Pb-based pigments and rhodizonate salts

In a previous question, I learned that we can detect lead with sodium / potassium rhodizonate, giving a nice purple color when reacting with pure (elemental?) lead. But in the paint, lead is ...
4
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0answers
48 views

How to dissolve a strong resin in difficult situation?

The resin is made up from two components: Component A: silicic acid, sodium salt (less than 10% sodium silicate) Component B: Diphenylmethane-4,4'-Diisocyanate, isomers and homologs ...
17
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1answer
150 views

How many times can we recycle one sheet of paper?

Its really interesting to see the process of recycling of paper (as shown in picture below) but at the same time I was thinking like for how many times can one sheet of paper can be recycled ?
7
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2answers
105 views

How to detect lead paint on a bicycle?

Recently I started renovating a bicycle. The frame has been painted probably over 30 years ago, and despite holding well, big patches of rust are showing. So it's time to give the bike a new paint ...
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1answer
2k views

Why super glue does not stick inside their own bottle?

We usually use super glue to stick any two objects but I was wondering like why don't they stick inside their own bottle ?
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1answer
1k views

Why is europium used in Euro bank notes?

Europium is apparently used as an anti-counterfeiting measure in Euro bank notes because of its fluorescence under UV light. Is there any reason why it is specifically $\ce{Eu}$ and not any of the ...
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1answer
62 views

Does the temperature of water affect its ability to extinguish fires?

Since water can be either hot or cold, does its temperature affect its ability to extinguish fires?