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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1answer
21 views

How does common salt speed up the setting of the plaster of Paris?

We use plaster of Paris (POP) to cast and lift foot prints/tyre prints from the crime scene for evidence purpose. While preparing cast, we follow standardized protocol and add a pinch of common salt ...
-3
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0answers
28 views

found a recipe for something but forget what! [on hold]

what does it make when you mix 1/2 cup each of finely ground Borax, No Salt, Epsom salt, and alum in a copper cup with a magnesium cylinder inside that you put the powder around and melt the powder to ...
-5
votes
1answer
39 views

How does an air conditioner produce liquid [closed]

I always notice that when an air condition is working and cooling the room it, is heating outside the room and a Liquid is dropping from the other side of the air conditioner. how does this happen and ...
0
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0answers
22 views

How to remove salt from powdered soup mix?

Sometimes I carry powdered soup mix (Knorr/Maggi) when I travel but they are way too salty. Is there an efficient and simple chemical process to lower the salt content? I know sodium is super soluble ...
0
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0answers
14 views

The curious breakdown of calcium carbonate

Here's the reaction: H2SO4(aq) + CaCO3(s) ===> CaSO4(s) + H2O(L) + CO2(g) I don't understand why calcium carbonate breaks down. It's not soluable in water. I could understand the hydrogen ...
1
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0answers
18 views

hydrogen peroxide formation from a superoxide: confusion about oxidation numbers

Here's the reaction: $\ce{2O2^{-}(aq) + 2H+(aq) <=> H2O2(aq) + O2(g)}$ I see where some oxygen atoms have lost electrons, but I dont see what has gained ...
0
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0answers
13 views

Mixed to chemicals with corresponding percentage resulting to a PPM, how does each element contribute to the total PPM? thanks! [closed]

For example: 6 grams of CaNo3; Calcium 60% & Nitrogen 40% 8 grams of Kno3; Potassium 70% & nitrogen 30% BOth mixed together in a distilled water resulting to 1000 PPM. HOw much did the 3 ...
0
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0answers
14 views

I need help Calculating the added amount of NaOH at each step and plot the titration curve? [closed]

if you can show me an example that would be greatly appreciated with the calculations. Thank you Burette Reading --- VolumeOf NaOH ------ pH 27.41------ ---------0.00------ -------3.39 ...
0
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0answers
13 views

Calculate the added amount of NaOH at each step and plot the titration curve? [closed]

if you can show me an example that would be greatly appreciated with the calculations. Thank you Burrete Volume pH reading Of NaOH (ml) added (ml) 27.41 0.00 ...
0
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0answers
19 views

What chemical will cool water, but give way to warmth every few minutes or so, almost like a chemical strobe light of warmth and cold?

Is there a chemical that will cool a pool, yet gives way to warmth every few minutes or so? Kind've like a chemical strobe light.
34
votes
1answer
5k views

Why does shaking a match put the fire out?

Move a match slowly and nothing happens but if you shake it violently the fire will extinguish. Oxygen makes fire grow so why does waving a flame through the oxygen rich air put the fire out? Does ...
1
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0answers
39 views

What are applications of the reaction between oxalic acid and potassium permanganate?

I did the following experiment in my science class and for our write up we have to apply the reaction of oxalic acid and potassium permanganate to real life situations. We chopped up carrot and ...
1
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0answers
28 views

Predict Ion Attraction in an Aqueous Solution

An aqueous solution containing $\ce{Ca^2+}$, $\ce{Cl^-}$, $\ce{CO3^2-}$, and $\ce{NO3^-}$ is allowed to evaporate. Which compound will precipitate first? The correct answer is $\ce{CaCO3}$. I had ...
1
vote
0answers
32 views

Why do Pop Rocks fizz longer in milk than in Sprite?

After doing an experiment with Pop rocks in various liquids, it was noted that they fizzed the longest in milk. My daughter compared Sprite, apple juice, water and milk, and milk fizzed the longest. ...
0
votes
0answers
12 views

Hair Gel Derivative

I need a water-soluble, extremely fast drying adhesive gel. My first thought is hair gel. pros: Water Soluble (easily removed)*** most important High viscosity in liquid form ~60 cps Easily ...
1
vote
1answer
29 views

Baking Powder instead of soda error

Bit of a random one but I had an oven fire yesterday due to grease. I decided to clean my over as a result but stupidly used baking POWDER rather than soda and wiped it off with vinegar. Now I am ...
1
vote
2answers
156 views

Sensitive test for lead in water?

Some of my friends are in Flint and I'm horrified by their situation. I would like to learn how to test for lead independently. After all if you can't trust the state sending them water to test is ...
0
votes
1answer
48 views

Composition and pH of water produced by air conditioners

I would like to know if there are specific studies or research regarding the condensed water that is generated by air conditioners. Many people feel that this water is acid and corrosive but could ...
6
votes
1answer
59 views

Smoke cobweb formations?

One day, my mom decides to light the house on fire, and after we put the fire out, all of the cobwebs in the house are black. Obviously, this is because of the smoke. Later, some renovations guy tells ...
4
votes
3answers
56 views

Controled burn colored fire and safety

I am a martial artist who uses fire weapons in my shows. I am wondering how I can get the flames to be different colors. I've done some research about it, and have found that the salts of some ...
3
votes
0answers
47 views

Will washing child seat belt straps with baking soda and hydrogen peroxide make them unsafe to use?

My friend is afraid to use the child seat for her next child. She was told washing them with the solution weakened the fabric, The straps weren't submerged, but they did get throughly wet.
3
votes
1answer
82 views

Diesel additive spill. Odor elimination

I am not chemist, however I am interested in science and know some basics. So I have real life problem to solve and I hope there will be some people interested to help me or at least understand more ...
1
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0answers
41 views

Sugar cube is filled with liquid (coffee), only if corner is sinked for few millimeters

Sorry for quite stupid question, but I could not find answer for it (perhaps my question is wrong). I noticed one thing about sugar cubes. When I sink one corner of cube in coffee, just for few ...
1
vote
1answer
22 views

How to dissolve the build-up from a paraffin based oil?

I have a CNC lathes that use "oil" for cutting fluid during the machining of mostly metal materials. Typically a heavy paraffinic based cutting oil (petroleum distillate) is used during machining. ...
-2
votes
1answer
53 views

Calcium hydroxide and why there are parenthesis

Basics but in calcium hydroxide Ca(OH)2 , *Where the 2 is a subscript what do the parenthesis symbolize? Why isnt it just CaOH2?? Thank You.
3
votes
1answer
39 views

Corrosive/ Acid cabinet gets wet from time to time

I have a metallic acid cabinet in a chemistry-based lab which I use store hydrochloric acid, sulfuric acid and ammonia. I also store nitric acid together inside but they are physically separated from ...
0
votes
1answer
66 views

Why it is hard to rinse off soap from your body using rain water

I have experienced this when every time I take a bath using rain water, I just can't stop wondering why is it really hard to rinse off soap from your body?
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0answers
32 views

Iodine medical products

After an injury or getting a scare it is typical to use medical products containing iodine. They typically leave a huge red spot on the skin. Why are creams and solutions containing iodine used in ...
2
votes
0answers
22 views

What chemical measurements are related to the degree of flavor extracted by alcohol?

A recent project of mine includes making infusions of various ingredients to make liqueurs and bitters. Infusions, I've learned, vary widely in the amount of flavor extracted from an ingredient. ...
6
votes
1answer
100 views

Can the green spots in these coins be copper chloride?

My father collects coins as a hobby and lately has observed some green spots in some of his coins so he told me to ask here to see if anyone knows what it is. The coins are made of silver (999 ...
0
votes
0answers
37 views

How to de-lump road salt?

I have a huge bag of salt for my driveway that was left in a plastic container over the summer. It's now as hard as a rock. How can I make it granular again (other than a drill)? Would a bag of ...
5
votes
2answers
140 views

What happens to the bleach after mopping?

At home, I clean the tiled floors by mopping with highly diluted bleach. After mopping, I let the floor dry. What happens to the acid in the bleach? Will it crystallize on the floor, stay there ...
4
votes
0answers
36 views

Cat litter crystals causing toxic smell upon rubbing and pouring out of the package, safe?

I am under-educated in terms of chemistry hence the question and assumptions. Basically, for our cats, we are using what seems to be the latest scientific achievement in litter sand - the litter ...
0
votes
1answer
29 views

Need to chemically heat water

I have a holding tank on rv , non potable water that I need to heat up to drain . Live in northern alberta , temps are -20 . Don't want to wreck anything or gas myself out . Looking for over the ...
2
votes
1answer
40 views

About how much carbon monoxide is produced in these two different reations?

The U.S. Department of Agriculture produces a gas cartridge to poison subterranean rodents. The product is provided as a cardboard tube sealed at one end and then loaded with a mixture of 144.6 grams ...
4
votes
2answers
53 views

Does adding ice to sparkling mineral water extend the 'fizziness' of the solution before the drink goes flat?

To my understanding the carbonated beverage loses its $\ce{CO2}$ content as gas bubbles which gives the drink its 'fizziness'. The loss of $\ce{CO2}$ occurs due to the low solubility of carbonic acid ...
3
votes
1answer
121 views

Green kerosene in copper container goes colorless

I recently got hold of an old blowlamp that had not been touched for more than 30 years. The fuel tank of the blowlamp is made of brass. I poured the old kerosene from the blowlamp into a clean ...
0
votes
1answer
33 views

Alcohol Evaporation

If I were to leave an alcoholic spirit out to evaporate naturally (e.g. Campari) until it was just a powder, would that powder be non-alcoholic when rehydrated? In other words would 100% of the ...
-2
votes
1answer
34 views

VT graph thermodynamics

If we have one mole monoatomic ideal gas was taken through process AB as shown in the figure then ∆ S is positive and work is also positive but how can we find the value of work and heat absorbed as ...
0
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0answers
18 views

Can you write (with and ink pen) on hydrophobic paper?

Would the ink be repelled from the paper or prone to smearing?
0
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0answers
39 views

Is mixing ammonia and bleach spray in the same parcel of air considerably dangerous to health?

I've read a few articles advising not to mix bleach and ammonia in the same room because it makes chloramine gas. But my boyfriend and I are having an argument - he thinks that since those articles ...
0
votes
1answer
30 views

Does ethylene glycol sink in water?

I’m a little concerned that there is a far stronger mix of antifreeze in my car's coolant system than I am aware. I check the antifreeze level in my car (using a refractometer) when the engine is cold ...
2
votes
2answers
65 views

What made my solution cloudy?

I may know, but I would like an expert opinion and a possible solution? I had an ethanol product from molasses, brown sugar and yeast which was clear. I then added (and feel all information is ...
4
votes
1answer
74 views

Hydrogen's confusing purple glow

While reading about hydrogen on Wikipedia, I read that hydrogen has a purple glow in its plasma state. This confused me because although hydrogen is present in its plasma state on the sun, the sun ...
0
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0answers
51 views

What in Peanut Butter dissolves glue?

There is a common belief that Peanut Butter can dissolve certain types of glue. I've tested it and it does on a few common stickers. A forensic science crime procedural TV show (Bones) made a ...
2
votes
0answers
23 views

A sample of air is trapped in a container at 16.2 psi. If the initial temperature is increased from 10°C to 32°C, what is the final pressure?

this question is on my Gen. Chemistry quiz and I am really confused as to what psi is and how am I supposed to convert it to figure out the final pressure. Any help is appreciated, thank you! A ...
2
votes
1answer
46 views

Why do some old masters paintings deteriorate faster than others?

Specifically, Wikipedia states that Sir Joshua Reynolds' "The Age of Innocence" was painted by the artist over another one of his paintings because the latter was "had suffered some paint losses," and ...
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0answers
65 views

Ozone is above, nitrogen is below

Ozone is heavier than nitrogen. Then why is ozone in stratosphere and nitrogen in troposphere?
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0answers
44 views

It is easier to iron cotton clothes when slightly wet, why?

As the title says, why is it easier to iron cotton clothes when slightly damp ? Has this got something to do with the hydrogen bonding in cotton ?
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0answers
25 views

How does the amino acid profile of Greek yogurt change over its lifespan [closed]

i would like to measure the change in lysine quantitatively over the lifespan of greek yogurt. how can i do that experimentally.