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.

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147 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 ...
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1answer
144 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 ...
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1answer
68 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 ...
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1answer
44 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/...
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2answers
57 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 ...
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2answers
527 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 ...
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1answer
117 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 ...
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1answer
1k 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 $\pu{1mm}$...
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2answers
3k views

Why does lavender oil dissolve plastic?

A few weeks ago I decided to harvest the lavender in my garden and put it through a still to extract the essential oils. The still in question is essentially just an air cooled condenser. I collected ...
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1answer
2k views

Full equation when using vinegar, hydrogen peroxide, and salt to etch copper

What is the full chemical equation when you use the following reactants to etch copper: vinegar / acetic acid (5%) $\ce{CH3COOH (aq)}$ hydrogen peroxide (3%) $\ce{H2O2 (aq)}$ salt $\ce{NaCl (s)}$ ...
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197 views

Is sodium “also known to turn purple and combust (like lithium),” when exposed to water?

I understand that indicator solutions can change color depending on pH, but the following statements in the Phys.org article Super cheap earth element to advance new battery tech to the industry has ...
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1answer
56 views

What chemicals are often confused for different chemicals? [closed]

Recently I asked a similar question on Chinese SE: Why would Antimony (Sb) and Aluminum (Al) be confused? It seems, though, that this is by no means a Chinese phenomenon. The Wiki page for Tin ...
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42 views

Compensating for hardness in aqueous NaOH solution?

I'm trying to strip the seasoning (polymerized oil) off a carbon steel skillet. Following online instructions, I've prepared a lye solution, using tap water, 2.5% concentration by weight, which ought ...
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3answers
619 views

Can 32% hydrochloric acid be stored in a milk jug (HDPE)?

Can $32\%$ ($20$-degree Baume) hydrochloric acid (typically found as 'muriatic acid' in hardware stores) be stored in a milk jug? I have read that acids can be safely stored in polyethylene bottles. ...
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2answers
265 views

How to purify sodium chloride table salt that contains sodium ferrocyanide

I wish to obtain pure sodium chloride crystals from ordinary table salt. But all proprietary table salts seem to contain the anti-caking agent sodium ferrocyanide which I should like to remove.
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120 views

Why is cooking not potentially lethal? [closed]

Even the simplest ingredients used in cooking, such as a banana, contain hundreds of chemical compounds. When we cook we mix several of these ingredients and apply heat, which makes a perfect ...
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1answer
515 views

Rules of naming ionic compounds

While brushing up on my Chemistry basics, I came across a topic about naming ionic compounds. It is a question regarding Roman numerals. It says "Roman numerals should not be included in the name ...
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1answer
497 views

Classification of the Inside of a Grapefruit

In the text Chemistry: The Central Science, the inside of a grapefruit is classified as a homogeneous mixture. Unless I’m missing something, to me it would be a heterogenous mixture owing to pulp, ...
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77 views

Is *rinsing* (after washing) with cold water is as efficient as rinsing with hot water?

Let say I have, a dishwashing soap, plenty of cold water (5 °C) and only have 2 L of hot water (60 °C) to clean a t-shirt with oil stains. Should I use the 2 L to wash the t-shirt and then the cold ...
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1answer
28 views

Effervescent in mineral spirits?

I'm shooting video of paint moving in mineral spirits. To make for a little more action, is there a household granular/solid I could add to the mineral spirits that would gently effervesce ala alka-...
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1answer
99 views

Why does the liquid in an Oralmedic stick flow uphill after I turn it upside-down?

I was experimenting with an Oralmedic stick, which is basically a cotton swab with a hollow stick that has liquid medicine inside, and observed something very unexpected. I followed the usage ...
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2answers
5k views

What causes the “rotting fish smell”?

Rotting fish seem to give off the same (very pungent) kind of smell, regardless of the kind (salmon, seabreen, tuna, etc). What exactly is it that's responsible for this unique smell? (Though I've ...
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0answers
68 views

Bio dishwashing liquid affecting kitchen pipes?

I have a query regarding bio washing-up liquid. We've recently experienced slow flow in our kitchen drain pipes, and the plumber whom we asked to have a look at them showed us there was some non-...
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1answer
75 views

Stoicheometry questions: I've been having a bad time not understanding the questions and how the steps are to achieve the answer. please help [closed]

Cetyl palmitate (C32H64O2) is a waxy solid and is the main component of spermaceti, the once prized wax found in the skull of sperm wales. The heads of sperm whales can contain up to 1900 L of ...
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1answer
598 views

After boiling water in an electric kettle, should I empty it?

(I'm reposting my question from Physics SE where it got closed for being off-topic, but chat tells me that it might be on topic here.) In the office I'm working in, there's an electric kettle for ...
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0answers
41 views

Disposal of methanol solution [closed]

Can I add a 4 L bottle of methanol solution with 0.1% formic acid into a drum containing non-halogenated waste?
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1answer
44 views

Are detergents more efficient if poured into more water?

Let's say, I am washing my cloths "by hand". My steps would be: I take a basin of about 20L I pour into it some water I pour my detergent (the required amount, about a spoon) and a bit of bleach ...
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0answers
892 views

Citric acid rust removal and neutralization

I'm currently removing rust from steel with citric acid dissolved in water. I generally use a wire brush as the final treatment to remove any surface rust that the acid loosened up. The pieces under ...
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0answers
27 views

I mixed Miracle Gro fertilizer and Soil Mender Liquid Fish in my hose-end sprayer to save time. The mixture became very cold. Why?

Miracle Gro = Ammonium Sulfate, Potassium Phosphate, Potassium Chloride, Urea, Urea Phosphate, Boric Acid, Copper Sulfate, Iron EDTA, Manganese EDTA, Sodium Molybdate, Zinc Sulfate. Soil Mender ...
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2answers
79 views

What is the chemical reaction between coins (copper and nickel) and polyvinyl chloride?

I often carry coins in a cheap plastic sandwich bag. A green solid soon appears. Is it copper oxide? How is the polyvinyl chloride greatly accelerating the reaction? Are there other chemicals being ...
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1answer
134 views

Maximum possible hypochlorite concentration from electrolysis?

For reference, "electrochlorination" is just the electrolysis of a simple solution of water and table salt (NaCl) followed by reintroducing the chlorine gas produced. But, the Wikipedia article on "...
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1answer
29 views

Can activated charcoal be used to filter bacteria out of air? [closed]

As the title says: Can activated charcoal be used to filter bacteria out of air and or gas?
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1answer
84 views

Sargassum seaweed affects porcelain?

We are inundated with Sargassum seaweed here in the Virgin Islands right now. It has a pungent sulphur odor as it decomposes. Coincidentally (or NOT) the porcelain tubs in the condos I work at are all ...
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1answer
127 views

Safely lowering bleach pH without chlorine gas?

According to Eurekalert, by lowering the pH of household bleach (e.g., by adding vinegar or citric acid), we can increase $\text{[HOCl]}$ and consequently greatly improve the disinfecting capabilites ...
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0answers
188 views

What occurs when stannous fluoride is combined with baking soda in the oral cavity?

I have googled this question in many forms over many months repeatedly. For some background, when stannous fluoride is combined with water, it forms precipitates and/or oxidizes, rendering it less ...
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1answer
37 views

Lyophilization Advantage

I've been reading about freeze drying and how it increases the shelf life of certain foods and is overall a good preserving technique. My question is with regard to the actual process. I understand ...
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1answer
608 views

Is there a substance that hardens in water? [closed]

Im trying to invent a product that starts as a liquid but when exposed to water it hardens. Is there any chemicals that can cause this reaction??
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1answer
41 views

How heat makes raw food become eatable? [closed]

How can heat cooks food? My classmate asked me this but I didn't imagine how it works.
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1answer
98 views

'Alcohol Free' toiletries

Sometimes I see 'alcohol free' written in big letters on toiletry bottles, such as on deodorants and shaving foams. You would think that the toiletries bearing these words contain 100% no alcohol, ...
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2answers
78 views

How to find the mass of the following solution? [closed]

What is the weight of a 1L of 0.5M solution of NaCl? Is it the whole solution weight 29.22 grams?
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1answer
41 views

Turning Soda Glass into Lead Glass and Fused Silica [closed]

What would be the method of turning Soda Lime Glass into: A. Lead Glass B. Fused Silica Soda Lime Glass is $\ce{SiO2}$ ~70%. Lead Glass is $\ce{SiO2}$ ~ 62.9%. Fused Silica is $\ce{SiO2}$ ~ ...
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2answers
213 views

Predicting products of chemical equations? [duplicate]

Consider the equation $\ce{2 NaOH (aq) +Cl2 (g) —> NaOCl (aq) + NaCl (aq) + H2O (l)}$. How would one know the products of this reaction? Is there a general way of doing this? I would have no ...
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0answers
400 views

Why do gnocchi float when they are cooked?

Gnocchi is a kind of pasta made with flour, potatoes and eggs. They are cooked in boiling water and when they are ready to be eaten they float. Why do they float when they are cooked? I found two ...
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1answer
67 views

How does salt push out the water from vegetables, meat, etc.?

Where can I find out, how does this process work? Have you noticed, that when you salt mushrooms, eggplant... or add sugar to lemon - some "juice" comes out. Any explanations? Or maybe name that ...
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0answers
60 views

What does borax do in and to the washing machine? [closed]

Does borax actually do anything to make clothes cleaner? If it does .... Does it do something with the detergent to remove more dirt from clothes? Does it make it easier to rinse detergent and dirt ...
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1answer
72 views

More effective fire extinguisher liquid than water

I join robot fire fighting contest. One of the mission is to extinguish candle by spraying it with liquid (water is default option). For spray mechanism I use pump with Venturi effect principle. Is ...
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1answer
66 views

Is food color E-132 indigotine, carcinogenic?

I have seen different opinions on food color E-132 Indigo carmine (indigotine, FD&C Blue 2) if it forders cancer.
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1answer
2k views

Why does adding salt to boiling water cause it to flare up suddenly?

I was expecting that the water would become less "boily" since the ions in $\ce{NaCl}$ would require energy to disassociate. Instead it turned whitish and the water level suddenly rose and then ...
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1answer
142 views

Is instant coffee an impurity when you add it to water? [closed]

I have this question for chemistry, but can't know whether it is an impurity or not, please help.
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2answers
297 views

Does hydrogen peroxide - urea become more active when illuminated?

Dentists' tooth whitening systems and consumer kits use gels containing carbamide peroxide, also known as hydrogen peroxide - urea. Dentists use a light activator: (image from Wikipedia). Consumer ...