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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71 views

Why do batteries drain so quickly if they are forced to draw more current than they normally do?

When a battery is pushed to use twice the current it normally does, it lasts for less than half as long before dying... In fact, batteries often come with a 'C' rating that gives you an idea of how ...
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2answers
42 views

Composition of arcanite (potassium sulfate) agricultural grade. Potassium content of random drawn sample?

I bought potassium sulfate from this source: Potassium sulfate granulate I'm using it as a potassium additive in hydroponics. The composition is listed as K2O = 50%, S = 18%. This equals about 41.5% K ...
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1answer
195 views

Is precision measured by significant digits in chemistry?

I was recently asked this question: An experiment is done 3 times, with a different measuring tool used for each time. The results of the experiment are 1.39, 0.9, and 1.0 (all centimeters). Which ...
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1answer
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Why is heroin a more potent drug than morphine, despite having a similar structure?

The structures of heroin and morphine are quite similar, with heroin being formed by acetylation of morphine: Why is heroin so much more potent than morphine, when their structures are so similar? ...
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2answers
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Are food calorie values really integers?

According to what I've seen, fat has a listed caloric value of 9 Cal/g, while carbs and protein have listed caloric values of 4 Cal/g.* Are these numbers exact, or have they been rounded? And if they ...
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1answer
372 views

Can mixing too much citric acid and bicarbonate of soda create dangerous levels of carbon dioxide in the home? [closed]

I am not a chemist. In order to clean hard limescale in my toilet, I usually put down half a cup of bicarbonate of soda and half a cup of citric acid. Someone told me this is dangerous because it ...
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1answer
48 views

Formation of Calcite from Calcium carbonate

So, in lab we are forming the different polymorphs of calcium carbonate. It required us to age the sample that was prepared for the formation of calcite for one week. This sample mixture was suspended ...
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0answers
179 views

Freezing point of solution of Water, Ethanol and Sugar (aka, Limoncello)

I'm looking for a diagram of the freezing point of a water solution depending on its content in sugar and ethanol. More colloquially, I want to know how to balance alcohol and sugar so that my ...
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0answers
59 views

Adding acid to hard water to prevent limescale deposition

Acid is commonly used to remove deposited limescale. If I wanted to prevent build-up of limescale in appliances, would it make sense to add acid to the water in the first place if that doesn't harm ...
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2answers
368 views

How to neutralize the stink of decomposed fish?

Recently I discovered for myself an interesting way to easily produce home made plant fertilizer that is quite effective (tested myself on the plants). It's fish emulsion (so can be used also in a ...
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How much oxygen is used up by the browning of an apple?

This is inspired by a recent popular question on Cooking. Let's assume that I take some apples, cut them up, and place them in a hermetically sealed container. Then the container goes into the fridge. ...
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2answers
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Controlled burn with colored flames (Gender Reveal) [closed]

Is there a single solvent that can dissolve chemicals/elements that when burned, will produce the color of its respective chemical/element? If so, what chemical/element can be dissolved in this ...
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1answer
41 views

Creating 100mg/L aspirin solution

I plan on creating 100 mL of 100mg/L aspirin solution by dissolving 10 mg of pure aspirin powder in 100 mL of buffer solution (of different pHs). Problematically, aspirin doesn’t tend towards ...
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1answer
194 views

What exactly is peptone (tryptone?) and why does it not get precipitated?

According to Wikipedia Peptone (also called Tryptone) is a form of amino acid that has been treated by stomach acids. According to Google it also stays in solution when treated with acids or heat. Why ...
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931 views

What happens when Isopropyl alcohol expires?

My isopropyl alcohol is expired. What happens when it expires? Does it break down into something else? Can I still use it to clean or sanitize?
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Remembering Chemical formula [closed]

How do you all remember the name of chenical formula of Glucose, Lime, Vinegar ... etc. becasue these substances have big big chemical formula. So, How do I remember their chemical formula?
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1answer
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Formation of Goethite

Probably a simple question: When you're mixing potassium hydroxide ($\ce{KOH}$) with iron nitrate ($\ce{(FeNO3)3}$) to form ferrihydrate, does the temperature have to be below $\pu{60 ^\circ C}$?
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4answers
369 views

Can you steam clean your range hood, by adding dishwashing liquid to boiling distilled water?

My grandparents physically can't remove their Sakura R-727II range hood that lacks any filter. Because of COVID-19, no handyperson can visit their house. But their range hood is now clogged and ...
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1answer
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Why are all 3 of propane, butane and isobutane used in deodorant sprays?

Here are the back ingredient labels of a few popular commercial alcohol-based deodorant sprays. As one can clearly see, they all have many things in common, but the 3 which are of importance in lieu ...
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1answer
209 views

Biodegrability of straight chain and branched chain detergents

From NCERT Chemistry: Textbook for class XII, Part II [1, p. 461]: Main problem that appears in the use of detergents is that if their hydrocarbon chain is highly branched, then bacteria cannot ...
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1answer
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Vinegar reaction [closed]

please could someone help me. I poured white vinegar over a small hole where ants where coming out in my patio steps. There was some sand on the step and it started to bubble and fizz. We have been ...
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1answer
70 views

Silver "polish" with aluminum foil left a hard yellow coat [closed]

I cleaned my silver teapot with the aluminum foil-baking soda-hot water method. Usually this works well on my silver plated flatware. However, this time it left a hard yellowish coating. I was only ...
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1answer
77 views

Is it safe to launder clothing that had a small amount of isopropyl alcohol on it? [closed]

I just have a safety question. I work in a clerical position at an outpatient office located in a hospital. Since mid-March when the pandemic began to hit our state, we’ve been wiping things down in ...
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3answers
145 views

Why water cools from outside to inside?

It is a well-known fact that Water kept in a container, on cooling, results in freezing with initially at the circumference of surface (1D), then on the surface (2D) and then throughout the volume (...
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molecular orbital theory explaining molecular orbitals [closed]

i am a high school student,,and i am confused in molecular orbital theory,,,my confusion is that how bonding and non bonding orbitals are formed at the same time my teacher taught me that the two wave ...
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0answers
240 views

Why does a sealed plastic bag of dish soap, water and air expand when shaken?

I've noticed that when I put dish soap, water and a little air into a sealed plastic bag, and then shake the mixture, it forms soap suds and the bag expands significantly in volume. Why does it expand?...
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4answers
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Can we fill potato chips bags with a gas other than nitrogen?

I understand that we fill potato chips bag with nitrogen to prevent oxidation. But why do we use nitrogen, instead of neon or hydrogen or something else? My first guess is that nitrogen is lighter ...
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1answer
660 views

What could be causing my bath salts containing baking soda to explode out of their containers?

I run a small herbal wellness business and one of the products i sell are bath salts containing baking soda. The base ingredients are Epsom salts, Dead Sea salts, magnesium chloride, baking soda, ...
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1answer
124 views

Aluminium in homemade liquid castile soap? [closed]

I made some liquid castile soap in a slow cooker. There was a slight scratch in the non-stick surface of the container. I read that potassium hydroxide when coming into contact with aluminium ...
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1answer
138 views

Can someone explain this question in detail? [closed]

An infusion stated to contain 0.95% w/v NaCl was diluted so that its Na content could be determined by flame photometry. The following dilutions were carried out: 10 ml of the sample was diluted to ...
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1answer
909 views

Is alcohol based sanitizer flammable? [closed]

After applying sanitizers can they catch fire, if yes, then after what time is it safe to use the hands, say in the kitchen. Also one more question is that if they are flammable then the flammable ...
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1answer
98 views

Home made PCB tinning solution [closed]

By reviewing a couple of articles and videos I decided to give some try to develop a PCB tinning solution at home. Based on most of the articles, the easiest way to develop this solution is by using ...
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1answer
56 views

Can submicron mould particles go through building structures, non permeable foil paper? [closed]

I read that submicron mould particles and vapours related to mould can go through walls, floors and ceilings? Is this correct?
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Safe reaction to maintain 30psi (2 bar) of gas, while that gas is released at random?

I'm going to use it to power a Lego Pneumatic Engine (LPE) (random example, not mine), that will be self-contained, and start and stop a lot using a throttle valve. So the requirements are: Use ...
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0answers
3k views

Isopropyl Alcohol Vs Acetone for Dissolving Organic Contaminants on PCB

Acetone is widely used in the labs as a solvent to clean the vials and tubes as it is good solvent for organic materials. While Isopropyl alcohol is used as a rubbing alcohol for cleaning contaminants ...
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1answer
114 views

Baking Soda and Vinegar: Are there any secondary reactions?

I want to run a Lego Pneumatic Engine on the CO2 that is produced, but before I do, I want to be sure that that's the ONLY gaseous product from a real-world reaction. Everyone seems to assume that it ...
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2answers
431 views

What is the difference between enthalpy change and energy change? [closed]

This question seems really dumb but I rather be safe than sorry. I read about enthalpy change in my chemistry textbook which defines enthalpy change as the energy exchange between a chemical reaction ...
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0answers
42 views

Lowering the freezing point of a lipid by adding another lipid

I'm trying to stop bacon grease from congealing in the fridge by adding another lipid with a lower freeze point to it, but I'm not sure how much to add, as I'd like to keep the ratio as bacon-grease ...
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3answers
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Does motor oil get more viscous when heated & what is the meaning of the SAE motor oil code?

The motor oil in my 2004 Pontiac Vibe is 5W-30. My (incorrect) understanding of this SAE nomenclature is that 5W means "Viscosity index of 5 in the winter" (or when really cold - like $\pu{-30 ^\...
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1answer
36 views

What would weigh more? A ice cube or water, if the ice cube is from the same amount of water [closed]

So if I frozen 50 ML of water, it turns into ice cube. Would the ice cube weigh the same as the 50 ML of water it was before?
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2answers
236 views

Is C4O5 possible?

I have searched all over the internet and I have found no specific answer. I just want to know if C4O5 is possible and what would it be called.
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1answer
109 views

Why And How are Unbranched chains of hydrocarbons easily biodegraded?

My chemistry textbook says If detergents are highly branched then they can't be easily degraded by bacteria.So,nowadays the branching of hydrocarbon chain is controlled and kept to a minimum. Upon ...
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1answer
596 views

What ratio of 73% calcium hypochlorite powder to water mimics the strength of sodium hypochlorite (bleach)? [closed]

Calcium hypochlorite is sold as pool shock in varying strengths. I've read that it can be dissolved in water to create a 'bleach' (typically sodium hydrochloric or sodium hydroxide) and is often used ...
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2answers
597 views

Why is HCl the acid of choice for swimming pools?

Why is muriatic acid the go to acid to put into pools? Does it work better than nitric acid, sulfuric acid, or another strong acid? I mean they all will add the same amount of H+ right? Note, we use ...
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2answers
120 views

What are chemical bonds made of, and how do they form? [duplicate]

All atoms are linked together by chemical bonds, but what are the bonds themselves made of? I'm sorry that's a stupid question, but I'm only 14, and haven't entered high school yet, and my science ...
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0answers
152 views

Is there an adhesive that is not dissolved by acetone?

I am trying to glue glass sheets together to make a sealed 13" x 13" x 13" box. Inside this box there would be acetone gas used to melt 3D printed parts to make them more durable. Acetone will remove ...
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825 views

How is octane rating defined for negative values and those over 100?

Based on my reading, the octane rating for a given fuel is calculated by finding the compression ratio at which it knocks and finding a mixture of $X\%$ isooctane and $(100 - X)\%$ n-heptane which ...
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1answer
182 views

if we mix bleaching powder in water will this be converted to Sodium Hypochlorite? [closed]

if we mix bleaching powder in water will this be converted to Sodium Hypochlorite ?
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1answer
2k views

Is bleaching powder same as Sodium Hypochlorite? [closed]

i want to know is Sodium Hypochlorite is same as bleaching powder. can some one please let me know.
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1answer
33 views

If the gaseous molecules didn't have any kinetic energy would the surface of a filled balloon still be firm? [closed]

The most of the ideal gas law equation is based on the fact that the gaseous molecules are moving around and cause collisions and thus have some pressure. If these molecules were to not have any ...

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