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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Tarnish Removal with Toothpaste

This youtube video (1 mins 40 secs) claims that toothpaste can be used to remove silver tarnish. Is this plausible or effective? If yes, what are the chemical reactions involved? Is it due to the $\ce{...
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Can anyone please list the amino acids giving positive carbylamine test

Carbylamine test are given by primary amines. Will there be any effect on this test because of the presence of -COOH group in the amino acids? Please list the amino acids giving positive carbylamine ...
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What would be a good fluid to use as a comparison to Naptha in a pumping system, where the test bench is in an enclosed space?

We are trying to test a pump to use with Naptha. We need data from a test bench, which we have, but this testing takes place inside a building. Therefore we need something that is safe to use (non-...
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Using the reaction below, calculate how many grams of CO2 is produced from 100 grams of CH4 [closed]

$\ce{CH4 + 2 O2 → CO2 + 2 H2O}$ Round your answer to the 2nd decimal place (hundredths).
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What formulas do I use to solve each of these questions? [closed]

The starship enterprise uses the compound, B5H9 and oxygen gas as fuel. This is the balanced equation: 2B5H9 + 12O2 = 5B2O3 + 9H2O If one fuel tank holds 126 g of B5H9 and the other holds 192 g of ...
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Vitamin C decrease in cooked carrots

Does the decrease in Vitamin C content have anything to do with why Carrots taste different after being cooked?
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1answer
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Do water filters expire even if underused?

This filter rates a 3 month lifespan with 1210 liter capacity, but I expect to filter only 300 liters in 3 months. Is it still expired after 3 months - if so, why? What degrades a filter while it's ...
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Betaine HCl solution at neutral pH

I was trying to make a $2\text{M}$ solution at $\text{pH}\, 7.5$ of Betaine $\ce {HCl}$. I started by weighing out the appropriate amount of Betaine $\ce {HCl}$, added some water and started stirring. ...
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How toxic was this incident? [closed]

I have a big worry that I would really appreciate your opinion on. I just moved in to a new apartment and when I heated up the oven for the first time this horrible very strong smell of Chemicals ...
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Why does whey protein powder make porridge much less viscous?

When I mix whey protein powder into warm porridge (that I cooked in the microwave), the thick porridge becomes much less thick. I searched this, and I found several forum threads discussing this too ...
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Calcium chloride as a drying agent for solutions

I'm aware of the reaction Calcium chloride has with water vapour and how it can therefore be used as a good and inexpensive drying agent but could that be applicable for solutions? For example if ...
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Hazard and precautionary statements

Is there a scientific database where one can find all the H and P statements for all chemicals? I would like to avoid using wikipedia but I can't find a database from a trusted source.
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Chemical Volcano- Experiment

In a science exhibition in 2011 , I and my friend made a volcano that used vinegar and baking soda for the 'effects'. There was another group that made volcano too and they had brought their own ...
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Grade-recovery curve

How would I get the grade for each recovery point in order to plot a grade recovery curve? The only information I have is that the feed grade is 10% valueite (the wanted mineral) and that the ore ...
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The influence of carbon dioxide concentration on microalgae growth rate [closed]

I'm doing an experiment on the influence of carbon dioxide concentration on microalgae growth rate. In this experiment, I have CO2 cylinder and gas mixer. How to decide CO2 concentration by using both ...
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I need some quick help with my homework, since it's due in 2 hours!! Thank you! [closed]

These are the two questions. Any help is very much appreciated!
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Which one of the following reactions is a single-replacement reaction [closed]

Which one of the following reactions is a single-replacement reaction? Group of answer choices \begin{align} \ce{Zn(s) + Cu(NO3)2(aq) &-> Cu(s) + Zn(NO3)2(aq)}\tag{1}\\ \ce{2 Fe(s) + 3 Cl2(g) &...
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Removing wood stain from a ceramic surface

I have a bathtub that I accidentally poured wood stain into. Now the stain is all over the white ceramic surface of the tub. I tried using bleach but it didn't do anything. I'm curious if there is a ...
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Does partially/completely removing solid shift the equilibrium?

For the reaction: $$\ce{P4(s) + 5O2(g) <=> P4O10(s)}$$ Let's say the reaction is at equilibrium, and SOME $\ce{P4O10(s)}$ is removed from the reaction. Will that affect equilibrium? My ...
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Why does dissolved oxygen concentration decrease with increasing atomic number of metals?

I am looking at how metal ions ($\ce{Fe^2+}$, $\ce{Ni^2+}$, $\ce{Cu^2+}$, $\ce{Zn^2+}$, and $\ce{Ag+}$) affect the biochemical oxygen demand in water and used the Winkler's method to find out the ...
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How do we know orbitals of atoms and elements exist? [duplicate]

How would we know if we have never experimentally seen them?
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What spectrum of light does penetrate fog?

I am wondering about what spectrum of light does penetrate fog the best. I would like to know if IR light penetrate fog better than UV light and why is that. Thank you for answers.
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Chemistry Precise [closed]

What would be more precise to find the volume of a cube of metal and why? 1: Measuring cube with a ruler and calculating volume 2: Calculating the water displacement of the cube with a graduated ...
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Why is isopropyl alcohol (isopropanol) used in rubbing alcohol instead of 'regular' propanol?

Is isopropanol (or 2-propanol) a better solvent than ordinary propanol (or n-propanol, or 1-propanol)? This is strongly implied, from what I have read, but I can't seem to find a place that distinctly ...
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Effect of free sulphur on flammability/flash point of extracted ethanol

I am working on a project where ethanol is being removed from wine by spinning. The resulting product will also contain 90ppm of free sulphur. I would like to know whether this will have any effect ...
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Effects of dispersed nitrous oxide on the body

I'm not sure if this question would be more appropriate in Biology SE, but I wanted to know if the euphoric effects of $\ce{N2O}$ are limited to when it is concentrated in the gaseous phase, or ...
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What is the best soft material to withstand prolonged contact with high heat metal?

I want the look of a leather belt around the outside of a metal fire pit (stainless steel). I thought that thick leather would work since it's used for forge gloves, but the prolonged exposure just ...
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Can freezing temperatures cause chalk to fragment?

I am a physics student, with little experience in chemistry. I am researching for a project which involves freezing and its capabilities on humans and different minerals like chalk. I have been ...
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Gummy handlebar grips after one time isopropyl use

Why did one time use of spray-on isopropyl rubbing alcohol 70% USP, make dirty rubber handlebar grips feel gummy after?
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1answer
53 views

Why do bubbles form and stay when I shake a bottle of tea?

I have some bottled tea and I noticed that shaking it creates some foamy bubbles that stay for quite a while (at least half an hour if not more). I originally thought it has something to do with my ...
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Is selenite (hydrous calcium sulfate) dangerous when you grind it up?

I was wondering about the safety of a specific mineral, Selenite. From my research, I have read that selenite is the crystalline form of gypsum, which is hydrous calcium sulfate. I was wondering if I ...
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How efficient is Zinc Acetate as an Oxygen absorber?

I used to work in a microbiology lab and they used zinc acetate as O2 absorber for the anaerobic chamber. Was this an efficient way to scrub O2 from the air? I am asking because I want to make an N2 ...
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Is making play dough without cooking it a chemical or physical change? I have found sites that say both!

The recipe has flour, salt, warm water, vegetable oil, and food coloring. Under the "science" it states that..."When you put all the ingredients for play dough together and knead them,...
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CO2 Catalytic Converter

We all know how CO2, as a greenhouse gas affects the climate and causes global warming. I was thinking of a small device, which could be attached to the exhaust pipe of an automobile. It could convert ...
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Stirring bar cleaning

I have a small question concerning the stirring bars cleaning. I use mine in BOD test wastewater for 5 days and I want to clean them so my question is can I soak them overnight with sodium ...
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1answer
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Help with two containers problem, Xenon

In two containers we have Xenon. The volume of the first container is 2780 L, temperature is 300 degree Celsius, and n = 200 mol. Volume of the second container is 4000 L, temperature is 1300 degrees ...
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Exactly how the subscripted numbers are given to the different types of boron sheets (borophenes)?

I was going to start a project on Borophene, and hence I was going through a review journal, 2D Boron: Boraphene, Borophene, Boronene, where they have said many types of borophenes had been proposed. ...
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How is lapping slurry made?

I've recently gained an interest in the whole topic of lapping and the creation of flat surfaces. Lapping is done in different ways, but the one I'm interested in is essentially just rubbing 2 ...
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1answer
65 views

How to make foggy and cloudy plastic fully transparent?

I used sandpaper of different grits to sand the surface of plastic. The surface is smooth but it looks dull after sanding. I read that one could use toothpaste to remove the foggy look but it did not ...
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Why does charcoal not produce smoke when heated?

As I understand; the reason we have smoke in a fire is because the heat causes wood (or whatever material is burning) to dis-integrate, the disintegrated components react with oxygen to create more ...
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What concentration is phenolphthalein indicator ? 1% or 0.1%

I read some information about phenolphthalein indicator, some websites suggested phenolphthalein indicator of 1%, others mentioned phenolphthalein indicator of 0.1%. What is the difference of both of ...
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Electron Configuration confusion

I'm getting so much conflicting information!! When I practice electron configuration and google to check my answers I often see configurations that list the 3d orbital before the 4s orbital (...
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How do I understand exactly how hazardous a material is based on SDS?

I work with a lab occasionally and get asked often if a chemical is safe to breathe, how hazardous is it if it lands on skin, etc. For the most part, I'll try to go to an SDS and look it up. The ...
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What factors promote honey's crystallisation?

Honey is a complex mixture containing, probably, more than hundred compounds. I understand that the % of those components will affect the crystallisation. However, I am wondering what factors may ...
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170 views

Why is the boiling point of sugarcane juice lower than the boiling point of water?

As the boiling point is a colligative property, one would expect that the boiling point of sugarcane juice should be higher than pure water because Sugarcane juice contains water (75–85%), non-...
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real meaning of osmotic and turgor pressures

I am a high school student and I am very confused in how we define osmotic pressure? Osmotic pressure is defined as the pressure required to stop the diffusion of solvent into a solution by applying ...
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Does carbonation permanently increase the acidity of soda water?

If you carbonate water, and then expose the resulting soda water to the atmosphere and wait until it goes completely flat, will the (former) soda water end up more acidic in final equilibrium than ...
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What is the essence of chemistry? [closed]

I am an engineering student who loves physics but didn't quite enjoy chemistry. a. When I was in high school chemistry to me was something not as inspiring as physics but in which I couldn't solve ...
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1answer
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Are there safe inks that allow one to eat a fish after painting it?

Just came across a specific type of art called Gyotaku where specific types of ink are used to paint over one side of a fish and then a paper (rice paper, shoji paper, ...) is placed on top in order ...
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1answer
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How to thicken Paint [closed]

I'm non technical and have a question that you can hopefully help me out with as I've been searching online and so far haven't found any answered I'm looking for a product that will thicken the ...

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