Applications of chemistry to reagents and reactions of everyday life.

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How to do Concentration [on hold]

Suppose that the molar concentrations for CO and H2 at equilibrium are [CO] = 0.05 M and [H2] = 0.05 M. Use the formula you found in Part B to calculate the concentration of CH3OH
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What are the physico-chemical processes at play in ironing of clothes?

The process of ironing of clothes removes (to a large extend) the wrinkles that where introduced in the clothes while drying. Obviously this has to be some physico-chemical process that is ...
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Simplest way to balance any chemical equation

In your opinion, what would be the simplest way to balance any size of chemical equation? For example here is an equation: $$\ce{C12H26 + O2 -> CO2 + H2O}$$ I saw some ways by putting letters ...
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What are some good research topics for a high school student?

I absolutely love chemistry and I really want to take part in science fairs. I am also taking an AP chemistry class. Cleaner fuel and energy sources and air pollution (especially due to smog and ...
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endothermic dissolution process

Can anybody give me an example of an endothermic dissolution process, preferably one in which name of the substances involved are easy to remember. I have searched the Web thoroughly but could not ...
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37 views

What is going on when pen stops working on a section of paper?

Ever had a ballpoint pen that would all of a sudden hit a 'dead spot' on a sheet of paper and refuse to write? It's clearly not the pen, because when moved off to the corner it would draw perfect ...
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How to dissolve steel without affecting aluminium alloy

Disclaimer: I have very limited knowledge of chemistry My problem is the following: I have motorcycle part made from some sort of Aluminium alloy - most probably 6005, 6061-T6 or 7005. And inside of ...
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How to Find Each Element in Nature

I tried to google this but 'element' as a programming term complicated the search. I'm looking for a site or article that covers how one would find each element in nature, in its most abundant form. ...
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Is decarbonation of water exothermic?

I am interested to know if the reaction is exothermic or endothermic.
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Double Displacement Reactions that produce gas [closed]

What type of double displacement reactions can form a gas. How can i determine if a double displacement reaction will form a gas?
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Chemical Formulas of Acids and Bases [duplicate]

How can we identify bases and acids by their chemical formulas? Take for example this reaction. I know that HNO3 is an acid and KOH is a base, but if I didn't know that how would I be able to ...
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Using Activities and extended Debye-Huckel equation, find the ph of the solution 0.020 M NaCl

This is from a study guide for an exam coming up. So the Question is: Use activities to calculate the pH of each of the following solutions, being sure to use $\alpha$ values and the extended ...
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C + O2 is equal to C + O, how is that possible

C + O = CO2 . This is because carbon has valency of 4 while oxygen has valency of 2. When they react the valencies are criss crossed which means we will get C2O4 but this is simplified to CO2. But ...
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Boiling point of a liquid increasing with temperature?

In my textbook, a statement is given, as follows: Boiling point of a liquid increases with increase in temperature However, I was wondering, isn't this wrong? The boiling point of a liquid ...
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Incomplete Combustion products

In class we performed an experiment which I am unable to understand the results for Why does the the amount of soot produced vary? What is the amount of soot produced dependent on? ** Experiment: ...
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Figuring out the theoretical mass of reactants?

Hi Stackexchange Community, I'm working on my chemistry lab report. The initial instructions were to test the hypothesis that the mass of products of a reaction will equal the mass of the reactants. ...
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Does potassium aluminum sulfate have any effect on sexual performance/sperm counts or anything relating to the functionality of the sexual organs?

I recently read about potassium aluminum sulfate that it has astringent property and has the ability to constrict body tissues and restrict blood flow. Since, for penis, the erection happens with the ...
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Most common material in the universe

I was told that 'water' was the most common material in the universe and I disputed that claim. I was met with the argument that hydrogen and oxygen were the most common atoms in the world so water ...
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Why does sweetening milk need less sugar as compared to tea?

If I have a cup of milk and a cup of tea; to get them to a sweetness I like, I usually add less sugar to the milk as compared to the tea. Why is it that milk needs less sugar to be just as sweet as ...
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What purpose do chain reactions serve?

I just learned what chain reactions are, but I can't seem to wrap my head around them because it seems utterly useless and doesn't accomplish anything. At least that's how I understood it because the ...
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Does water really 'go bad' after a couple of days?

Among my friends it is a sort of 'common wisdom' that you should throw away water after a couple of days if it was taken from the tap and stored in a bottle outside the fridge, because it has 'gone ...
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How do I perform a gravimetric analysis of Portland cement?

To determine the silica ($\ce{SiO2}$) content in Portland cement by gravimetric analysis it is digested in $\ce{HCl}$ and the silica residue is eventually measured. The chief constituents are ...
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Write an equation to show how HC2O4− can act as an acid with HS− acting as a base [closed]

Write an equation to show how $\ce{HC2O4^{−}}$ can act as an acid with $\ce{HS^{−}}$ acting as a base. Express your answer as a chemical equation. Identify all of the phases in your answer.
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why do battery leaks still happen [duplicate]

Battery leaks was an issue in the 80s and 90s, and since quality and innovation is constantly improving, I thought battery leak might be slowly going away. But I found that even nowadays, name brand ...
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Oxyhydrogen applied to a catalytic converter

Recently people have been reporting that if you blow 'HHO' gas (Oxyhydrogen) into a used catalytic converter it gives off excessive heat. Look here for any number of examples. There is a suggestion ...
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Do soap molecules form liposomes?

I know soap molecules form micelles. Do they also form liposomes in water? I need the reasons too.
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How can I make an acidic pen to burn paper on writing on it?

If I have a pen with refillable ink, can I just pour in concentrated Hydrochloric acid or concentrated sulphuric acid in the ink chamber to make it an acidic pen? Would it be better to use the acid ...
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Can dust conduct electricity?

Just out of curiosity, can dust conduct electricity? The source of dust varies, is there any form of dust that can conduct electricity?
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Molecular formula for 4-methyl-1-pentanol?

According to Wikipedia 4-methyl-1-pentanol is $\ce{C_6H_{14}O}$. But here is what I got, which is slightly different. Methyl = Think of methyl group, which is $\ce{CH_3}$. Pentanol = Penta means we ...
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Why can potassium hydroxide not be used to remove atmospheric carbon dioxide?

As we know that $\ce{KOH}$ absorbs $\ce{CO2}$, then why can't it be used to remove the excessive $\ce{CO_2}$ present in the atmosphere?
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Is the scientific explanation behind Smartkleen legit?

I'm trying to have a conversation/debate about the SmartKleen laundry detergent alternative, but lack the knowledge to understand if their explanation is science or pseudoscience. Far Infrared ...
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1answer
57 views

What chemical reaction can cause this blue-ish deposit?

Recently I noticed that some of our glasses and cutlery had developed a blue-ish deposit as you can see for the two sets of spoons below. For each set the spoon on the left has the blue-ish deposit ...
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Flavor transference through the air and plastic bags

I am not sure if this is a chemistry question; however, I was wondering: In my desk I have two plastic, zip-lock bags. One contains cinnamon tea, the other contains nuts. After about a week of ...
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How do I work out the amount of H+ ions in a sodium hydroxide and water solution?

I know the $pH$, pressure, temperature and concentration of the solution. Is there a method I can use to work out the amount of $\ce{H+}$ ions?
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What would explain urine that resists freezing?

A frozen urine specimen is required for an organic acids lab test, but the urine refuses to freeze after 4 days in a regular freezer turned as low as it will go. What would explain this, and how cold ...
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What is the reason a grain of salt alters the perceived bitterness of coffee by such a high degree?

Coffee served hot can be quite bitter (presumably high pH). Several people I have known will add a single grain of salt to the coffee - which reduces the perceived bitterness. My question is: What ...
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For a given teabag and dunking duration - will I get more caffeine in a bigger cup or the same amount?

When choosing a cup of tea, I can choose a big cup or a small cup. I'm wondering if I get more caffeine with the bigger cup or the same amount of caffeine. (in moles) My question is: For a given ...
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What is the smell of 'burning' metal?

When a pass a construction site where someone is welding two pieces of metal together there is a very distinct smell that I associate with 'burning' metal, although I am not quite sure it is burning ...
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Why don't B, C, Si, have ionic forms?

Also, why can some elements such as Fe have different ionic forms such as Fe2+ and Fe3+? What determines each form?
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general chemistry 2 heat of vaporization

Question 1. A 20.0 gram sample of n-propanal requires 9.748 kJ of heat to change from the liquid to the gas phase at its boiling point temperature. Show using these measurements a calculation of the ...
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How to achieve clean dishes and glasses?

I heard that there is a standard about cleaned glass, namely Chemically clean glass supports a uniform film of water, with no hanging droplets visible. I tried to clean my dishes at home using ...
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Epsom salts - heavy metal contamination myth?

This recipe for home-made handwash (liquid soap) consists of bar soap, water, Epsom salts, and coconut oil. The author specifically warns against using 'artificial' Epsom salts, preferring the ...
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Why can we smell copper?

If I can smell an object, it means that molecules of it are getting separated from it, so they can reach my nose. As far as I know, metals don't sublimate, especially not in room temperature. However, ...
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What is the nature and character of fire? [duplicate]

What is fire? Is it a material or energy or something else? Please explain it to me. My friend asked me this. I am stuck with this problem.
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Spices are absorbed or adsorbed in food?

When we cook food, we add several spices and condiments which enhance color, taste and smell. Are these spices and condiments just adsorbed on the food particles ? Or are they absorbed ? For example ...
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Non-hardening adhesive

I am wondering if any of you know about glue/adhesives that do not harden over time after they are applied or glue/adhesives that take a really long time to harden after application. I need the glue ...
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What molecular features create the sensation of sweetness?

There are many compounds that taste sweet. Many of the artificial ones taste much sweeter than natural sugars (which is why they contribute little to energy intake when use as sweeteners). A range ...
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Is it safe to mix potassium alum powder with magnesium oil (made from water and magnesium flakes)?

Will mixing these two together cause a reaction of any sort? If so, is it safe and is there an order in which one should be added to the other?
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Hard coating for soft surface

Say I have a soft, possibly porous object. I want to coat it with a material, Resistant to boiling water and some scraping Not hazardous, at least after the coating Largely transparent The idea is ...
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What's the reddish powder that oozes out of a black rock?

As an artist, some of the work I do involves the use of seashells, sea rocks/stones, etc. I picked up a black rock from shore at one of the beaches here in Florida and it looked somewhat clumpy with ...