Applications of chemistry to reagents and reactions of everyday life.

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556 views

Does ice melt faster when submerged in water?

Suppose you have a container with a drain at the bottom full of frozen H2O which you leave a room temperature to melt. Will the ice melt faster if you drain the water as it melts? I would expect that ...
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33 views

Are homemade batteries a practical alternative during a blackout?

If your home lost power without warning; are homemade batteries (such as the lemon/potato variety described in this question Are homemade batteries economically practical?) a practical alternative for ...
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336 views

Are homemade batteries economically practical?

Every kid who has been to a science fair knows that you can make a battery with a lemon, a potato, a penny and a nail. I've never done this and I'm not entirely clear on how it works beyond a hazy ...
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1answer
23 views

Which azo compounds are found in DVD-R and CD-R media?

Does anyone know which specific azo compounds are used in DVD-R/CD-R recordable media?
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1answer
16 views

Chemistry of Walter Mitty's negative developer/stop bath/fixer?

I asked a question here How can Walter Mitty examine the negatives of photos in the bright sunny day? Commonly known, there are three steps using chemical baths to bring out the images of negatives: ...
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1answer
24 views

can sodium persulfate etch or damage a titanium heater?

I use Sodium Persulfate to etch copper on a PCB process. I have been using glass heater on the etching tank but the glass is too fragile; it breaks too easily. I read that titanium heater is used ...
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37 views

Are there any hazardous products that would come from mixing glass cleaner with lubricant?

Are there any known safety issues if you mix: Mr.Muscle glass cleaner GT85 spray lubricant
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33 views

What is the chemistry of this household cleaning recipe?

What would be the product if baking soda and common salt and vinegar are added together?
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1answer
14 views

Are salt substitutes good alternatives to sodium chloride?

I bought a low salt Ketchup from Heinz and it says it uses 'ALSOSALT' substitute ( potassium chloride). It says it does have 5mg. of sodium. Is potassium chloride (with possible additives) a good ...
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54 views

Why do other sugars melt whereas sucrose decomposes?

Sucrose decomposes at 186°C. It doesn't melt but when it reaches decomposition temperature, sucrose decomposes into fructose and glucose. After cooling and hardening it is no longer sucrose. Am I ...
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53 views

Is it possible to remove salt from food without changing the flavor?

I love soup, even a thick soup for dinner, yet many soup products have 400 to 1000 mg of sodium in them. Is there a simple chemical procedure any consumer could do to take the sodium out of the ...
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1answer
61 views

How could household vinegar create a salt on car carpet?

I am not a chemist! My chemistry classes from my molecular biology undergrad are far behind me. But I think I created a salt, and I don't know how. Here is my mystery: I recently got some water in my ...
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63 views

If salt crystals make a cube shape, what is this 'X' marking?

I am an amateur, with very little professional chemistry knowledge. I was doing a demonstration / experiment with my 6 year old child. We took very warm normal tap water, and dissolved into it a ...
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16 views

Thermal Decomposition of metal oxides

Does thermal decomposition of metal oxides always produces oxygen?
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28 views

Recipe for paper glue

I need to produce paper bags. Is there any simple receipt for making paper glue so that brown (packaging) paper will stick to itself?
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20 views

How to dissolve grass/leaves without affecting enclosure?

I've got two questions: What sort of compound can dissolve grass/leaves fastest without leaving "much" trace? What sort of enclosure is required for this to be doen safely and without damaging the ...
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2answers
156 views

Why does pasta really boil over?

I was making pasta, and I noticed the pasta boiling over. I thought about it some more, and I realized I had no idea why this was happening. When the lid is on, the foam rises. When the lid is off, ...
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1answer
30 views

How do erasable pens work?

I understand the principle behind an eraseable pencil. Graphite is highly slippery, you rub it onto the paper, and an eraser can rub it off again. I've had friends at school with 'eraseable ink ...
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2answers
48 views

How does a simple alkaline battery work?

The basic + - electrolyte set up. Modern batteries and the like. How exactly do they work?
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25 views

How does hydrogen gas build up in hot water lines?

Recently I was reading through the owner's manual of a washing machine; notably, the warnings in the front of the booklet. One warning stood out to me; it said that if the hot water in your house has ...
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0answers
25 views

ice cream float - what causes it? [duplicate]

When you mix ice cream and a soft drink (like coke,) a reaction happens that creates a thick foam. I am assuming the foam id composed of carbon dioxide gas and milk curd, which is produced by the ...
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2answers
29 views

How many mL of solution will result when 15.0 g of H₂SO₄ is dissolved to make a 0.200 M solution?

How many $\mathrm{mL}$ of solution will result when $15.0~\mathrm{g}$ of $\ce{H2SO4}$ is dissolved to make a $0.200~\mathrm{M}$ solution? Here's what I have so far: First, I converted ...
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3answers
57 views

Which electrodes do not corrode at all?

I had used spare pieces of metal to perform electrolysis. They all had the disadvantage that they corrode when used as anode - and some of the oxides are toxic (copper, chromium). I've found that ...
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1answer
21 views

Loading nickel metal hydride battery for the first time

I just bought a new hair clipper and I was about to start shaving my head when I noticed that it was almost at 0%. It has a nickel metal hydride battery. The manual says I have to load it for 24h ...
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31 views

What the balanced chemical equation for the conversion of starch to dextrin by dry heating?

This question is related to the toasting of bread. When we toast a slice of bread, the starch in it breaks down into dextrin. I want to know the balanced chemical equation for the process.
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72 views

Real life chemistry question

My freshwater fish tank has a pH of 5.8 and a KH value in excess of 40 or 720+ppm while still maintaining a water hardness of 20 ppm or GH< 1 now I am a math/phsyics student but I have taken both ...
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44 views

From liquid to solid by beating

I understand how liquids can become solids by decreasing temperature. To my understanding this is because the molecules slow down and are able to form bonds. However, I'm having problems ...
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49 views

What's a natural substitute for baking powder or baking soda?

What's a natural substitute for baking power or baking soda? I am doing a project where I need a raising agent in liquid form. Naturally, I can't use anything carbonated so baking powder/soda are out ...
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1answer
28 views

Do various soaps work better when dissolved/used in different water temperatures?

My wife and I have had an ongoing argument about various cleaning agents, and I wanted to get a Chemists' view on it. When we are doing laundry, she will generally clean using the cold water setting ...
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1answer
47 views

Does a patina on a knife prevent rust?

Before I begin, I think it's worth mentioning that I know little about chemistry and even less about knives. My question is this, having seen many people talk about how patinas work and the best ...
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3answers
173 views

Demountable simple fume hood

I found this build-plan recycling on the internet (I believe it was originally published in a book written by the infamous clandestine chemist Hobart Huson) which seemed interesting to me. I do not ...
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1answer
62 views

Identification of zinc/aluminium/magnesium with copper sulphate solution

We are doing an experiment and would like to be able to identify zinc/aluminium/ magnesium . Would a copper sulphate solution work ? I hear that it turns black on contact with zinc, stays clear on ...
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31 views

Assessing fire hazard of compounds

Following up on a somewhat too broad question about amateur chemist safety, this will be the first to address some of the issues discussed there. I often use the NOAA MSDS database (material safety ...
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77 views

Hazardous materials handled by amateur chemists [closed]

I'm a enthusiastic and devoted amateur chemist (in disguise, I'm actually a mathematician), but lately I've been thinking to what extend it is safe to pursue my hobby. I'm after all an amateur with ...
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48 views

What is a good way for a laymen to purify alcohol to near 200 proof?

I'm making herbal and medicinal mushroom tinctures and extracts. Normally I'll use everclear but it isn't cheap and 95% alcohol. Also I don't know what that other 5% is. Is it just water? Is ...
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27 views

Why are multiple extractions better than a single extraction? [duplicate]

I'm extracting $\ce{N-(4-butoxyphenol)-N'-(4-dimethylaminophenyl)thiourea}$ from thiombutosine (anti-leprosy drug) tablets. I'm doing this extraction with hot ethanol. My question is why are 4 ...
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1answer
101 views

Vacuum-jacketed distilling column

I was looking for some distillation equipment on Sigma Aldrich because I wanted to perform some vacuum distillation, when I came across a vacuum-jacketed distilling column. Now as far as I understood ...
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86 views

The unit of energy, 1 dm³ atm, is equal to how many calories?

I surfed through the internet and visited a number of chemistry websites but only in vain. I couldn't find an answer. Please help! Your quick response will be appreciated.
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1answer
59 views

What is formed when hydrogen peroxide reacts with titanium?

I just got night contact lenses, and you are supposed to use a "one-step" cleaning solution to clean it over a period of six hours. At the bottom of the lenses case, there is a "titanium plate ...
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6answers
563 views

How can I demonstrate chemistry with the simplest possible experiment like with the “elephant's toothpaste”? [closed]

I actually have to perform an experiment for my school project, and since chemistry is a subject which has the ability to show some pretty good results, I'm not able to think about a project which ...
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1answer
75 views

What concentration of sulfur hexafluoride is safe to inhale

I am an 8th grade science teacher doing a unit on density, and I want to inhale helium and sulfur hexafluoride as a fun demonstration. I am open to using any source to purchase from, and money is not ...
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1answer
222 views

Why does the water in a Powerade bottle tastes a little like Powerade after many refills?

I have a bottle of Powerade and after probably around 20+ refills of water, the new water I put in still tastes/smells a little like Powerade. How does that happen?
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126 views

How do I clean a silk tie at the knot?

I would like to know how I can clean a silk tie at the knot. I presume it got filthy, over time, due to "fatty" fingers. I am looking for answers either based on 1) good theory or 2) personal ...
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1answer
120 views

Why does water volume decrease when salt is added?

help me to know the reason why does water volume decrease when salt is added? our teacher asks us in the class but I don't find any strong reason.please help me.
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2answers
78 views

How does glue work?

Simple question. How does household glue work? How does it attach to almost any other compound? Thanks.
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109 views

Is sodium chloride really odourless? If yes, what do I smell?

I just had to read some general descriptions of sodium chloride and it was always classified as odourless (e.g., by Wikipedia). However, large amounts of table salts (around 1 kg) have a clearly ...
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1answer
46 views

Why is it a good idea to put some salt in the bread dough?

The salt that you can typically find in a kitchen is the $\ce{NaCl}$, isn't this salt supposed to act as an antiseptic? I find a lot of recipes that suggest the addition of salt when preparing the ...
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1answer
55 views

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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2answers
132 views

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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1answer
313 views

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 ...