Applications of chemistry to reagents and reactions of everyday life.

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Why does opened wine develop the sour taste and smell of vinegar?

An opened bottle of wine developed into a sour taste and smell of vinegar. Why?
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183 views

When I place a straw in carbontated drink and blow, more gas bubbles rise to the surface?

When I place a straw in carbontated drink and blow (making bubbling noises), more gas bubbles rise to the surface. The gas bubbles which rise to the surface are from the carbon gas dissolved in the ...
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What volume of sulfur dioxide is produced at STP? [on hold]

5.00 L of $\ce{H2S}$ and 5.00 L of $\ce{O2}$ are allowed to react. Assume the reaction goes to the maximum extent possible. What volume of sulfur dioxide is produced at STP?
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44 views

Can organomercury compounds synthesize accidentally from household cleaning products? [duplicate]

I had broken a CFL partially on carpet last week. It was a spent bulb, and the outer glass shell broke but not the fluorescent tube - apparently the tube did have a small hole in it which found out ...
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1answer
33 views

Water in the ultrasonication bath

Why something jelly forms in the water if it is kept in in a ultrasonication bath for long periods? When water is exposed to ultrasonication for say a month, some jelly substances form in the ...
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1answer
31 views

Can acid mine drainage form acid rain?

Can acid mine drainage form acid rain? Since normal acid rain is formed via combustion of fossil fuels, the sulphur dioxide and nitrogen dioxide are all in the gas phase, whereas in acid mines the ...
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396 views

Can dimethylmercury originate from cleaning up a broken thermometer with disposable wet wipes?

I broke a CFL in my home (so elemental mercury is present in a small amount) and wiped up some of the mess with a clorox wipe. The wipe in question contains dimethyl benzyl ammonium chloride and ...
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1answer
22 views

What non-poisonous chemicals can get rid of SLS effectively?

Whenever I brush teeth, there are some kind of bubbles sticking inside the cavity and that's uncomfortable, it should be SLS as found on the internet. Does anyone know how do I get rid of those ...
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150 views

Peroxide bleaching for bast fibres?

Is peroxide bleaching ($\ce{H2O2}$) suitable for treating bast fibres? I read that to be successful, it needs to be combined with chlorine bleaching. Because of the end usage, I don't want to use this ...
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43 views

How to calculate the required concentration for sodium sulfite to remove oxygen as an oxygen scavenger from a solution?

If I know the amount of oxygen in such a solution, how can I know the required concentration of sodium sulfite to be used and react as oxygen scavenger?
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478 views

How can I easily explain to a layperson the difference between types of “contains”

I had a conversation with somebody who had somewhat confused ideas about food. He thought that "all food contains sugar" and when I gave a bottle of oil as the counterexample, he said the glycerol is ...
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39 views

Effecting Chemical Change

Apologies in advance as I am not a science person by any definition. By most, I'm probably not a person but we'll let that be. I am studying the notion of "change" in things and focusing on chemical ...
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1answer
19 views

Accelerated Oxidation Of Iron When Coating Breaks

I was presented with the following information: If iron is painted, then oxygen and water are prevented from contacting the metal, and corrosion is avoided. Sometimes the iron is coated with a thin ...
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Should residual filtered water be removed from a pitcher before new water is added?

Should the remaining filtered water in a filtered pitcher be removed before adding new water to the filtering water system in the pitcher?
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16 views

Why does the black powder that comes off aluminum pans behave the way it does?

When I wet an aluminum pot or cookie sheet and then dry it with a towel, it creates dark gray marks on the towel. This happens more if the aluminum is a little rough. It seems that there's a fine ...
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1answer
33 views

Mixing solvents, or how does paint thinner work?

I would like to understand how a mixture of solvents works together. For example, there are two solvents combined, and each one allone can dissolve some material, but one acts faster. How do they ...
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1answer
54 views

Is triclosan harmful?

I keep hearing about this product known as triclosan, and that it is used in sanitizing soap. And I also heard that it is harmful, and causes some sort of muscle problems. However some people aren't ...
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1answer
57 views

Finding pH of a buffer

What is the pH of a solution prepared by mixing 25.00 mL of 0.10 M methylamine, $\ce{CH3NH2}$, with 25.00 mL of 0.10 M methylammonium chloride, $\ce{CH3NH3Cl}$? Assume that the volume of the solutions ...
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mixing borax and shampoo

I use borax to clean everything. the other day I thought it would be a good idea to mix a little borax with my shampoo while showering. after lathering it on my scalp about 30 seconds it began to ...
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I'm flame test what part of the salt causes the color of the flame [duplicate]

In a flame test what causes the color of the flame I tried Google to find the answer but was not getting anything
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1answer
30 views

Ratio between heat tranfer coefficient and thermal conductivity

Consider the Robin boundary condition for the diffusion/heat equation $\mathrm{u_t=a(t)u_{xx}+f(x,t)}$: $$\mathrm{-k(t)u_x(0,t)=h(t)u(0,t)}$$ or $$\mathrm{u_x(0,t)+\frac{h(t)}{k(t)}u(0,t)=0}$$ ...
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37 views

Why does rock salt change colour when it's heated

We heated rock salt for a chemistry lab and it changed from white crystally rock to brown rock and ash-like materiak on the bottom of the test tube. Also there was a sizzling\popping noise. Why did it ...
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51 views

Whats the Balanced chemical equation for heating sodium chloride and what type of a reaction is it? [closed]

For my chemistry lab we had to heat sodium chloride and there was a colour change and a sizzling sound. Is it a decomposition or synthesis reaction, and what is the balanced chemical equation for it?
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What makes ceramic coated pans fail? Is it reversible?

If one reads reviews on ceramic glazed cookware (esp. frying pans) one pattern becomes apparent: the pan is awesome at first, nothing sticks to it, even with little to no oil. Then, after a few months ...
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20 views

Is there a visible change to baking soda when it reacts with odour?

For example, would a box of baking soda in a fridge lose weight as it absorbs odor? How long would it take to drop 100g?
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36 views

Do sugar alcohols have the potential to get a person drunk?

From what I understand is ingesting high amounts of sugar alcohols can lead to various effects such as abdominal pain and diarrhea, my question is, is there a certain amount of sugar alcohol if ...
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38 views

How to remove nitrate from water sample?

Are there any simple methods to completely remove nitrate ions from few ml of impure water sample ? One method I am curious about is the following process : Add one or more reagents to water in ...
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429 views

Can carbon monoxide contaminate water?

Just wondering if you fitted a cold water tank overflow pipe into a car park at the height of a car exhaust , if the carbon monoxide fumes went back up the oveflow pipe into the tank would this ...
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1answer
68 views

What reaction is happening when a lithium polymer battery “is on fire”

When something goes wrong with a lithium polymer battery (as are commonly used to power electric models and robots), and it "catches fire", what is actually happening? What gas or gasses are being ...
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1answer
27 views

Analysis project to conduct [closed]

We have been asked to conduct an analytic project for chemistry. It is important that the project conducted hold social implications and the conclusion achieved help inform people better. Several ...
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1answer
45 views

The acid in soft drinks dissolves your teeth. Which type of chemical could you use to stop the acid? [closed]

The acid in soft drinks dissolves your teeth. Which type of chemical could you use to stop the acid?
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44 views

Exercising to use up energy consumed

Suppose I eat a whole $450~ \rm{g}$ chocolate Easter rabbit. The enthalpy of combustion of chocolate is $−22.4~\rm{ kJ/g}$. One kilogram of body fat contains $39000 ~\rm{kJ}$ of energy. Walking for an ...
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1answer
29 views

Can weathering change the composition of something so that it appears different?

There's a murder trial ongoing in Ireland at the moment and one of the pieces of evidence is a spade found at the scene along with the skeletal remains. It was contended by the prosecution that this ...
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946 views

Where do the bubbles in a glass of water come from?

This weekend I accidentally left a glass of water on my kitchen table for a few days while I was out of town. Unsurprisingly, bubbles formed on the walls. As I understand from the last time I ...
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28 views

Definitive Guide To Removing Stains From Baby Clothes

I'd like someone to explain, scientifically, what makes some baby clothes' stains so hard to remove, and what the right way to treat the stains is, chemistry-wise. A lot of internet sites have ...
8
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1answer
81 views

What forces hold ink on paper?

On regular paper, ink is absorbed, while on photopaper ink stays at the surface and dries for a longer time. What forces act in these two different cases? (see also related questions about pencil ...
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1answer
43 views

Saltpetre in the Garage

My neighbour warned me that saltpetre (potassium (sodium) nitrate) is danger in the certain conditions. Is it possible that it can explode in my garage?
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33 views

Could I settile for galvanized steel over stainless for salt corrosion resistance?

Bear with me, I'll get to the chemistry soon. I have a float tank that I want to attach a skimmer to. Unfortunately, the enclosure is weakened by cutting a hole out of the ABS plastic. The weight ...
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1answer
65 views

Why is hydrogen gas so highly reactive? [closed]

Why is Hydrogen so reactive? What makes it combustible?
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58 views

How to work out what element will react more with oxygen?

I do not understand how you can work out which element will more readily react with another element. For an example, I have Lithium (Li) and Sodium (Na) and I am trying to work out which element ...
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1answer
50 views

Chalky residue from melted ice cubes

I bought a new refrigerator that makes ice cubes. The instructions said to discard the first 3 full bins of ice in order to ensure the new water line is flushed clean. I dumped the full bins in my ...
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61 views

Why would this reaction occur? Won't it be unfavourable? [duplicate]

I was just reading about how Nitrogen and Oxygen combine to form Nitric oxide. My question is, why would this reaction even occur? Isn't the valency of Nitrogen 3- and Oxygen 2-, and therefore this ...
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1answer
766 views

Why is ethyne and not ethene used for welding?

Ethyne (Acetylene) is used with $\ce{O2}$ for welding. My question is that why is ethene not used? What properties of ethyne make it suitable for welding?
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155 views

What is “mer”, the first ingredient in a type nail polish?

The first ingredient in a type of nail polish is "mer". What is this? Is it some kind of chemical? How is it used? How does it work?
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102 views

Why are water droplets shaped like that?

With nothing to do, I stared at the droplets that get condensed on the glass panel of my window. Upon examination, these droplets appear to be in some sorta pattern. There are big droplets as well as ...
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1answer
49 views

Could PNP (Silicon) transistor be toxic when exposed to air\light?

The story goes as follow: While I was in the electronic room I got bored and crushed a PNP transistor (Model CDIL 2N2907) using a rotating pipe jaws just like in the picture bellow. Now, it took me ...
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1answer
30 views

Separation of metal particles from fluid in ferrofluid

I purchased commercial Ferrofluid, and when suspended, the water and/or alcohol turns into a brown sludge. In 95% alcohol, all the metal particles separated from the "tar" Why, and how can I prevent ...
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1answer
71 views

What is the ratio of oxygen to magnesium oxide, by mass? [closed]

The mass ratio of magnesium to magnesium oxide is 0.455 g magnesium/0.755 g magnesium oxide. 1.What is the ratio of oxygen to magnesium oxide, by mass? 2.What is the mass ratio of oxygen to magnesium ...
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210 views

Where did all the elements come from? [duplicate]

I heard somewhere (I think is was a show called "How The Universe Works") that the big bang was the result of a hydrogen atom and a helium atom. Is this true? If so, where did all the other elements ...
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32 views

do candles burn wood varnish fumes?

A friend of mine bought a piece of furniture that had a super smelly wood varnish, so I read around online and someone said to light candles to burn the chemical fumes. Does anybody know if there is ...