Applications of chemistry to reagents and reactions of everyday life.

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Do chemicals have an expiry date?

A bonus question would be, if so, why? Is it because it decomposes and hence the expiry date is calculated out?
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23 views

Any home made tricks to fill up a baloon that floats?

These days there are a number of fancy balloons available, some of them are very beautiful. As always, they loose their gas overtime and don't rise anymore. Some of those new type balloons appear to ...
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3answers
42 views

How to make permanent ink that appears after some time?

I'd like to ask, how to make permanent ink, that will be invisible when used, but after like 30 minutes it will appear (preferably dark color)? Thanks.
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0answers
8 views

Is hydrated calcium silicate a good anticaking agent?

I work in a salt production factory and I want to make a purchase for hydrated calcium silicate as an anticaking agent for salt. Is it a good anticaking agent for salt and what is the perfect ...
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1answer
23 views

Is it relevant to pursue a master degree or a doctorate when applying to a job in the petroleum field? [on hold]

I have a few more questions of this type for an interview. ( University work ) Thanks in advance.
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1answer
39 views

Is purple paint more suspeciple to UV damage than other colors?

I was recently sorting some Mardi Gras beads. These are cheap plastic beads on strings, coated in cheap metallic paint. While sorting the beads into different colors, I noticed that the purple beads ...
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12 views

Thermal stability of barium peroxide and barium oxide

why is barium peroxide more thermally unstable than barium monoxide Do I answer it based on the bonding and structure?
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68 views

How ‘lively’ would this ‘health’ potion be?

I’ve stumbled across a rather peculiar recipe for a allegedly ‘health’ potion in a computer game, composed of an unspecified amount of each of the following: rust (iron oxide) saltpetre (potassium ...
5
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1answer
25 views

Cyanide from seeds breaking down in a pond

I have a large loquat tree that overhangs a pond. The loquat seeds apparently contain cyanide of some sort, so I'm trying to find the effect the seeds have when they fall in the pond. Over time I ...
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15 views

Is the solution saturated or unsaturated? [closed]

A $\mathrm{10.0g}$ of solid solute is placed in $\mathrm{100g}$ of water at $\mathrm{20 ^\circ C}$ and all of it dissolves. then another $\mathrm{4.0g}$ of the solute is added at $\mathrm{20 ^\circ ...
2
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1answer
48 views

Soap versus Shampoo

Soap and shampoo are both cleaning agents in our daily life. Why is soap in solid form and shampoo is in a liquid form, though? Is it because of the chemical components inside them or another ...
2
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1answer
28 views

Can you eliminate cigarette smoke odor between walls?

If holes are made in dry walls is there a substance that can be sprayed in the walls to eliminate cigarette odor?
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73 views

Difference between white sugar, brown sugar and red sugar

I always get confusing why the appearance of normal sugar(the white one), brown sugar and red sugar are different although they are sugar. Is it because they each have different molecular formulae or ...
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1answer
55 views

What would be the reaction:if I put melting iron in normal water?

I know it's a very ordinary question.But I have to know it correctly. What would be the reaction:if I put melting iron in normal water?Will water be chemically changed?
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2answers
41 views

Difference between baking soda and baking powder

I learnt that the chemical symbol for baking soda and baking powder is NaHCO3. However, when I do a simple experiment which is put vinegar into both substances. I can get different observations. ...
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3answers
1k views

Does water have a smell?

I was washing my cup with hot water (without soap) and upon it nearing my nose, there was some sort of 'smell' (I lack a better word)- However the 'smell' differed when I was drinking just plain ...
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0answers
24 views

Grapefruit and sugar gelatin like substance

More or less I am trying to figure out how this reaction occurred, so I can reproduce it. On a plate I had an excess amount of sugar with a fair amount of grapefruit juice which was stuck to the ...
3
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2answers
68 views

Does it matter if all rust is removed before it is painted over?

In the context of automobile repair work, assume a metal surface has rust over it. Does it matter if all of the rust is removed before the metal surface is painted? If it does matter, then why? It ...
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0answers
15 views

Skin Adhesive Emulsion

I'm working on upgrading my current skin adhesive emulsion. It is a roll-on skin adhesive used to keep clothing attached to the skin. Ingredients are; Alcohol Denae,Ethyl Ester of PM/MA ...
1
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1answer
50 views

Chemistry and mathematical modelling

I'm searching for a chemical daily life experience that can be modeled by superior mathematics so that the origin of the equations involved can be easily explained to a beginner in chemistry. By ...
4
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1answer
54 views

Real life chemistry :boiling carrot dices

This morning I was boiling carrot dices. And saw something quite interesting happening to the dices. The water is not boiling. But before it boils, the dices started gathering at the center of the ...
0
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1answer
26 views

Rgarding common preservatives and their effect?

If someone has an average of 1 litre of Coke or Pepsi a day would this form too much Benzene oxide in the person's body or stomach and eventually effect part of their genetics?
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1answer
57 views

Alkaline Battery Chemistry

I'd like to understand the chemical reaction in a typical Alkaline battery a little better and how that produces a flow of electrons. I read wiki, how stuff works, and some more advanced articles. ...
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1answer
827 views

Does bleach turn a substance white or colorless?

From what I understand, bleach works to weaken the ability of a substance to absorb light. Thus this seems to be "whitening" i.e. reflecting all light. In contrast, colorlessness (according to ...
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1answer
52 views

Why is NaCl insoluble in CCl4?

Now I know it's something related to the fact that $\ce{CCl4}$ does not have a net dipole moment but I can't connect the dots.
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1answer
42 views

Finding compounds with B, Si, Ca, and Mg in differing amounts

Not sure if my question is better suited to a software related group, but here goes: Is there a software program that lets you add differing amounts of elements, minerals, etc., then tells you what ...
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1answer
34 views

Will lye damage vinyl pool liners?

I have a nutty neighbor that said someone told them to put liquid lye into their above ground pool. I said it would eat away the lining, their answer was to only use a little bit.
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2answers
98 views

Precautions and tips for Qualitative Inorganic Analysis of Coins

I'm a highschool student and as part of an investigatory project, I have decided to analyse which metals are present in our everyday coins. I chose this because in my previous academic year, I had ...
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1answer
41 views

Element letters

Does it change the compound if the element letters are switched? ex. HO or OH. Are those two different compounds or are they one in the same? This may be a simple question or I may have incorrectly ...
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1k views

Beer freezing after being opened

I am watching the Stoke vs Swansea, and to be honest, it's pretty boring. So much so, that I've started to wonder why it is that my beer has turned into a slushy after being taken out of the freezer. ...
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1answer
47 views

Applying the Solubility Guidelines is AgClO4 soluble or insoluble?

The book I am using is "General Chemistry: Principles and Modern Applications by Ralph H. Petrucci. On page 158 the Solubility Guidelines for Common Ionic Solids is given. Rule 3 states that, "Salts ...
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2answers
51 views

Which Solution has the highest total molarity of ions and why?

(a) 0.008 M $\ce{Ba(OH)2}$ (b) 0.010 M $\ce{KI}$ The answer is "a" but I do not understand why. The book says that "a" is a strong electrolyte with a total ion concentration of 0.024. How did they ...
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1answer
51 views

(NH4)2 SO4 (aq) + ZnCl2 (aq) ---> Using Solubility Guidelines to Predict Precipitation Reactions

The question ask whether a reaction will occur in the following case. If so, write a net ionic equation for the reaction. $\ce{(NH4)2SO4 (aq) + ZnCl2 (aq) ->}$ The book says that all possible ...
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2answers
56 views

Moles of a concentration?

I am having a problem wrapping my mind around the idea that in 230 ml of 0.615 M $\ce{KCl}$ there is 0.141 moles of $\ce{Cl^-}$. I guess I still do not understand moles. Is this calculation saying ...
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38 views

What form of zinc's found naturally in vegetables & meat?

What kind of zinc naturally occurs in plants? Zinc oxide, zinc sulphide, or something else?
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43 views

Chemicals to clean natural stones

I picked up some stones from a hiking trip. What can I use to thoroughly clean the mud and other hard deposits on the surface of the stones? I have only washed them with plain water.
3
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1answer
62 views

What chemical will dissolve the plastic coating on circuit boards

I'm trying to reclaim the metals on circuit boards and the vast majority is underneath the plastic coating. It is a brittle plastic that chips off in small flakes when etched but that process will ...
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0answers
48 views

Is it dangerous to live near lead? [duplicate]

Several month ago, I soundproofed the door of my room with two sheets of lead. Can it be dangerous to live with them for many years? Can lead "decay" in some way and be inhaled? (and what happen when ...
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1answer
95 views

Can the product be called “vinegar”?

For a product to be called "vinegar", it must contain at least $5.0$% acetic acid by mass. A 10.0 g sample of a "raspberry vinegar" is titrated with $0.125 \mathrm{M}$ barium hydroxide and required ...
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2answers
83 views

Standard list of odors?

Is there such a thing as a list of "standard" odors? In everyday context, there are various descriptions to odors such as "fruity" and "plastic-like". But are there more accurate and normalized ...
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75 views

Stoichiometry & Solutions Problem

Hello I am taking college level Chemistry in high school. My teacher isn't very good at helping me solve this problem, so I found this amazing website. I just have one question. I keep getting the ...
2
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2answers
107 views

How to dissolve candle wax (parafin)?

Wikipedia states, that waxes can be dissolved by non-polar organic solvents. But I failed to disolve candle wax in both acetone and ethanol, which are the only organic solvents I have at home. I have ...
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0answers
24 views

Relation between vapor pressure and density

Why does organic compound having high vapor pressure have less density than even water? Prologue: I had a drum (non-pressurized) of 200L of Vinly Ester for Glass fibre piping and I assumed that the ...
0
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1answer
34 views

Heat Absorption of Liquids

Does same amount of heat absorbed cause the same changes of temperature in the same amount of different liquids? Explain.
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1answer
75 views

Prevent molten glass from cracking when cooling down

My mother works in a ceramics workshop. Besides giving lessons she creates various ceramic dishes, cups and plates. She often uses the effect of colored glass melting in the product and then leaving ...
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1answer
85 views

Complete the following reactions and write the spectators for each if any

A.) cobalt (ii) chloride (aq) and cesium phosphate (aq) I am not quite sure if I have the correct answer to this equation, but I have $\ce{ CoCl2(aq) + Cs(PO4)(aq)}$ (for the equation setup) and for ...
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1answer
40 views

Simple and cheap anti-graffiti layer based non-paint solvent

I have this issue with a group of people intentionally damaging a bench. So far, they would paint curses over the bench with permanent marker. However after I removed the curses with ethanol, they ...
3
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1answer
52 views

Regarding preservatives in food

Can sugars like fructose-glucose or high-fructose corn syrup that are found in many types of processed food contribute to shortening a products shelf life? Don't bacteria love things like sugar so if ...
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1answer
55 views

What is the Natural abundance of Potassium

The three naturally occurring isotopes of potassium are $\ce{^39K}$, 38.963707 u; $\ce{^40K}$, 39.963999 u; and $\ce{^41K}$. The percent natural abundances of $\ce{^39K}$ and $\ce{^41K}$ are 93.2581% ...
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2answers
114 views

How many grams of NaHCO3(s) will be consumed?

Excess $\ce{NaHCO3_{(s)}}$ is added to 510 mL of $\ce{Cu(NO3)2_{(aq)}}$ 0.240M for the reaction $\ce{Cu(NO3)2_{(aq)} + 2NaHCO3_{(s)} -> CuCO3_{(s)} + 2NaNO3_{(aq)} + H2O_{(l)} + CO2_{(g)}}$