Applications of chemistry to reagents and reactions of everyday life.
1
vote
0answers
24 views
PEG (polyethylene glycol) and ITO (indiumtinoxide)
The binding of proteins to an ITO surface can be prevented by coating it with PEG groups (polyethylene glycol). PEG-silane is used to create the coating.
can somebody help with:
*Why does PEG silane ...
0
votes
0answers
27 views
Why calcium chloride is used to melt ice over sodium chloride
I'm not quite sure I understand this. My question is:
Calcium chloride is a salt used widely to melt ice on sidewalks and roads. Explain why one mole of $\ce{CaCl2}$ would be more effective ...
1
vote
1answer
84 views
Chemical reasons for choosing Salt Water or Chlorinated pool?
I am currently researching as too which is better for maintaining the chemical balance in a swimming pool. I have obviously tried the standard Google search for ...
0
votes
1answer
42 views
How To Obtain A Reducing Sugar At Home?
I'm looking for a reducing sugar such as glucose or maltose (any reducing sugar will do) for some home chemistry experiments. Is there a readily available reducing sugar that I might source without ...
-2
votes
0answers
39 views
Help with this question? [closed]
This may not be a question for chemistry.se, so if not could you please tell me where it belongs?
I have an assignment about the movie Up. Here is the question:
Critique the brief floating scene. ...
0
votes
0answers
21 views
What is the best way to disolve and consume Cysteine HCL Monohydrate powder?
If I mix Cysteine powder in Juice (something acidic maybe), does it remain at Cysteine?
It seems that it can oxidize into Cystine and loose some of its qualities. Veg-caps deliver the powder ...
1
vote
0answers
35 views
Drying a distillate liquid
So I'm carrying out the distillation of some essential oil and I have to remove the water content in it. The usual method is using diethyl ether but I'm looking for a greener method.
What can I do ?
-1
votes
0answers
23 views
Calculating how many cubic feet of helium are in a balloon with diameter of 3 feet [closed]
I am trying to find how many cubic feet of helium are in a balloon of diameter 3 feet. How might I be able to do this? I would have to calculate the volume of the balloon using diameter right?
3
votes
2answers
162 views
Is it actually possible to dispose of a body with hydrofluoric acid?
In the TV show "Breaking Bad", Walter White frequently gets rid of people who get in his way by submerging them in a plastic container full of hydrofluoric acid. This, at least in the TV show, ...
1
vote
1answer
47 views
What is the maximum pressure that JB Weld can withstand?
JB Weld, a brand name of steel-reinforced epoxy, makes claims of being the "world's strongest bond".
What is the maximum pressure it can withstand, and what is it about the interaction between the ...
1
vote
2answers
68 views
Formal charges, how to work them out
I found a site with this formalae if you will,
Formal Charge = [# of valence electrons on atom] – [non-bonded electrons + number of bonds]
I don't think I am using it correctly in finding the ...
0
votes
0answers
19 views
Is this a good lab procedure? [duplicate]
I am writing a chemistry lab procedure for step 9 on this procedure (sorry, that may not make sense):
Fill a larger container or tub about half full with tap water
Fill a 2 L plastic soft drink ...
0
votes
1answer
48 views
Figuring out the volume of air trapped inside a bottle of water
I am doing a chemistry lab report on figuring out the volume of air trapped inside a bottle. Here is the procedure:
Fill a larger container or tub about half full with tap water
Fill a 2 L plastic ...
3
votes
1answer
37 views
Removing wine stains from a decanter
I have a decanter which I use fairly often to pour out wines. I typically rinse it with hot water after the last wine has come out, but I cannot prevent it from forming 'residual' wine stains over ...
3
votes
3answers
85 views
Chemically removing rust without leaving any unwanted residues
I have this iron pan that got rusty from not being properly dried. Scrubbing it I was able to get rid of most of the rust, but there's still some I just can't remove. I thought I could chemically ...
0
votes
0answers
25 views
What should I study for my ACS final? [closed]
My Chemistry I class in college is having the final be the ACS standard chemistry test I guess. I was wondering what I need to study for that test. Are there any online helps or practice tests?
2
votes
3answers
58 views
Balancing a chemical equation
I'm in chemistry and I still have a hard time comprehending how to balance a chemical equation.
What are the main steps and general things to know?
thank you.
3
votes
2answers
76 views
Why do chalcogens (Group VI) stink so badly?
For more fun with Dr. Derek Lowe, see this for a primer: Things I Won't Work With - Carbon Diselenide. The short of it is that we carbon-based life forms generally like oxygen. However, move just one ...
1
vote
1answer
27 views
What determines a substance's energy of activation with air?
Ice will melt when heat is applied; paper will catch fire. In trying to figure out why — what the difference is between things that melt and things that catch — I found "Burn, Char, Melt" by Roberto ...
-1
votes
1answer
38 views
What is the freezing point of sulfuric battery acid?
As we all know, the freezing point of absolute sulfuric acid is 10C. The average lead-acid battery (sulfuric) uses ~30% sulfuric acid, and has a freezing point much lower than 10C. What constituents ...
1
vote
1answer
67 views
Why are the oxide materials insulating?
Why are the oxides usually insulating? It would be nice to get an explanation with chemistry terms (e.g., electronegativity, electron affinity, etc...) and a different explanation involving the ...
1
vote
1answer
47 views
Are my calculations correct for this reaction?
So in the reaction $\ce{2AgNO3 + Cu -> 2Ag + Cu(NO3)2}$, which is balanced, I was given $0.1\text{ g}$ of $\ce{Cu}$ that reacted. Are my calculations correct that if $0.1\text{ g}$ of $\ce{Cu}$ ...
0
votes
2answers
38 views
Balancing a chemical equation, but with an incorrect mole ratio
I'm wondering if it's possible to balance a chemical equation with an incorrect mole ratio. I right now in the unbalanced equation $\ce{AgNO3 + Cu -> Ag + Cu(NO3)2}$, I have a 2:3 ratio of ...
1
vote
1answer
73 views
How to get the valencies of elements?
How to find the valencies of elements by using it's distribution of electrons?
Explain the method in simple words?
Do you have to study the valencies or is there is a simple way of remembering?
PS: ...
3
votes
2answers
53 views
Why do frying pans stick less with heat?
I know this is simple, compared to most questions asked here, but I notice this several times a week and I'm curious.
I notice if I break an egg and drop it into the frying pan, and the pan is still ...
5
votes
2answers
103 views
Spontaneous explosion of a bottle containing alcohol and milk
A friend of mine gave me a bottle of home-made liquor which is a concoction of pure alcohol and sweetened milk. I accepted his gift happily and then I put the bottle in my cocktail cabinet. After an ...
0
votes
0answers
32 views
Homemade preservative for natural aloe-vera gel?
I suppose this question can be extrapolated to food in general, but it is the case that I would like to know if there are any methods that would help me to keep the aloe gel fresh, i.e. avoiding it to ...
4
votes
1answer
90 views
Deodorizing using baking powder instead of baking soda
I am an engineer and I understand the difference between baking power and baking soda as baking powder is baking soda (alkali) with tartaric acid (acidic) and an inert starch (why? Is this a catalyst ...
3
votes
1answer
63 views
Stripeless cleaning of windows
Cross post: http://physics.stackexchange.com/q/56800/7433
Last week I was discussing with a friend how we thought the stripeless cleaning of windows is achieved when using a cleaner like Windex ...
1
vote
1answer
88 views
Detection of potassium ions
I've bought a white powder. The label on the package states that the powder contains sodium chloride, potassium chloride and potassium citrate. How can I make sure that the powder does indeed contain ...
0
votes
1answer
55 views
Why does permanent marker writing come off a white board when coated with white board marker?
Why is it that dry erase markers allow permanent markings to come off?
Demonstration: http://www.youtube.com/watch?v=GD-MJ-nF55M
0
votes
1answer
166 views
Chemical reaction calculator
Is there any kind of program that is able to calculate the end result of a specific chemical reaction? Say I wanted to know what happens when you mix $HClO$ + $NaOH$, is there anything that could give ...
3
votes
2answers
126 views
How can a substance be diluted to nothing?
If I start with a small amount of a substance, and I dilute that substance with billions of gallons of water, what is the scientific explanation for there being no (actually zero) remaining molecules ...
5
votes
1answer
105 views
Is there a point at which Ethanol (E10) fuel becomes harmful to gas tanks or engines if not used?
This is not the typical chemistry question on this website, but I think it's an important practical question.
When I got a gas string trimmer, the woman who worked at the gardening shop told me that ...
-4
votes
1answer
93 views
Is Lead Chloride soluble?
Silver Chloride is not soluble.
Is Lead Chloride soluble?
$Pb+2HCl$ --> $PbCl_2 + H_2$
5
votes
1answer
41 views
Covalently bonding amide to glass
I am unfortunately not very good at chemistry, so I am having trouble figuring out where to start on this project. I need to have some way of get some amide functional groups stuck on a substrate ...
4
votes
2answers
135 views
What is the difference between hand wash and body wash soap?
I do not like body wash always with strong favor. I like hand wash soap to wash my body. Are they difference at all?
Thanks for the comments, so that I add the following information
I am really sorry ...
3
votes
1answer
40 views
Are pesticides used on fruit easily washed off?
I was hoping there'd be someone who studies pesticides here.
Are they water soluble?
Do they get absorbed in to the fruit?
How well would you have to wash the fruit to fully remove the residue?
3
votes
2answers
45 views
How might one reduce the concentration of bubbles in their ice, from ice cube trays?
So I have been freezing ice a lot recently, and I will come out and say it, as it turns out it is, albeit unlikely, it is sometimes possible for ice to "explode." I was not so aware of this before, ...
4
votes
1answer
138 views
Does citric acid react with carbonated water?
I've noticed that when adding lemon juice to carbonated water, large 'soapy' bubbles appear on the surface. Since I'm adding another acid to a solution of carbonic acid, I would maybe expect a faster ...
1
vote
1answer
156 views
Dissolving Organic Tissues
Watching some movie/TV this question came to mind, purely theoretical of course, if one wanted to dissolve a human corpse, like getting rid of a body after killing someone, is it better to use an acid ...
5
votes
1answer
298 views
What makes Kleenex Cool Touch tissues cool to the touch, and is it safe?
I love Kleenex Cool Touch tissues. I'm just wondering what makes them actually feel cool. For some reason it makes me think of refrigerant but I'm sure that's not in them.
Is it the combination ...
4
votes
2answers
175 views
What makes Coke acidic?
What makes Coke and other soft drinks acidic? These drinks are carbonated, so a freshly-opened can should have a lot of dissolved carbonic acid, but the ingredients also lists phosphoric acid. Would ...
3
votes
1answer
75 views
Is the vinegar and baking soda experiment safe for children?
To be more specific, could the carbon dioxide fumes produced in the reaction be harmful to a small child? I don't have a strong background in chemistry, and I was prompted to ask this question when it ...
0
votes
1answer
32 views
What are the common names of this two types of plastic?
I need to do some plastic molding design. I want to know the names/types of plastic which are commonly/widely used in industries (please see the pictures below).
2
votes
1answer
436 views
Homemade Rocket Fuel and Engine
I want to put an action figure in orbit but I need to know how to make a secure yet not too expensive rocket fuel engine. The design of the engine must very primitive and not too complicated.
I've ...
0
votes
1answer
216 views
Salt in vinegar to clean pennies
Let's say you have a solution that is vinegar and it has salt ($\ce{NaCl}$) dissolved in it. Then you place old dull pennies in it. Then you look at it 5 minutes later and the pennies are clean and ...
0
votes
1answer
136 views
Hydrazine synthesis
I'm trying to make rocket fuel by hydrazine and hydrogen peroxide with home products my question is: Is there any way to synthesize hydrazine with bleach and ammonia, using $\ce{H2SO4}$ as a catalyst? ...
2
votes
2answers
57 views
Is it possible to prevent methane combining with oxygen?
The output from an anerobic kitchen waste digester is mostly CH4, and CO2.
If the methane is collected over water; algae/moss may use the CO2 to grow. Yet Oxygen is released ... which, together with ...
2
votes
3answers
155 views
What are physical properties and chemical properties?
As the question title says, I would like to know what the physical and chemical properties are. If possible, please include examples. Since it seems to be related, I would also like to know what ...
