All Questions
44
questions
1
vote
2
answers
448
views
Does adding solutes to water alter its triple point? [closed]
Does adding solutes to water alter its triple point? If yes, how do we find the new temperature and pressure of this point?
- 153
1
vote
0
answers
537
views
What's the density of a frozen ethanol or ethanol solutions?
How can we know what's the density of ice (water), but there's no data on how much is the density of frozen ethanol? (as far as I know)
4
votes
1
answer
274
views
Why is Iron very rare in seawater compared to many other elements?
I don't know the associated technical words to research this question.
There was high presence of Iron in the oceans in anoxic precambrian times, and today copper is 5 times more abundant in the ...
- 573
9
votes
1
answer
4k
views
Why does Dead Sea water feel greasy?
The best explanation I found so far is this:
These salts (magnesium, potassium, sodium, etc.) are responsible for the "greasy" feel of the water.
But it doesn’t say which salts exactly are ...
- 201
3
votes
0
answers
1k
views
Calculating total volume mixing NaCl and water
I'm (as a non chemist) trying to calculate the the volume of a NaCl solution. The problem is that I know the volume of water prior to mixing in NaCl, but I want to know the volume of the solution ...
- 131
1
vote
1
answer
2k
views
How do hydrogen bonds break the ionic bonds of a crystal lattice? [duplicate]
In the case of water dissolving sodium chloride. I was under the impression that hydrogen bonds were much weaker than the ionic bonds in sodium chloride, so how do they overcome the ionic bond ...
- 51
1
vote
0
answers
365
views
Mutual solubility of water and hexane [closed]
The question says that
the value of mutual solubility of water and hexane is small. Consult bibliography to find it out.
I can't find it and I'm also concerned as to why the question doesn't ...
- 477
0
votes
1
answer
935
views
Extract ammonium sulfate from water
What is the best method to extract ammoniumsulfate from water?
The assignment is as follows:
Manure is being processed and the product left is a mixture between water and ammonium sulfate, ...
1
vote
1
answer
278
views
organic hard surf wax?
I made some organic surf wax with 4 parts beeswax and 1 part coconut oil. The wax turned out to be sticky but had no tack.
I'd like to make wax for warm water that forms a layer of hard bumps on the ...
- 111
4
votes
1
answer
273
views
Liquid that does not spoil for a mineral aquarium
I want to create a decoration - a mason jar "aquarium". I want to take a large mason jar, put some nice mineral specimens in it, fill the jar with liquid and seal it with lid.
I believe I can't use ...
- 41
4
votes
1
answer
6k
views
Explain volume contraction in mixtures of alcohol and water
Could someone explain why volume contraction occurs when you mix an alcohol such as ethanol with water in relation hydrogen bonding and the dipole-dipole forces?
- 49
-2
votes
1
answer
9k
views
I have 6% weight by vol of hydrogen peroxide. How much water should i add to make it 3% [closed]
i read that to bleach hair we should use 3 percent hydrogen peroxide. the bottle i got is 100ml and says 6% w/v h2o2.so how much percentage of peroxide does it contain. how should i dilute it
- 1
3
votes
1
answer
5k
views
Does NaCl reduce the surface tension of water?
Does NaCl reduce the surface tension of water? And why?
For example soap does it, and I was wondering if NaCl does the same.
- 33
1
vote
1
answer
1k
views
Supersaturated gas solution
Can you make a supersaturated gas solution?
As we know solubility decreases when we increase the temperature, So If I do that, will the gas molecules escape the solution or will they stay in the ...
- 329
2
votes
1
answer
8k
views
Does glycerin promote bacterial growth the same as water?
A sodium chloride + water solution draws the water out from bacteria through the process of osmosis.
Would a sodium chloride + glycerin solution have the same antibacterial effect?
If I understand ...
