For questions relating to water (H2O), specifically its structure, properties, and uses in chemistry.

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2answers
30 views

Would there be a solid residue left behind from a reaction between NaK and H2O?

I gather the reaction produces Sodium Oxide and Potassium Oxide as well as Hydrogen. Would there be traces of Sodium Oxide and Potassium Oxide left of a cloth that was positioned near the reaction? ...
3
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1answer
63 views

Acetone absorbing water from the air

Our company uses acetone and isopropanol in our manufacturing process to clean our product. Our operators get the chemicals from a large container and put it into small containers like this (http://...
0
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0answers
18 views

what is the fastest way to evaporate 150 ml of water using only heat from the sun and what is the rate of evaporation [on hold]

This isn't for a project or question or anything, I'm just curious. Basically the question is what is the fastest rate of evaporation that can be achieved using only solar heat on a constantly ...
0
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0answers
15 views

Is there anyway to “raise” the octanol water partition coefficient of any compounds?

I'm wondering if there's anything that acts like salt which raises the octanol water partition coefficient of molecules. It would be great if anyone could give any feasible options such as low cost ...
0
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2answers
20 views

Can I split water without constant refill of solution?

I've looked all over the place to find a way for me to separate water without needing to put in salt. What I've found is you can separate water into hydrogen and oxygen through electrolysis (which ...
3
votes
1answer
24 views

What is the meaning of 'anion water' in coordination chemistry?

In Mechanisms of Inorganic Reactions by Fred Basolo and Ralph G. Pearson, a passage discusses the history of coordination chemistry. Ammoniates had been assumed to be analogous to hydrates. They ...
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0answers
20 views

Iron triiodide in water

How does FeI3 react with water? I can not find any data about it's solubility in water, so, I suppose, it may formate some hydrated complex structure (e.g. Fe[FeI4(H2O)2]2), or disproportionate up to ...
3
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0answers
39 views

How may the water from rain be tested to determine it is natural, or from cloud seeding?

This article lists several mechanisms that may be used to control the weather and/or induce rainfall. Apparently many states, other than the one listed in the headline, have experimented with such ...
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3answers
163 views

Why exactly does molten NaCl explode, when it is poured into water?

Why does molten $\ce{NaCl}$ explode, when it is poured into water? $\ce{NaCl}$ has a high melting point, $1074\ \mathrm{K}$ ($801~\mathrm{^\circ C}$). $\ce{NaCl}$ has a molar mass of $58.44\ \mathrm{...
-1
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2answers
57 views

why can't salt water and fresh water mix.

why can't fresh water and salt water mix. What happens when they collide with each other? What are their differences?
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2answers
27 views

Does boiling water really treat it to make it safer than filtered/chlorinated water?

It doesn't seem like it would, but some folks I know are adamant about boiling their water before ingesting it and the online articles I've found on this seem very subjective.
2
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1answer
32 views

Are there any water-miscible or -soluble substances that pass visible light and absorb microwaves?

...other than water? Absorptive but not opaque. There seems to be very little data like this online. I don't think you need to know why I'm asking, so in the interest of brevity I'll just stop here.
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0answers
16 views

Covalent bond and ions? [duplicate]

Are atoms in a covalent bond ions? For example water, does oxygen become the 0 2- anion or is this not correct to say since a covalent bond refers to the sharing on electrons? Im assuming atoms are ...
0
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0answers
46 views

why the Ka of water has such a nice value?

The Ka of water is exactly $1 \times 10^{-14}$, not something like $1.234 \times 10^{-14}$ or $3.1416 \times 10^{-14}$ as the case with most compounds. Is it a wonder of mother nature, or just an ...
7
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2answers
133 views

Are these chemicals suitable for disinfecting my water tank?

This is the same question that I asked before, only for another product this time. I have more detailed information about this product, including a data sheet. There is an 8000 liter tank containing ...
0
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2answers
23 views

How to measure the water content of opaque liquids?

Water content of (semi) transparent liquids could be approximated via absorption spectra. What method(s) can be used to measure the water content of an opaque liquid such as milk for example?
3
votes
1answer
87 views

What will happen if I put this chemical into my water tank?

There is an 8000 liter water tank on top of my house which provides water for the house. Bacteria, fungi, algae, etc often start developing in the tank, giving unpleasant smells, etc. This chemical ...
0
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0answers
15 views

Is distilled/deionizing water corrosive? [duplicate]

I've been reading up on distilled and deionized water and I've come across conflicting information. If compared to regular tap water there are little to no minerals, why are they used to clean ...
6
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3answers
67 views

Have “molecular clusters” for azeotropes been identified?

A different question about azeotropes got me thinking about this point again. Azeotropes have a very specific composition so it seems that the azeotrope ought to have some sort of physical structure. ...
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0answers
4 views

What are the theoretical and actual (measured) minimum water potentials in plants?

I'm a plant physiology researcher, but water potentials are not really my thing, so I don't have a great grasp on the literature. I'm dealing with water potential data right now though, and it seems ...
-1
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3answers
73 views

Does water evaporated from sea water contains any salts in it?

I want to know whether water evaporated from sea water is liable for drinking or not?
1
vote
1answer
24 views

Manipulate melting point of frozen water [duplicate]

How to manipulate water in way that ice melting point isn't 0°C, but for example 4°C?
21
votes
2answers
820 views

Are the lone pairs in water equivalent?

It sounds like a dumb question based on the way we draw water, but supposedly water is $sp^3$ hybridized, so one of those lone pairs should be in an $sp^3$ orbital and the other should be in a pure p ...
30
votes
2answers
5k views

What is the pH of ice?

The pH of pure liquid water depends on temperature. It is about pH = 7.0 at room temperature, pH = 6.1 at 100 °C, and pH = 7.5 at 0 °C. What happens to the pH (or to the ion product) of pure water ...
32
votes
6answers
13k views

Is it safe to drink reboiled water?

There have been some claims saying that drinking reboiled water is dangerous because it produces arsenic, nitrates, etc. Is this true?
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0answers
30 views

What makes the double displacement reaction:CaZ + 2 NaCl = Na2Z + CaCl2 (Z is zeolite) possible?

$\ce{CaZ + 2 NaCl -> Na2Z + CaCl2}$, where Z stands for zeolite. This is the reaction which generally occurs under removal of hardness of water during a process called Permutit or Ions exchange ...
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0answers
28 views

Moderately soluable

In solubility rules, there is some exceptions. It says for example: All sulfate ($\ce{SO4^2-}$) compounds are soluble except those of $\ce{Ba^2+}$, $\ce{Sr^2+}$, $\ce{Ca^2+}$, $\ce{Pb^2+}$, $\ce{Hg2^...
3
votes
1answer
39 views

Does clay absorb water because of polarity?

From what I have recently learned about ceramics, clay is essentially sheets of silicon and oxygen, bonded by covalent bonds. Between them, water keeps clay from forming a full lattice of $\ce{SiO4^{2-...
0
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1answer
48 views

Does hydrogen bonding contribute in solubility of a substance

If a compound can't hydrogen bond with itself but can hydrogen bond with the water, why does it still remain immiscible? Take for example ethoxyethane. It can't hydrogen bond with itself but its ...
0
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1answer
75 views

What is a hydrogen bond?

I was doing a little research on the Chemistry of water, and it said that water molecules have a hydrogen bond between them. What is it, and what does it do to water?
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0answers
25 views

Washable Pen Ink in Water - Colour Change

So I have a fountain pen that uses "washable" black ink cartridges. I haven't used it in quite a while. Having left it for some time with no ink it all dried up and I've been trying to get it going ...
1
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0answers
122 views

Does a microwave oven act on the principle of giving vibrational or rotational energy to water molecules? [closed]

Does a microwave oven act on the principle of giving vibrational energy to water molecules or by giving rotational energy to water molecules? I tried to google it but answers are not specific where as ...
0
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0answers
17 views

reduce pollutants in cooking water

I am looking for a simple method to reduce Arsenic and other pollutants in cooking water, possibly not using filters. My aim is not to obtain perfect drinking water, but just to reduce the absorption ...
0
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1answer
124 views

Calculating temperature after adding heat to ice

If $53.2~\mathrm{kJ}$ of heat are added to $15.5~\mathrm{g}$ of ice at $-5^\circ\mathrm{C}$, what will be the resultant state of matter in which water is present and also calculate its final ...
0
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1answer
74 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.
3
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2answers
43 views

Why did a former emulsion of oil and water precipitate after heating and cooling when heat made it originally?

I added 100 g coconut oil, 100 g distilled water and 500 mg lecithin to an 1800 watt blender. The motor from the blender has has a passive heating action. I blended it at full for four minutes. The ...
3
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0answers
25 views

Why does chromium metal not react with a solution of Mg^2+ even though their standard cell potentials produce a net positive voltages?

Write net equations for the spontaneous redox reactions that occur during the following or NONE if there is no extensive reaction. Use the lowest possible coefficients. Include states-of-matter under ...
0
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0answers
25 views

Acetic acid synthesis

I made some acetic acid by bubbling ethenone through water, but my weight calculations don't make any sense, so I think there were some side products along with the acetic acid. What are they, and ...
8
votes
1answer
165 views

Can H4O 2+ form?

Like $\ce{NH4+}$ ,Is there any possibility of formation of $\ce{H4O^{2+}}$ (of tetrahedral structure)? My theory is: it can be formed by osmosis setup where heavy acids like $\ce{H3PO4}$ or $\ce{...
0
votes
1answer
54 views

Is water committed to vapor state at boiling point or after? [duplicate]

Quite early into my studies, I learnt about phase changes with this graph. I’m just going to focus on vaporization/condensation. I learnt that the plateau was caused because all the heat was going ...
1
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1answer
44 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 ...
3
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1answer
53 views

Is HCl(l) acidic?

If in a reaction mixture HCl is given in liquid phase, will it behave as an acid ? I know that an aqueous solution of HCl is acidic but am confused about the liquid phase.
0
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2answers
48 views

Molar concentration of water and pKa value

By defintion, $\mathrm pK_\mathrm a$ value is defined as $$\mathrm pK_\mathrm a = -\lg ([\ce{H2O}] K_\mathrm{eq})$$ Consider the reaction: $$\ce{HCl + H2O <=> H3O+ + Cl-}$$ The Eq constant of $...
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0answers
53 views

Interactions between water and oil

I haven't thought about the forces that attracts oil to water (it is weak). The attractions between water molecules are caused by hydrogen bonds (primly), while oil through London forces. But between ...
3
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0answers
56 views

Separate toluene from acetone and isopropyl alcohol

I found a Cellulose Thinner, that is made of toluene 60-80%, acetone 10-20%, and 2-propanol 5-10%. As acetone and 2-propanol are water soluble, but toluene isn't, would it be possible to just add a ...
0
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2answers
49 views

Autoprotolysis Constant of Water

My chemistry textbook states that $[\ce{H3O+}][\ce{OH-}] = K_w$ in all aqueous solutions, which we know of as $K_w$. However, I was wondering why this was true. The textbook states that it is true ...
2
votes
1answer
164 views

Is organic carbon the same thing as organic compounds?

Are they the same thing or is there some minute difference? I have looked all over the web and you would think this would be a common question but I can't find any answer. If they are different then ...
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0answers
23 views

Why can cloud's bottoms be flat?

I've always wondered why clouds can have flat bottoms, and have debated to myself whether it was a difference in atmospheric pressures, or some water molecule tendency? Could someone shed light?
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vote
1answer
139 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 ...