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

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5
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2answers
236 views

Nomenclature for different types of ice

How many types of ice exist and what is their nomenclature? I know that the ice on Earth is $I_h$, but why so?
0
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0answers
20 views

Why does ice water taste tastier than normal water? [duplicate]

Why does cool water taste tastier than normal water? I don't understand if water has no taste, color & odor. Then why does cool water taste different compared to room temperature water?
14
votes
4answers
3k views

Hypothetical: What happens to water as pressure increases to infinity?

I've asked a similar question here but the answer given shows the behaviour of water under general conditions. I'd like to know what the behaviour of water is like as pressures increase towards ...
3
votes
1answer
24 views

Why concentrated sulfuric acid for dehydration and dilute for hydration?

So for dehydration of ethanol, we use concentrated sulfuric acid, like this: but for hydration of ethylene, we use dilute sulfuric acid, like this: so why is one concentrated, and one dilute? ...
0
votes
0answers
14 views

Find the final temperature and the amount of ice left in the system [closed]

 10 g of ice at -10°C is added to 10 g of water at 85°C. What is the final temperature and amount of ice left in the system? (System is kept inside an ideal insulator). a) 0°C, 0 g b) 0°C, 2 g c) ...
0
votes
0answers
28 views

Flakes rather than cubes [on hold]

In the supermarket, I walked to the seafood section. Then, I discover the ice surround is not in cubes, it's in flakes form, meaning thin piece of water. So,my question how do these water flakes ...
0
votes
1answer
31 views

Oxygen dissolve in water

I know that $CO_2$ and $O_2$ are slightly soluble in water ($H_2O$) In my understanding, when carbon dioxide dissolve in water, they will react to form carbonic acid just like the equation below. ...
7
votes
1answer
63 views

Is there a simple way to separate deuterium oxide from tap water?

I understand that tap water contains minute amounts of deuterium oxide (heavy water). Is there a simple way to separate, concentrate the $\ce{D2O}$?
1
vote
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?
2
votes
1answer
47 views

Does the amount of acid change when I add water to vinegar?

I have a question that asks me to describe why adding distilled water to my vinegar sample would not affect my calculated Molarity (determining amount of acid in the vinegar be titration with a base). ...
1
vote
1answer
24 views

Does a timed reaction “ready indicator” paper exist?

I'm trying to see if such a thing exists in paper form that upon activation, changes colour or "indicates" after a set configurable amount of time. In other words a litmus or ph paper that can act ...
2
votes
1answer
309 views

Does hydrogen bonding only occur between water molecules?

Does hydrogen bonding only occur between water molecules? Is the dipole-dipole intermolecular interaction know as hydrogen bonding because it is between water molecules, or is called that because of ...
2
votes
1answer
275 views

Determining weight-percent methanol in water from specific gravity and temperature

The company I'm working with uses a fuel mixture of methanol and water. We use a hydrometer to measure specific gravity, in order to test the composition of fuel received from our suppliers. To ...
2
votes
2answers
40 views

Electrolysis not running, maybe dependant on distance of electrodes?

So I created a DC power supply of 15 V (special transformator connected to the net) and I have a graphite anode and stainless steel cathode. When I put them in a beaker next to each other in water, ...
2
votes
1answer
31 views

Zeolite process

I'm a higher secondary school studet. See this following image, I can't understand how water can rises through the bed of permutit, my textbook says - Hard water introduced from the top of tank and ...
5
votes
1answer
81 views

Salt concentration and electrical permittivity of water

We know that the electric flux density $D$ can be related to electric field intensity $E$ as $D=\epsilon(\omega) E$ $\epsilon(\omega) = \epsilon_0 \epsilon_r(\omega) $ where $\epsilon_0$ is the ...
1
vote
1answer
34 views

Approach to model solvent in a lattice: e.g. H2O in NaCl

If a lattice contains a solvent, lets say NaCl and water of crystallisation, what is the condition for a solvent molecule to change it's location? From my current point of view I assume that such a ...
3
votes
1answer
48 views

Electrolysis of Beer

Electrolysis of water, means that the water is separated into hydrogen and oxygen. As beer also includes water, I initially thought electrolysis of beer would cause the water to separate, and the ...
0
votes
1answer
28 views

Determination of chlorine in swimming pool water

How do I get started? What kind of experiment do I need to carry out? What equipment would I need for this experiment? Any other help/advice is appreciated.
2
votes
2answers
45 views

water vapor vs air (in a balloon)

I poured some water in a balloon, inflated, and tied it up. Over a period of couple weeks, all water in the balloon is gone. But the balloon is still at about 2/3 of original inflated size. I ...
4
votes
3answers
2k views

Would equal masses of gold and copper result in the same volume change if added to water?

Would equal masses of gold and copper result in the same volume change if added to water? Density of gold: $19.3~\mathrm{g/mL}$ Density of copper: $8.96~\mathrm{g/mL}$ I was thinking the ...
1
vote
2answers
57 views

What happens when ice melts?

What happens when ice melts? I have this question, with two possible answers: regularly arranged molecules change into irregularly arranged molecules water molecules become less densely packed ...
1
vote
1answer
38 views

Fluoride Color Reaction

I am trying to find visual ways to demonstrate water contaminants. For example, chlorine reacts to N,N-diethyl-p-phenyldiamine (DPD), forming a magenta color. The chemical doesn't need to be accurate, ...
2
votes
1answer
60 views

Effect of water viscosity (increased due to NaCl concentration) on dissolution rate of CO2

We did an experiment involving different $\ce{NaCl}$ concentration(ranging, 1-4%) on 100 mL of water. Our aim of the experiment was to find the dissolution rate of $\ce{CO2}$in the brine solvent. We ...
3
votes
1answer
611 views

How much oxygen is in a cup of water?

I know that water is 2 parts hydrogen and 1 part oxygen. Hydrogen and oxygen are quite light gasses, they don't weigh very much compared to water. Water is very heavy and it made me wonder exactly how ...
1
vote
0answers
29 views

Does CO2 dissolution in different salt concentrations affects the amount of carbonic acid formed?

We have a school experiment, where I must report on the following question: Does salinity affect the solubility of $\ce{CO2}$ in saltwater? So we selected four different concentrations of salt ...
3
votes
0answers
17 views

What additives could make a masonry unit water-repellent but vapor-permeable?

I'm curious about some of the wondrous materials available today are able to repel liquid water but permit water vapor to pass through. I've heard that housewrap-type plastics accomplish this by being ...
3
votes
2answers
53 views

Using Hydrates as a skin moisturizer

I was just in my AP Chemistry class earlier today learning about hydrates and their properties. It occurred to me that a compound with so much water could aid in moisturizing the skin. Is this a valid ...
1
vote
0answers
16 views

How to produce hot water-soluble soap balls? What is their chemical background? What about medical capsules?

There are water-soluble balls for soap baths. Then there are medical capsules that disappear in mouth. Is it possible do this kind of capsules and water-soluble containers at home? If not, what do I ...
4
votes
1answer
370 views

What is the bond angle of H2O?

I have been trying to find out the bond angle of H2O, but every site I visit has a different answer. So far, I have found the following angles listed: Site 1: 104.4º Site 2: 107.5º OR 104.5º, ...
6
votes
2answers
437 views

How much does water expand when heated, and does salt affect that?

For this question, assume all things not mentioned are perfectly controlled, all at 14.7lbs of atmospheric pressure, and water is 100% pure of anything not mentioned, with no dissolved air. Given a ...
1
vote
1answer
66 views

Chlorination of Water

Does passing chlorine gas through water form hydrochloric acid or bleach? Also, will a mixture of hydrogen and chlorine gas from electrolysis of brine do the same?
3
votes
1answer
45 views

Reaction of distilled water with hard water

This question seems silly, but this just came in my mind while i was learning Hydrogen. Means will there be any reaction when $\ce{H2O}$will react with $\ce{D2O}$..
2
votes
0answers
25 views
2
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0answers
26 views

Analytically combining Dynamic Equilibria that have a two way affect?

Lets say I want to model a water system as the following set of equilibria: $\ce{H2O <=> OH- + H3O+}$ | $\ce{A=[OH^{-}][H3O+]}$ $\ce{CO2 + H2O <=> H2CO3}$ | ...
1
vote
1answer
44 views

How much water would one loose if one burns hydrogen and oxygen?

By using electrolysis one can separate hydrogen and oxygen, but when burning hydrogen and oxygen together steam is released, therefore creating water. My question is: how much of the original ...
1
vote
1answer
51 views

tap water and distilled water for electrolysis

my water electrolyzer which I've built using this pdf, produces less gas than I expected. In that file the author insists on using distilled water instead of tap water and I have used tap water. would ...
6
votes
2answers
462 views

How can I identify whether a substance is KOH or NaOH?

I've bought $\ce{NaOH}$ or $\ce{KOH}$ (I don't remember which one!) for my electrolyzer and I've tested it. Now I want to improve its performance and I was searching for a better electrolyte when I ...
0
votes
1answer
343 views

calculate the amount of energy in KJ necessary to convert 346 g of liquid water from 0 C to water vapor at 182 C

Calculate the amount of energy in $\mathrm{KJ}$ necessary to convert $346~\mathrm{g}$ of liquid water from $0~^\circ\mathrm{C}$ to water vapor at $182~^\circ\mathrm{C}$. The correct answer is ...
2
votes
2answers
73 views

Are non-ionic compounds generally as dehydrating as ionic compounds in drinking water?

In order to turn sea water into drinkable water, virtually all of the salt must be removed. By definition, salts are ionic compounds. I am assuming that there are other non-ionic compounds devolved ...
5
votes
1answer
117 views

What stable arrangements of hydrogen-bonded water exist in the range of 4-20 water molecules?

Water clusters made up of various numbers of water molecules have been described. Are all of these structures theoretical? What experimental evidence supports any of these structures? How does the ...
2
votes
1answer
29 views

High/low density water solution values

I would like to know what min and max values of densities are achievable with water solutions. There are some conditions: 1. Normal or close to normal temperature; 2. Non-radioactive ...
3
votes
2answers
77 views

How can the density of water be maximised?

What is the maximum possible density of water at room temperature? The density of the water in the dead sea at 37 Celsius is 1.24. Would it be possible to increase density as such using salts we add ...
3
votes
1answer
81 views

Ethanol and water hygroscopic equilibrium concentration

I am working with a company to help improve their reaction process where they use SDA 2B Alcohol (Karl Fischer titration has it at 99.66% EtOH, 0.3375% toluene). Specifically, I am attempting to ...
2
votes
1answer
67 views

Can electrolyzing ice cause an explosion?

I know electrolyzing water separates it into hydrogen and oxygen. However, I am curious, if ice is electrolyzed, could it explode? My thought process is that oxygen and hydrogen bubbles would build ...
2
votes
2answers
111 views

Can water be produced by mixing hydrogen gas and oxygen?

Could there be some kind of process, a kind of "retrograde electrolysis" where hydrogen gas (or in some other form) and oxygen gas (or in some there form) are mixed with required energy to combine to ...
2
votes
1answer
137 views

Is there a readily available liquid that's more dense than water and insoluble?

I am looking for any liquid that does not dissolve in water with higher density and does not react with water, one that is readily available.
6
votes
1answer
311 views

Soap and rain water, why does it not rinse off?

I am in Papua New Guinea at the moment, where rain water harvesting is the most common way of getting water. When washing hands, the soap feels hard to rinse off, and my skin feels "greasy". I read ...
1
vote
0answers
27 views

What is electrodialysis and is electrolysis prevented or suppressed?

Recently, I was introduced to a method of desalinization called electrodialysis in which a current was applied to salt water in such a way that the positive and negative were separated and drawn ...
1
vote
1answer
43 views

Which acids are created by the combination of a gas and water?

Which acids are created by the combination of a gas and water? I know that carbonic acid is created by combining carbon dioxide and water, but are there others? Is there a specific name for this ...