What is Heavy Water how does it differ from ordinary tap water and what is its mol wt and Formula?

Question

What is heavy water how does it siffer from tap water, what is its mol wt what is its formula what is it used for?

Answer 1

Heavy water is water which contains a higher proportion than normal of the isotope deuterium, as deuterium oxide, D2O or 2H2O, or as deuterium protium oxide, HDO or 1H2HO.[1] Its physical and chemical properties are somewhat similar to those of water, H2O. Heavy water may contain as much as 100% D2O, and usually the term refers to water which is highly enriched in deuterium. The isotopic substitution with deuterium alters the bond energy of the hydrogen-oxygen bond in water, altering the physical, chemical, and especially biological properties of the pure or highly-enriched substance to a larger degree than is found in most isotope-substituted chemical compounds.

Heavy water should not be confused with hard water or with tritiated water.

Tap water (also known as "running water") has existed for as long as indoor plumbing, i.e., since the late 19th century. However, it only became commonly available in the mid-20th century

The provision of tap water requires a massive infrastructure of piping, pumps, and water purification works. The cost of tap water is a small fraction of that of bottled water, often as little as 0.01%

The molecular mass (abbreviated Mr) of a substance, formerly also called molecular weight and abbreviated as MW, is the mass of one molecule of that substance, relative to the unified atomic mass unit u (equal to 1/12 the mass of one atom of carbon-12). This is distinct from the relative molecular mass of a molecule, which is the ratio of the mass of that molecule to 1/12 of the mass of carbon 12 and is a dimensionless number. Relative molecular mass is abbreviated to Mr.

molar mass = average molecular mass * (6.022*10-23g/u)*(6.022*1023/mol)
or
molar mass in g/mol= average molecular mass in u

Answer 2

Hydrogen has a couple of different isotopes; The most common form of hydrogen is a single electron orbiting a single proton. A small percentage of hydrogen is a single electron orbiting a single proton *and* a single neutron joined in the nucleus. This is called Deuterium. An even smaller percentage of hydrogen has *two* neutrons and a proton in it's nucleus. This is called Tritium.

Now, all water - which has two hydrogen atoms bonded to a single oxygen atom - contains mostly (99.5%) of normal hydrogen, along with about 0.499% Deuterium, and the rest is tritium. Even the water coming out your tap has this ratio.

Heavy water is water that is *mostly* made up of the deuterium & tritium. Physically, it's heavier. It was used by the Nazis as heavy particle absorbers in their experiments during WWII, trying to create an atom bomb.

I don't know the mol weight (I can tell you it's never pure - you're always going to have some standard water mixed in).

Answer 3

Remember the basic idea of isotopes? That just means that sometimes there is an extra neutron in the nucleus, well that's the idea here. Instead of normal water with an oxygen connected to a couple of hydrogens with no neutrons, one or both of the hydrogens has an extron neutron, this particular isotope of hydrogen is called deuterium. The molecular weight would be 19 or 20, depending on whether just one or both hydrogens are in the special isotope form. Deuterium is typical shown as a D in molecular equations, so hard water would be shown as
D2O or DHO, once again depending on if both or just one of the hydrogen atoms are in isotope form.

The thing with hard water is that while it isn't instantly deadly in small doses, you don't want to have large quantities of it for extended periods of time. Sterility and death are considered bad things. But don't worry, like I said, a little is no big deal, and special processes must be used to seperate out the amount necessary to cause harm to humans. As for what it is used for, it's biggest use is in the nuclear industry, both weaponry and commercial energy..

Answer 4

Heavy water consists of water formed from a Heavy Isotope of Hydrogen called 'Deuterium' ('D').
Where normal hydrogen has a single Proton and no Neutrons in its nucleus, Heavy Hydrogen has 1 Proton and 1 Neutron making it 2 times the mass of a normal Hydrogen.
'D' has a Atomic Mass of 2 compared to the 1 of normal hydrogen.
Deuterium can be present in very small quantities in tap water.
You will find that many people say that the Atomic Fusion taking place in the Sun, causes 2 Hydrogen atoms to fuse into Helium.
This is utter rubbish as Helium has a Mol.mass of 4..i.e 2 Protons and 2 Neutrons. This CANNOT be formed from normal Hydrogen but, from Deuterium. 2 atoms of 'D' = He and 2 atoms of 'H' = H2.

Answer 5

Water where the molecules are made from oxygen and the heavy hydrogen isotope, deuterium.

The molecular weight is approximately 20 since each deuterium molecule has an atomic weight of 2 rather than an atomic weight of 1 for normal hydrogen.

The formula is either D2O or ²H2O.

Answer 6

Deuterium is a stable isotope of hydrogen, it is also called 'heavy hydrogen'. Therefore, heavy water contains a higher proportion than normal of D2O in water. Water normally has 0.016% mol % D2O however, heavy water can contain as much as 99% D2O. Heavy water is a combination of deuterium and oxygen. It's chemical formula is D2O. Semi-heavy water would be HDO. It's molecular weight is 20.04 g/mol. A deuterium atom has 1 proton and 1 neutron, where the common hydrogen atom has no neutrons.

Answer 7

I always used nursery water until my daughter was 6 months and then I switched to tap. I now have a 10 week old son and am using nursery water. I will only switch to tap at 6 months again. It was probably just gas, I cannot see how the water could have bothered your baby, unless it was well water or not very good city water.

Answer 8

http://en.wikipedia.org/wiki/heavy_water
The information will explain about heavy water

I haven't been able to find the formula wt and mol for tap water
but I have a website here too.
http://en.wikipedia.org/wiki/Tap_Water

Answer 9

heavy water like tap water but its oxygen atom is O18 but tap water its oxygen atom is O16
and we use heavy water in chemical inestigations and experiments

Answer 10

sorry peter, i didn't know the answer but i didnot get your question! can u explain properly, what you want to ask? but molecular formula of water is H2O!

please ask your question in detailed form to me!