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I've heard that saying something nice in front of water changes the water molecules shape into a nice shape and saying something bad in front of it makes the molecules align in a bad order (ugly one).

This is not about Does water have a memory as claimed in homeopathy? but about how molecules are arranged in water and their good/bad effect on humans.

If water listens to nice music would it become more productive?

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    Can you give an example of someone making this claim? Is it just the cooked rice legend again? – Oddthinking Mar 23 '14 at 22:39
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    Exposing water to music (or any loud noise) would make it more productive - it'd vibrate! ...However, I doubt this is what you meant, so for the purposes of your question, what do you mean by "productive"? – Clockwork-Muse Mar 24 '14 at 5:32
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    If water listens to nice music would it become more productive? -- Productive? How is water productive in the first place? Water is simply matter, it doesn't produce anything. – Flimzy Mar 26 '14 at 1:15
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    @Aeronth: I suppose if one chooses meaningless words, then a disagreement with that would indeed be "disagreeing on choice of words." That doesn't make the words any more meaningful. I'm clearly not the only one who has the same problem with the question. – Flimzy Mar 27 '14 at 23:13
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    Never let your water molecules talk to strangers. They are too small. – Quora Feans Mar 27 '15 at 17:50
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Words are just that – words. They have no power whatsoever and the laws of physics do not distinguish between "good" words and "bad" words.

You speak English, which happens to be one of many thousands of languages that have developed over the centuries. There is no general rule that allows you to categorise "good" words and "bad" words. In some languages the same words mean the complete opposite - e.g. čerstvý in Czech means "fresh", while czerstwy in Polish (pronounced the same) means "old", "stale" and "bad". There are many cases where words that sound exactly the same have a completely different meaning.

Similarly "nice music" is a relative term, the laws of physics cannot distinguish between music that someone finds nice and not nice.

Music and spoken words are sound waves that can make the water molecules vibrate. However this will not change the "shape" of the molecule, a molecule that is pretty simple (H2O). Moreover a molecule doesn't really have a "shape" per say, it is just a collection of particles that keep quite close to each other and follow a certain "structure". A quote from Wikipedia:

Molecules have fixed equilibrium geometries—bond lengths and angles— about which they continuously oscillate through vibrational and rotational motions. A pure substance is composed of molecules with the same average geometrical structure.

Only isomers of the same molecule have a different structure, and they become an isomer through a process called isomerization, however this cannot be practically caused by sound waves*, especially by those caused by voice or music.

Finally it is impossible for water to "align in the wrong order". A single molecule of water is two hydrogen atoms covalently bonded to a single oxygen atom. You cannot "reorder" those atoms. When an atom is covalently bonded with another one, it means that it is sharing an electron pair with another atom. Since a hydrogen atom has only one electron, it cannot be bonded with two atoms, only one - this is why reordering is impossible, you can't have H-H-O instead of H-O-H - the latter is the only possible "order". It is also impossible for a water molecule to become ugly. Here is a water molecule: Structure of water shown as a simplified diagram

Ignoring the fact that we've already established that it is impossible to change its structure, I can't really understand how a structure so simple can become "ugly".

This might be related to Masaru Emoto's claims that water can react to intentions, which can be seen by freezing water and looking at the frozen crystals - it was also based around the idea of talking to water, but focusing more on human consciousness and emotions rather than just the sound. He would even go as far as suggesting that exposing water to certain pictures would have an effect on it. However an experiment has proven these claims to not be true. Emoto also refused James Randi's US$1,000,000 challenge to reproduce his own experiment with frozen water. His claims are widely considered to be pseudo-science and to violate basic laws of physics. Moreover the experiment itself and methods used have been criticized and described as not being able to verify his own claims. Physician Harriet A. Hall wrote that "This watery fantasy is all very entertaining and imaginative, full of New Age feel-good platitudes, holistic oneness, consciousness raising, and warm fuzzies; but it's hard to see how anyone could mistake it for science."

* Some isomerization happens when molecules get heated up in a presence of a catalyst. It is therefore theoretically possible to use sound waves to heat up a substance, since sound is also energy. An average yell lasting a single second would warm a glass of water 0.00000095 degrees Celsius. It is therefore theoretically possible to heat up a substance using very long shouting (we're talking months of constant, non-stopping yelling) in order to produce an isomer of a molecule, however this does not apply to water molecules and is generally a crazy idea.

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    "nice music" can be objectivised - beat, frequency spectrum, loudness dynamics... – John Dvorak Mar 24 '14 at 19:16
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    @JanDvorak: Music can be categories and grouped, but it's "niceness" will still be opinion based. You can prove that a particular song can make you relax, or agitated, but "nice" is too much of a broad an opinion-based term to make me agree with you. Even not too long ago "nice" Beatles songs that we find "nice" and "light" today were considered mad and crazy 50 years ago. – MMM Mar 24 '14 at 19:27
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    @Aeronth: I strongly disagree, an artist can be "impactful" and "influential" but that doesn't make him or his work objectively "nice". – MMM Mar 26 '14 at 15:05
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    @Aeronth - Nothing. There is no such thing as objectively nice. I can't stand the Beatles, for instance, but I'll certainly admit that they were a huge success and many people liked (and still like) them, with a huge impact. But I wouldn't call their music "nice". – Bobson Oct 26 '14 at 18:00
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    @MrDosu: Simple psychological association and reaction. The meaning of the word affects you, not its sound. – MMM Mar 31 '15 at 15:04

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