The Naked Scientists

The Naked Scientists Forum

Author Topic: Ice is cloudy but it's also clear ?  (Read 4646 times)

Offline neilep

  • Withdrawnmist
  • Naked Science Forum GOD!
  • *******
  • Posts: 20602
  • Thanked: 8 times
    • View Profile
Ice is cloudy but it's also clear ?
« on: 14/09/2006 17:29:05 »
Dearest Experts on frozen H2O !

is there any way at home to make ice cubes that are clear ?

Why do my ice cubes go cloudy ?...what is the cloudy stuff ?.

..when it melts..the cloudy stuff is not there ?

I've seen perfectly clear ice cubes in restaurants...I want those too..me me me me me !!...me wants clear ice cubes !!..so..what do I do ?

ta

Men are the same as women, just inside out !


 

Offline moonfire

  • Neilep Level Member
  • ******
  • Posts: 4597
  • Can't stand the heat, step away from the fire!
    • View Profile
    • http://www.m2global.com/stormdiamonds
Re: Ice is cloudy but it's also clear ?
« Reply #1 on: 14/09/2006 18:59:11 »
Neil, maybe it is a filteration of the water or perhaps distilled? Good question though

"Lo" Loretta
 

Offline lightarrow

  • Neilep Level Member
  • ******
  • Posts: 4586
  • Thanked: 7 times
    • View Profile
Re: Ice is cloudy but it's also clear ?
« Reply #2 on: 14/09/2006 20:32:34 »
I don't know how they do in restaurants, but I'm sure the "clouds" are made of air bubbles previously dissolved in water that were trapped in the solidifying ice. You should boil the water and then put it immediately in the fridge to give less time to air for dissolving in the water before it solidify.
« Last Edit: 14/09/2006 20:42:03 by lightarrow »
 

Offline Gaia

  • Sr. Member
  • ****
  • Posts: 397
    • View Profile
Re: Ice is cloudy but it's also clear ?
« Reply #3 on: 15/09/2006 13:03:04 »
Air and minerals in water help with the flavour. Have you ever tasted sterile distilled water such as that used in pharmacies to make up medicines? Yuck, makes revolting tea, gags at the remembrance!!! [xx(]

Hey, relates back to my other post about memory and sensory stimulation :)

Gaia  xxx
 

Offline moonfire

  • Neilep Level Member
  • ******
  • Posts: 4597
  • Can't stand the heat, step away from the fire!
    • View Profile
    • http://www.m2global.com/stormdiamonds
Re: Ice is cloudy but it's also clear ?
« Reply #4 on: 15/09/2006 14:33:57 »
Okay, tell the story...Gaia!  LOL

"Lo" Loretta
 

Offline Karen W.

  • Moderator
  • Naked Science Forum GOD!
  • *****
  • Posts: 31653
  • Thanked: 5 times
  • "come fly with me"
    • View Profile
Re: Ice is cloudy but it's also clear ?
« Reply #5 on: 15/09/2006 16:31:29 »
Yes interesting...... What would happen if you put Plastic wrap over the ice, does this cut down on clouding?

Karen
« Last Edit: 15/09/2006 16:34:26 by Karen W. »
 

Offline Karen W.

  • Moderator
  • Naked Science Forum GOD!
  • *****
  • Posts: 31653
  • Thanked: 5 times
  • "come fly with me"
    • View Profile
Re: Ice is cloudy but it's also clear ?
« Reply #6 on: 15/09/2006 16:33:51 »
I kind of thought that the crysalization was what caused the clouding, Perhaps the speed at which it was frozen...Maybe if it is frozen quicker there would be less clouding.....

Karen
 

Offline eric l

  • Hero Member
  • *****
  • Posts: 514
    • View Profile
Re: Ice is cloudy but it's also clear ?
« Reply #7 on: 15/09/2006 17:10:28 »
Freezing too quickly creates lots of small crystals, which do not all have the same orientation.  This causes part of the cloudiness.
Entrapped gas (air but also carbon dioxide) is an other cause for cloudiness.  Boiling the water first helps (as stated by lightarrow).
If you make ice in your kitchen fridge, freezing starts from the outside, so air and carbon dioxide are concentrated in the middle, toward the point of oversaturation.
Icemakers in restaurants and elsewhere make ice AROUND a supercooled drum, and fresh water is dripped on this ice.  This way, the dissolved air (or) gas) can escape, and instead of creating new crystals, they let the crystals grow.
 

The Naked Scientists Forum

Re: Ice is cloudy but it's also clear ?
« Reply #7 on: 15/09/2006 17:10:28 »

 

SMF 2.0.10 | SMF © 2015, Simple Machines
SMFAds for Free Forums