Why does boiled water freeze clear




















Asked 5 years, 3 months ago. Active 4 years, 11 months ago. Viewed 33k times. Improve this question. Community Bot 1. The clear ice cube is closer to fully crystalline without voids that give internal surfaces to scatter the light. I'll update the question with some results of the experiment. Shaking soda will release gas, but that's because it starts off way out of equilibrium, and the shaking facilitates the reaction. Show 13 more comments. Active Oldest Votes. Improve this answer. Selene Routley Selene Routley Quoted from: ncbi.

You seem to consistently misspell it. It's been out of use for longer in the US than in the UK, so if you're American you may not have encountered it before. I am sorry if it seems an affectation. I am rather older than you and I can assure you it was in general usage in the mid 20th century, which is where I acquired language.

Moreover, I spell some words in certain ways quite deliberately even if a little unusual as it helps me recall them: I had terrible trouble as a child with homophones and their confusion: sentences with, for example, "there" and "their" in them seemed to disintegrate before my eyes before I could comprehend them. Finally, do not forget that English is a greatly bigger thing than merely the dialects of the US whose sensible spellings I generally prefer and soon to be DK, or Decay "Disunited Kingdom".

Show 7 more comments. The effects of heating the water: removing dissolved gases: higher temperature favors endothermic reactions Le Chatelier's principle. The effect of boiling: Solubility of gas in liquid not only depends on temperature, it is directly proportional to the partial pressure of the gas. When boiling, the gas phase in contact with the water is no longer the air, but the water vapor in the bubbles and close to the surface.

In those bubbles the partial pressure of the gases will be close to zero, so gas molecules will still leave the liquid phase and the increased surface area and the movement of the water speeds up the process , but hardly any will return. Given sufficient time, the water vapor will remove most of the gas. Boiling is basically the equivalent of degassing by purging: removing a gas oxygen usually from a solvent by bubbling an inert gas through it. During freezing, the ice layer starts at all sides of the cube and grows inward.

In addition, clear ice often forms well beyond the ice-protected areas of the aircraft. Distilled water will give you slightly more clear ice, but any clean water should work. Put it in the freezer, leaving the lid off or removed. Then flip it over and let the ice slide out. Air and impurities make it melt away more quickly. First of all, you can make ice cubes from water produced by reverse osmosis systems. As the water crystallizes and freezes, dissolved gases and minerals are also pushed out and down into the water.

The ice above is therefore clear. What happens when you freeze boiled water? The leading explanation for this strange phenomenon is fairly straightforward. Hot water evaporates more than cold water. As boiling water cools down, a small amount of its mass is turning to steam and floating away. Hot water freezes faster than colder water simply because less of it has to turn into ice. New LG Instaview fridges now make clear ice spheres. According to LG, these new iceboxes can automatically make three, 2-inch diameter ice spheres in 24 hours.

Whether you use distilled or tap water, clear ice tastes better. Clear ice simply looks better than cloudy ice. Finally, clear ice thaws more slowly and evenly. Cloudy ice cubes that contain pockets of air melt more quickly, leaving beverages diluted and watered down much faster than those made with clear ice cubes.

Distilled water will give you slightly more clear ice, but any clean water should work. Put it in the freezer, leaving the lid off or removed. Remove the cooler, and let it sit long enough that the ice melts a little, about 5 to 30 minutes. These components end up concentrated into the last part of ice to freeze. This concentration generates smaller crystallization which in turn reflects more light rather than letting it pass through.

This presents as white, milky, or cloudy ice. When looking at a standard kitchen ice cube, it is common to see a cloudy white center or white at the bottom of the ice cube. This is that concentration of water impurities and the light it reflects. To create clear ice, you need to remove the components that lead to cloudy ice. In theory, boiled water sounds like a potential solution for this. As the temperature of water increases, soluble oxygen decreases. Deoxygenating the water could help eliminate air from the water leading to less crystallization and less of a cloudy, white appearance.

We're using distilled water water made from boiled water vapor and boiled water to test this theory. Using a standard 2.



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