Is there any household ingredient, added to water to make ice that stays cold and in a frozen state longer?
Answer:
Nothing can keep it cold longer except possibly the physical addition of insulation... or magnetic polarization... Too expensive.
However... if you want to keep it solid longer... mix it with gelatin. Technically, this is not a solid (Ice) but with the molecules bonded this way It may help you achieve some of your goals... no need to flavor the gelatin. :-)
The best way to bond the water together, in the household... if this helps... is to use water lock... If you use distilled water you can bond up 300 times its weight in water... You can acquire water lock from baby diapers, remove the powder after you cut open the diaper. fun fun fun... this will give you sort of a flexible cold pack if you use it in a zip lock.
Lastly... If you want to make room temperature water cold without a freezer... find some heavy duty garden fertilizer... Ammonium Nitrate... pure... then dissolve it in water... the temperature will go down... this only works once...
Hope this helps...
Adding something to water will lower the melting/freezing point, meaning that ice will melt faster. This is why we put antifreeze in our car radiators. I don't know of anything that you can add to raise the melting point.
Sorry, I dont know of anything that can make ice stay frozen longer. However.
When other substances such as salt and sugar are mixed with water, it becomes more difficult for the water to freeze. This is because when water freezes, its molecules form a regular pattern, and dissolved substances interfere with
forming that pattern. So the more stuff there is dissolved in water, the colder it must become for the water to freeze.
Melting is the same process as freezing, just in the opposite direction. If it's harder for water to freeze when it has extra stuff dissolved in it, it is also easier for ice to melt when extra stuff can dissolve into it.
I do not know of anything that will make it remain COLD longer. If there was something you could add to the water that would insulate it. Maybe a gel like substance. Warm transfers to cold and you will have to find a way to stop it.
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