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The salt is not actually making the ice colder. The internal portions of the ice are already below 0 degrees Celsius. The salt, or NaCl, gets in the way of the intermolecular forces of the water, allowing the ice to melt at lower temperatures and remain in the water phase below 0. In other words, the water molecules are normally rigid enough to freeze at 0 degrees, but the addition of salt makes it more difficult for them to be rigid enough. This lowers the melting point. As the internal portions of the ice are already below 0, when the external ice is melted below 0 also, the internal, very cold portions, can further cool the water/ice mixture. The above answer is easily disproven. The assertion is that the ice core is colder than the surface, and the warmer surface is just being stripped away by the salt, revealing the cooler inner core.To disprove that, do the following experiment: Measure the temperature of your freezer. If your ice has been in there any length of time, the core and surface of the ice will be at the same temperature that you have measured (e.g. 25 F). Take a pile of ice from your freezer, dump a pile of salt on it, stir (for a while), and measure the temperature with a thermometer. It will get WAY colder than your freezer, thus proving the original answer to be impossible.
REAL ANSWER:
Once salt comes into contact with water, NaCl would split into Na(+) and Cl(-). Since these atoms have charges, they "tug" at individual water molecules. This makes the water less rigid and separate from each other. Since they are less rigid, the water molecules are free to move around. This movement is kinetic energy, which is measured by temperature. Due to the law of conservation of energy, the kinetic energy of the water can't just appear, it has to come from it's surroundings. So the air and objects near the ice/salt solution would transfer their heat to the ice/salt.
More powerful salt, like CaCl2 works better than regular salt because when it touches water, it splits into three atoms: Ca(+2), Cl(-), and Cl(-). The extra atoms mean more force when they "tug" at water molecules.
What else can I help you with?
Why ice don't melt in table salt?
It is because when you put in table salt, actually any salt, the ice absorbs the salt's energy and that is what make the ice colder than it was.
Is salt water colder then ice?
well for something to freeze it has to be 0 degrees or lower which is what ice is, frozen water. so the water has to be 1 degree or more to NOT freeze so the ice is colder than salt watercoz salt water is not frozen... does t6hat make sense? Actually, salt water CAN be colder than ice because the salt lowers the freezing point of the water.
Why do you use rock salt in ice-cream?
You don't use rock salt in ice cream, unless you want salty ice cream. You use rock salt (though table salt or sea salt would work just about as well) in the freezer to get it colder than you could with a mixture of ice and water.
When you make ice cream do you add salt to the ice or to the ice ingredients?
You add it to the ice used for cooling the mixture. It makes it colder. You don't want salt in what you eat!
Can you use salt instead of rock salt to make homemade ice cream?
Yes, you can use regular table salt instead of rock salt to make homemade ice cream. The purpose of salt is to lower the freezing point of ice, helping to freeze the ice cream mixture. Rock salt is commonly used because its larger crystals help to distribute the cold more evenly. However, table salt can also work, but you may need to use more of it.
Why does rock salt make ice colder?
Rock salt makes ice colder by lowering the freezing point of water. When rock salt is added to ice, it disrupts the balance between the solid and liquid states of water, causing the ice to melt. This process requires energy, which is taken from the surrounding environment, resulting in a decrease in temperature and making the ice colder.
What does adding salt do to making homemade ice cream?
Add salt to the ice to make it colder.
Why is salt added to ice?
To make it colder, faster.
Why do the ice cream vendors add plenty of rock salt in the surrounding ice cube at the ice cream container?
Because the salt makes it colder
How can salt be used to make ice colder?
Salt can be used to make ice colder by lowering the freezing point of water. When salt is added to ice, it disrupts the balance between the solid and liquid states of water, causing the ice to melt. This melting process requires energy, which is absorbed from the surroundings, making the remaining ice colder.
How does the addition of salt make ice colder?
When salt is added to ice, it lowers the freezing point of the ice. This causes the ice to melt, but in order to melt, it needs to absorb heat from its surroundings, which makes the ice colder.
How does adding salt to ice lower its temperature and make it colder?
When salt is added to ice, it disrupts the ice's ability to bond together, causing the ice to melt. This melting process requires energy, which is taken from the surrounding environment, making the ice colder. This is why adding salt to ice lowers its temperature and makes it colder.
How does adding salt to ice make it colder?
When salt is added to ice, it lowers the freezing point of the ice, causing it to melt. This melting process requires energy, which is taken from the surroundings, making the ice colder.
Why does adding salt to ice make it colder?
Adding salt to ice lowers the freezing point of water, causing the ice to melt. This process requires energy, which is absorbed from the surroundings, making the ice colder.
What is the effect of adding salt to ice and how does it make the ice colder?
Adding salt to ice lowers the freezing point of the ice, causing it to melt. This melting process requires energy, which is absorbed from the surroundings, making the ice colder.
Does adding salt to ice lower its temperature and make it colder?
Yes, adding salt to ice lowers its temperature and makes it colder. This is because salt disrupts the normal freezing process of water, causing the ice to melt and absorb heat from its surroundings, making it colder.
Why does adding salt to ice make it colder in chemistry?
Adding salt to ice lowers the freezing point of water, causing the ice to melt. This process requires energy, which is taken from the surroundings, making the ice colder.
