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It melts the snow and ice making the sidewalk safer. It does pit and mar the sidewalk surface over time, making replacement necessary.
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∙ 8y ago
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Why do we put salt in the sidewalk?
Salt is often put on the sidewalk during or after it snows. This is because salt lowers the freezing point of ice. This is often just enough to melt snow at subfreezing temperatures.
What mineral would you spread on an icy sidewalk?
Rock-salt - it provides a coarse surface to aid grip - while melting the surface ice
What are irreversible materials?
melting choalate,melting ice ,dissolving salt in water
How does salt raises the melting point of water?
It doesn't increase the melting point of ice, instead, it lowers it. When a solute (which is the salt) is added to a solvent (which is what dissolves it), the boiling point is increased while both the freezing and melting points are decreased. This is evident in the boiling point elevation and the freezing/melting point depression system.
What is a physical change for salt?
For example melting and boiling of salt are physical processes.
Why does salt prevent ice from forming on sidewalk?
salt lowers ice's melting point
Is melting ice by spreading salt on an icy sidewalk a chemical or physical change?
physical change because by adding salt you are lowering its melting point thus can melt the ice at low temperature.
Would a salt spreader help me keep ice off my sidewalk?
I believe a salt spreader would be a good solution. Salt is known to react as a melting force when applied to moisture. When the pavement is dry it would be advisable to clean any particles left on the sidewalk.
What happens to the melting point of water when salt is added to it?
When salt is added to ice, the melting point goes up, causing the ice to melt faster. That's why is cities where ice frequently is one sidewalks in winter, people shovel salt onto the sidewalk.
Is salting the ice on the sidewalk a chemical change?
Yes. The melting point of salt solutions is lower than that of pure water.
Salt on sidewalk a chemical or physical?
Salt is a material not a change.
Why salt is paced on sidewalk?
Salt is added to avoid icing of roads.
Does salt on a sidewalk cause mechanical or chemical weathering to the sidewalk?
Chemical, the sodium in the salt exchanges with calcium in the concrete. The chemical products are all water soluble and the surface of the sidewalk washes away.
Why do we put salt in the sidewalk?
Salt is often put on the sidewalk during or after it snows. This is because salt lowers the freezing point of ice. This is often just enough to melt snow at subfreezing temperatures.
What are bad effects for melting ice with salt?
The ion chlorine from NaCl or CaCl2 is corrosive for metals (all type of vehicles) or roads.
What do you think salt does to the melting point of ice?
Salt lowers the melting point of ice.
Does the melting point of water change?
Yes. The freezing point of water (melting point of ice) depends on both the temperature and the pressure. One easy way to lower the pressure is to add salt to ice. This lowers its freezing point and caused it to melt. Salt is spread on street and sidewalk ice in some areas to melt it and the addition of salt to ice is also used in the cooling of ice cream.
