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Table salt melts ice the fastest

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Table salt melt the ice at  1:39:19: 33

Sea salt melt the ice at 1:41:56:43

Rock salt melt the ice at  2:00:02:17

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End- 1:39:19: 33   1st  | End- 1:41:56:17   2nd  | End- 2:00:02:17    3rd
Start- 00:00              |          Start- 00:00         |           Start- 00:00
Table salt              |              sea salt          |               rock salt

table salt rock salt sea salt

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Variables:

Independent variable:type of salt used. I used a tablespoon to equally measure each type of salt that would be placed on the ice

Dependent variable:the time that it will take to melt the ice. I used a stopwatch to record the start and stop time.

Controlled variable: ½ a cup of water that has been frozen in the same size and shape of container.1tablespoon of salt that was placed on the ice. Temperature of the room that the ice is in.

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Procedure:

I got three of the same size,shape and brand of container and poured ½ a cup of water that is  same temperature into each bowls and put them into the freezer at 12:42 pm.I then got the ice out of the freezer at 7:12pm and i then poured 1 tablespoon of sea salt in one bowl,rock salt in another bowl,and table salt in another bowl at 7:14pm and put them at the same elevation because heat rises and if one container is higher it could melt faster.

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Materials:

Water

Bowls

different kinds of Salt

Freezer

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Why does salt melt ice?

Salt works by lowering the freezing point of water. When sprinkled on ice,it makes a brine with the film of the surface of water,which lowers the freezing point and starts melting the ice that the brine is in contact with-to a point. -Feb 25, 2014

https://www.treehugger.com/clean-water/why-does-salt-melt-ice-and-what-else-it-doing.html

What is brine?

Brine, saltwater,particularly a high concentrated water solution of common salt (sodium chloride)

- Jul 20,1998

https://www.britannica.com/science/brine

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If people use rock salt to melt ice or snow,i believe rock salt will melt the ice the fastest

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Which salt can melt ice the fastest?