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01.04 Properties of Water

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rosemilande pierre

on 31 January 2015

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Transcript of 01.04 Properties of Water

01.04 Properties of Water
Research
Salt Lowers the temperature at which water freezes and melts. pure water, H2O Freezes as well as melts at, 0c (32 F). but when salt is added, the freezing point is dropped.


salt and water, as different substances, they carry different chemical properties. salt " gets in the way"
of the interactions between H and O, Making it hard For H and O to Bond as ice.
hypothesis, procedure, & Observations
Hypothesis - a supposition or proposed explanation made on the basis of limited evidence as a starting point for further investigation.
how does adding salt affect the freezing point of water ?
It's pure water than freezes at zero degrees. Water with salt in it is a different substance with a different freezing point.
conclusion
salt lowers the temperature at which freezes.
Procedure/Observations - First i took two cups of water , (one with added salt). I placed both cups into the freezer and timed it to a minimum of 60 minutes. checking my results, i noticed that the cup of clean water , had aready formed an ' ice sculpture' of the cup, begin frozen everywhere but in the center. the cup of salty water had slight crystals floating at the surface of the water, and that's all there was
rosemilande Pierre
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