more on separation glass tubing rubber stopper salt water hot plate
DESCRIPTION
glass tubing flask rubber stopper Salt water hot plate plastic tubing beaker DistillationTRANSCRIPT
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More on Separation
glass tubing rubber
stopper
Salt water
hot plate
![Page 3: More on Separation glass tubing rubber stopper Salt water hot plate](https://reader035.vdocuments.us/reader035/viewer/2022081606/5a4d1bfd7f8b9ab0599ed319/html5/thumbnails/3.jpg)
glass tubing
flask
rubber stopper
Salt water
hot plate
plastic tubing
beaker
Distillation
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#1 The salt
water boils
#2 Only the water evaporates
#3 the water condenses
…
#4 … and collects in the tube
#5 which then runs into the cup.
Liquid
Gas
Liquid Again
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• Imagine you are stranded on a deserted island and you look down beside you and find a piece of clear plastic!
• How might you clean the salty water so that you can drink it??
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Solar Still
Video
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In the natural environment, there are many other substances in water – not just salt
Not Just Salt …
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• As rainwater runs over rocks and soil, minerals are dissolved and carried away in solution.
NitrogenPhosphorousPotassiumCalciumMagnesiumCopperZincIron
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• Water that contains a lot of dissolved minerals is called hard water.
• Hard water is natural and safe to drink.
• But: - more soap to lather- soap scum on baths- ‘scaling’ in kettles
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• Water that contains few dissolved minerals is called soft water.
- rainwater
- distilled water
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