हाउ विल यू सेपरेट ए मिक्सचर ऑफ़ विलास पेपर सेंड सेंड
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The separation of mixtures is a fundamental science experiment that is performed in many classrooms around the world to teach students the basics of procedures like filtration, heating, and evaporation. When attempting to separate a mixture of sand and salt, you'll need some standard lab equipment like glass containers, filter paper and a bunsen burner.
Fill a test tube about half-way with the sand-salt mixture.
Pour water into the test tube. Use enough water to completely submerge the sand-salt mixture.
Stir or shake the mixture for a few minutes so that the salt dissolves in the water. The sand is insoluble, so it will remain visible.
Curl a piece of filter paper into a cone shape and place it in a filter funnel.
Pour the mixture through the filter funnel into a crucible or evaporating basin. The filter paper will hold back the sand and only allow the salt solution to pass through it.
Place the crucible containing the salt solution on a tripod, and heat the bottom of it with a bunsen burner. After a while, the water will evaporate, leaving only the salt crystals behind.
Place the wet filter paper with the sand under a heat lamp or leave it in the sun to dry it out.
Scrape the salt crystals out of the crucible. You should now be left with a pile of sand and a pile of salt, having successfully separated the two from the mixture.
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How to Whiten Sand
Updated April 24, 2017
By Mary Johnson-Gerard, Ph.D.
Sand is available in many forms for purchase. If you want pure white sand you will need to get it from a beach that creates white sand, such as Destin, Florida, or from a craft store. Pure white sand is chemically dyed. Natural sand gets it pigment from the things it is made up of. Different varieties of dirt, shells, gravel and organic material color the sand. If you have particularly dingy or brown sand, you can lighten it by bleaching it in the sun. It may not get pure white, but the sun will lighten it considerably.
Spread the sand in shallow trays, such as cookie sheets or plastic tubs, so that it's one-half-inch thick. It needs to be thin for the sun to penetrate all the grains.
Place the trays in a sunny spot where the sand will be protected from moisture. Don't put it outside until there are a few sunny days in the forecast.
Bleach the sand in the sunlight for two to three days. Stir it around with your hand and spread it back out once a day.
Leave it out longer to lighten it more. It will not lighten to a bright white no matter how long it sits in the sun.
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