tgif22 Posted February 3, 2018 Share Posted February 3, 2018 For demonstration purposes, (to float things on) I am bringing two tubs of water to my presentation - one with the salinity of normal water, and one with that of the Dead Sea. From my understanding, since the dead sea is 34.2% salt, if I mixed 684g of salt with 2kg of distilled water, would that accurately represent the water in the Dead Sea? Link to comment Share on other sites More sharing options...
studiot Posted February 3, 2018 Share Posted February 3, 2018 8 hours ago, tgif22 said: For demonstration purposes, (to float things on) I am bringing two tubs of water to my presentation - one with the salinity of normal water, and one with that of the Dead Sea. From my understanding, since the dead sea is 34.2% salt, if I mixed 684g of salt with 2kg of distilled water, would that accurately represent the water in the Dead Sea? I think you will find that salinity is expressed in (grams of solute per kilogram of solution) x 100 when expressed as a precentage. So 32.4% salinity is 32.4 grams of salt per 1000g of soution. Link to comment Share on other sites More sharing options...
tgif22 Posted February 3, 2018 Author Share Posted February 3, 2018 8 hours ago, studiot said: I think you will find that salinity is expressed in (grams of solute per kilogram of solution) x 100 when expressed as a precentage. So 32.4% salinity is 32.4 grams of salt per 1000g of soution. https://www.sciencedaily.com/terms/seawater.htm but from this article, it says that the ocean has a salinity of 3.5%, and it says that means 35 parts-per-thousand. I'm not sure that I understand? 8 hours ago, studiot said: I think you will find that salinity is expressed in (grams of solute per kilogram of solution) x 100 when expressed as a precentage. So 32.4% salinity is 32.4 grams of salt per 1000g of solution. and this article says that there'd be around 250g of salt left if you boiled a liter of dead sea water. http://www.sciencefocus.com/qa/how-much-salt-there-dead-sea Link to comment Share on other sites More sharing options...
studiot Posted February 3, 2018 Share Posted February 3, 2018 (edited) Have you tried looking it up in a more reliable place? https://en.wikipedia.org/wiki/Saline_water For instance the maximum amount of salt you can dissolve in 1 litre of room temperature water is a little over 260 grams and you wanted to add 342. The salinity of the open ocean is about 36 parts per thousand or 36 grams per litre. I haven't looked up the dead sea, Have you? 11 hours ago, studiot said: I think you will find that salinity is expressed in (grams of solute per kilogram of solution) x 100 when expressed as a precentage. So 32.4% salinity is 32.4 grams of salt per 1000g of soution. Yes you are right I should have said 32.4 grams per 100 grams of solution. Sorry, I confused o/o and o/oo Edited February 3, 2018 by studiot Link to comment Share on other sites More sharing options...
Sensei Posted February 4, 2018 Share Posted February 4, 2018 (edited) On 3.02.2018 at 2:07 AM, tgif22 said: For demonstration purposes, (to float things on) I am bringing two tubs of water to my presentation - one with the salinity of normal water, and one with that of the Dead Sea. From my understanding, since the dead sea is 34.2% salt, if I mixed 684g of salt with 2kg of distilled water, would that accurately represent the water in the Dead Sea? If you will mix 684 g of salt with 2000 g of water you will have total mass 2684 grams. 684 g / 2684 g = ~ 0.255 = ~ 25.5% by mass. According to wikipedia page about Dead Sea: "With a salinity of 342 g/kg, or 34.2%, (in 2011), " https://en.wikipedia.org/wiki/Dead_Sea but it's not only NaCl! References that you should read: https://en.wikipedia.org/wiki/Mass_concentration_(chemistry) https://en.wikipedia.org/wiki/Mass_fraction_(chemistry) 4 hours ago, studiot said: For instance the maximum amount of salt you can dissolve in 1 litre of room temperature water is a little over 260 grams and you wanted to add 342. https://en.wikipedia.org/wiki/Sodium_chloride Sodium Chloride has solubility in water ~ 359 g/L Here you have table how it changes with temperature: https://en.wikipedia.org/wiki/Solubility_table But Dead Sea is not just NaCl, but many other salts mixed together: https://en.wikipedia.org/wiki/Dead_Sea_salt Summing mg/L from the table we can get 338 g/L Notice that there is more Magnesium Chloride, and it has solubility 558 g/L @ 30 C. "Most oceanic salt is approximately 85% sodium chloride (the same salt as table salt) while Dead Sea salt is only 30.5% of this, with the remainder composed of other dried minerals and salts." Edited February 4, 2018 by Sensei 1 Link to comment Share on other sites More sharing options...
tgif22 Posted February 4, 2018 Author Share Posted February 4, 2018 Thank you for the answers. To sum it up, if if I dissolved 684g of salt into 1316g of near-boiling water, it would be roughly 34.2% salt. Correct? Link to comment Share on other sites More sharing options...
studiot Posted February 4, 2018 Share Posted February 4, 2018 Thank you Sensei. +1 Link to comment Share on other sites More sharing options...
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