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Title: How would I prepare 500 ml of a 20% salt solution? What is the Molarity of this solution? Post by: rivs9 on Feb 15, 2013 How would I prepare 500 ml of a 20% salt solution? What is the Molarity of this solution?
Title: How would I prepare 500 ml of a 20% salt solution? What is the Molarity of this solution? Post by: Riyan on Feb 15, 2013 http://www.saltinstitute.org/About-salt/Physical-properties
tells us that near room temp, 20 C,... a 20% NaCl solution has a density of 1.14779 grams / ml that's 1147.8 grams per litre 20% of 1147.8 grams = 229.56 grams of NaCl using molar mass 229.56 grams of NaCl @ 58.44 g/mol = 3.928 moles of NaCl per litre What is the Molarity of this solution your molarity of the 20% NaCl solution is 3.93 Molar (you might be expected to round off, your data only has 1 sig fig showing) ============================================================= How would I prepare 500 ml of a 20% salt solution? 1/2 of 229.56 grams of NaCl = 114.8 grams NaCl I would dissolve 115 grams of NaCl into some water, then dilute with water up to a total volume of 500 ml |