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Title: What is the molar concentration of a saline solution make of 20g of NaCl in a total volume of 100ml? Post by: oangi on Sep 14, 2012 What is the molar concentration of a saline solution make of 20g of NaCl in a total volume of 100ml?
Title: What is the molar concentration of a saline solution make of 20g of NaCl in a total volume of 100ml? Post by: tonydungy on Sep 14, 2012 molar concentration = moles / Volume solution
molarity is defined as moles / L solution moles = mass / mw mw NaCl = 58.4 g/mole moles = 20g x (1 mole / 58.4 g) = 0.342 moles so molarity = 0.342 moles / 100 ml x (1000 ml / L) = 3.42 molar Title: What is the molar concentration of a saline solution make of 20g of NaCl in a total volume of 100ml? Post by: tonyduong15 on Sep 14, 2012 20 g NaCl x (1 mol NaCL / 58.443 g ) = 0.3422 mol NaCL
100ml x (1L / 1000 ml) = 0.1 L M (molarity) = mol/L M = 0.3422 mol/ 0.1 L M = 3.422 M |