Answer to Question #109271 in General Chemistry for rodaina

Question

10. A solution with 350 mL of a 2.0%w/v sodium chloride is needed. In the stockroom is a 5.0%w/v solution of sodium chloride. How many milliliters of the 5.0%w/v sodium chloride solution are necessary to make the 2.0%w/v solution?

Answer 1

(NaCl) solutions used in intravenous injections have a concentration of 0.90% NaCl (mass/volume). 4.5grams of NaCl are needed to prepare 500.0 mL of this solution How much water must evaporate from this solution to give a solution that is 9.0% NaCl