Calculate the amount of water needed to prepare 600 mL of 0.9% sodium chloride solution, using a stock solution of 5% sodium chloride: ________.
Fill in the blank(s) with the appropriate word(s).
492 mL
Use the alligation method. A total of 0.9 part of 5% sodium chloride solution and 4.1 parts of water are needed, for a total of 5 parts.
600 mL needed ÷ 5 parts = 120 mL per part
120 mL × 4.1 = 492 mL of water
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