Calculate the amount of water needed as a diluent to prepare 1,500 mL of a 3% sodium chloride solution using a 4.5% sodium chloride solution: ________. (Round your answer to the nearest hundredth, if needed)
Fill in the blank(s) with the appropriate word(s).
500 mL
Use the alligation method. A total of 3 parts of 4.5% sodium chloride are needed, and 1.5 parts of water are needed, for a total of 4.5 parts.
1,500 mL needed ÷ 4.5 parts = 333.33 mL per part
333.33 mL × 1.5 = 499.995 mL, rounded to 500 mL of water are needed
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