What volume of 2.00 % NaCl must be diluted to make 10.00 mL of 0.90% NaCl, also known as normal saline solution?

Name: What volume of 2.00 % NaCl must be diluted to make 10.00 mL of 0.90% NaCl, also known as normal saline solution?
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Quizplus · Accepted Answer

Using the dilution formula C1V1 = C2V2, where C1 is the initial concentration (2.00%), V1 is the volume to find, C2 is the final concentration (0.90%), and V2 is the final volume (10.00 mL). Solving for V1 gives V1 = (C2 * V2) / C1 = (0.90% * 10.00 mL) / 2.00% = 4.5 mL.

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