Ordered: 100 mL q2h of a 25 % solution for an irrigation
a. How many mL of the active ingredient will you prepare?
b. What is the ratio of the active ingredient to the inactive ingredient?
a. 25 mL (25% of 100 = 25 or strength or 1 out of 4 parts )
b. 1:3 (1 part plus 3 parts = 4 total parts)
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