Make the following solution isotonic with respect to membrane. Provided that you have isotonic diluting solution,  calculate the volume in mL of isotonic solution that may be prepared by mixing drug with water. Rx         Phenacaine (E = 0.20)          0.06 g         Sterile water, ad                  100 mL Sig. make isotonic solution   INSTRUCTIONS: Justify your answer through calculations which contains; GIVEN FORMULA USED SUBSTITUTION CALCULATED VALUE FINAL ANSWER

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