1. In what proportion should alcohols of 95% and 50% strengths be mixed to make 70% alcohol?

Curren'S Math For Meds: Dosages & Sol
11th Edition
ISBN:9781305143531
Author:CURREN
Publisher:CURREN
Chapter9: Parenteral Medication Labels And Dosage Calculation
Section: Chapter Questions
Problem 11SST
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1. In what proportion should alcohols of 95% and 50% strengths be mixed to make 70% alcohol? 2. A Hospital pharmacist wants to use three lots ZnO ointment containing repectively 50%, 20% and 5% ZnO. In what proportion should they be mixed to prepare a 10% ZnO ointment?
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