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27 April, 14:26

Using 10 grams of a 15% boric acid ointment, the pharmacist will manufacture a 12% ointment. how many milligrams of diluent is required? round the answer to the nearest wholenumbe

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  1. 27 April, 14:36
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    Use equation C1M1+C2M2=CM

    C1=15%, M1=10000 mg (starting ointment)

    C2=0% M2=to be found (diluent)

    C=12% M=M1+M2 (product)

    Solve for M2

    0.15*10000+0*M2 = 0.12 (10000+M2)

    M2 = (0.15-0.12) * 10000/0.12=2500 mg

    Answer: 2500 mg of diluent is required.
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