PTCB PTCE Exam - Topic 1 Question 36 Discussion

Actual exam question for PTCB's PTCE exam

Question #: 36
Topic #: 1

You have been asked by the Pharmacist to prepare 3 liters of a 30% strength solution. Your pharmacy stocks the active ingredient in 8 ounce bottles of 70% strength. How many bottles of the active ingredient will you need to open to complete this request? (Hint - this is and alligation problem)

A14

B10

Show Suggested Answer

Suggested Answer: C

by Eden at May 07, 2022, 09:19 AM

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Joesph

7 months ago

3 bottles sounds way too low for this concentration.

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Michell

7 months ago

Wait, are we sure about that? Seems like a lot!

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Buddy

7 months ago

Definitely 14 bottles, I double-checked the math!

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Dalene

7 months ago

I think it's actually 10 bottles, right?

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Willodean

7 months ago

You need 14 ounces of the 70% solution for 3 liters of 30%.

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Dortha

8 months ago

I feel like I should be able to figure this out, but I can't remember if we need to convert everything to the same units first. What if I miscalculate the total volume?

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Felton

8 months ago

If I recall correctly, we need to find the difference between the strengths and then calculate how much of each solution we need. I hope I remember the right formula!

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Niesha

8 months ago

I think we practiced a similar question in class where we had to mix different strengths. I might need to double-check the calculations for the volumes.

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Kimberlie

8 months ago

I remember something about using alligation to find the amounts needed, but I'm not sure how to set it up for this specific problem.

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Dortha

8 months ago

Ugh, I hate questions about inventory management. There are so many factors to consider. I'll have to really think through the potential negatives here.

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Annamae

8 months ago

I think the answer is A, but I'm not 100% certain. I'll make a note to double-check the details of the amendment to Section 43A before submitting my final answer.

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Rickie

8 months ago

I remember we discussed thermal fatigue in class, but I'm not entirely sure if that's the main issue here with condensate in the steam.

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