PTCB PTCE Exam - Topic 7 Question 12 Discussion

Actual exam question for PTCB's PTCE exam

Question #: 12
Topic #: 7

How many milligrams of atropine sulfate are needed to make 30ml of a 1:200 solution?

A1.5

B15

C150

D1,500
Explanatin:
Following formula:
Final volume X % (expressed as a decimal)= amount of active ingredient(g). The final volume is 30ml and 1:200 can be expressed as 1/200 or 0.005g. Multiplying 0.15g x 1000mg/g (changing grams to milligram...) will yeald 150mg.

Show Suggested Answer

Suggested Answer: A

by Carmela at May 04, 2022, 04:43 PM

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Haydee

7 months ago

Just did the math, and it adds up!

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Lisha

7 months ago

Yup, 150mg checks out!

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Rolf

7 months ago

Wait, are we sure about that? Seems high.

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Anabel

7 months ago

Totally agree, it's 150mg!

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Shanda

7 months ago

You need 150mg for a 1:200 solution in 30ml.

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Elly

8 months ago

I keep second-guessing myself on these calculations. Was it 1:200 or 200:1? I hope I didn't mix that up!

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Marshall

8 months ago

I think the formula we used in class was something like final volume times the concentration. It feels like 150 mg could be the right answer.

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Laurene

8 months ago

I remember practicing similar questions about dilutions, but I'm not entirely sure if I got the conversion right.

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Jesusita

8 months ago

I definitely recall that 1:200 means there's a small amount of active ingredient, but I can't remember if it was 150 mg or something else.

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Gilberto

8 months ago

Hmm, this seems like a tricky one. The complexity to automate the GUI with the third-party controls could be a real challenge. I'll need to think carefully about the best approach.

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Josue

8 months ago

I've reviewed similar questions before, so I think I can narrow this down and make an educated guess.

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