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NABP NAPLEX Exam - Topic 5 Question 100 Discussion

Actual exam question for NABP's NAPLEX exam
Question #: 100
Topic #: 5
[All NAPLEX Questions]

What is the amount of potassium permanganate in 300mL of a 1 in 25 solution?

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Suggested Answer: C

We have 1g of potassium permanganate in 25mL We have 300mL of solution

For every 25mL of that 300mL, we have 1g of KmnO4

300mL must have 12g of potassium permanganate (300ml/25mL)


by Tresa at Jan 25, 2025, 05:39 AM

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Jacki
3 months ago
I thought it would be less, but okay!
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Donette
3 months ago
1 in 25 means 12 grams in 300mL.
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Trina
3 months ago
Wait, how do you get that? Seems off.
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Verlene
4 months ago
Totally agree, 12 grams makes sense.
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Izetta
4 months ago
It's 12 grams in that solution!
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Casey
4 months ago
I’m leaning towards option B, 8 grams, but I can’t recall how I got there. I hope I didn’t mix up the calculations!
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Renay
4 months ago
I’m a bit confused about the units. Does the 1 in 25 mean 1 gram in 25 mL? I feel like I might have seen something like this before.
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Anglea
4 months ago
I remember practicing similar questions, and I think you multiply the total volume by the fraction to find the mass. So maybe it’s 300mL divided by 25?
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Jolanda
5 months ago
I think a 1 in 25 solution means there’s 1 part solute for every 25 parts solution, but I’m not sure how to calculate that for 300mL.
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Pauline
5 months ago
Ugh, I'm really struggling with this one. Chemistry is not my strong suit. I'm just going to guess and hope for the best.
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Mira
5 months ago
I think I've got this! We need to find the volume of the solute in the 300mL solution. Since it's a 1 in 25 solution, the volume of the solute is 1/25 of the total volume, which is 300mL. So the volume of the solute is 12mL. Now we just need to find the mass of the solute, which should be the answer.
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Jacquelyne
5 months ago
Hmm, I'm a bit confused on how to approach this. Is there a formula we need to use to calculate the amount of solute? I'm not sure if I'm remembering that correctly.
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Gabriele
5 months ago
Okay, let's think this through step-by-step. We have a 1 in 25 solution, so that means the concentration is 1 part solute to 25 parts solvent. We need to find the amount of potassium permanganate in 300mL of this solution.
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Delisa
1 year ago
I'm not sure, but I think it's D) 14 grams based on the volume of the solution.
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Tora
1 year ago
I believe it's C) 12 grams because of the concentration.
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Ceola
1 year ago
Haha, I bet the answer is C) 12 grams. That's my lucky number, so it must be the right choice!
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Julian
1 year ago
This question is a piece of cake! The answer is clearly A) 1 gram. I could do this in my sleep.
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Jesus
1 year ago
Hmm, I'm torn between C) 12 grams and D) 14 grams. I'll have to double-check my calculations.
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Romana
1 year ago
B) 8 grams
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Macy
1 year ago
A) 1 gram
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Alba
1 year ago
I think it's A) 1 gram.
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Annalee
1 year ago
B) 8 grams sounds about right to me. I remember learning about this in chemistry class.
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Lea
1 year ago
B) 8 grams
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Barrie
1 year ago
A) 1 gram
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Kendra
1 year ago
I think the answer is D) 14 grams. Potassium permanganate is a strong oxidizer, so we need to be precise with the concentration.
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Stephaine
1 year ago
I'm pretty sure it's B) 8 grams.
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Corrina
1 year ago
I think it's actually C) 12 grams.
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Susana
1 year ago
I agree, the answer is D) 14 grams.
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