NAPLEX (North American Pharmacist Licensure Examination) Practice Exam

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Ace your North American Pharmacist Licensure Examination (NAPLEX) with our comprehensive practice test. Features include interactive flashcards, multiple-choice questions, with detailed hints and explanations. Fast-track your pharmacy career today!

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What is used to calculate the new concentration in a solution?

Q1 x C1 = Q2 x C2
Wt of substance (g/L) / MW (g/mole) * (#particles) * 1000
(58.5)(i) / (MW of drug)(1.8)
g/MW

The correct answer is: Q1 x C1 = Q2 x C2

To calculate the new concentration in a solution, we use the formula Q1 x C1 = Q2 x C2, where Q represents the quantity of solution and C represents the concentration of the solution. This formula takes into account the dilution of the solution and is the most accurate method to calculate the new concentration. Option B is incorrect because it only applies to solid substances and does not take into account the change in volume of the solution. Option C is also incorrect because it is specific to a certain type of drug and does not apply to all solutions. Option D is incorrect because it only calculates the mass of a substance and does not take into account the volume of the solution.