How many milliliters of a 9.0 M H₂SO₄ solution are needed to make 0.25 L of a 3.5 M solution? A) 0.097 mL B) 0.64 mL C) 97 mL D) 640 mL

Question

Quizplus · Accepted Answer

The equation for dilution of solutions is M1V1 = M2V2. 
Here, we know that: 
M1 = 9.0 M (concentration of the stock solution)
V1 = unknown volume of the stock solution to be added
M2 = 3.5 M (final concentration required)
V2 = 0.25 L (final volume required)
Using the equation above, we can solve for V1: 
9.0V1 = 3.5(0.25)
V1 = 0.097 L = 97 mL (rounded to three significant figures)
Therefore, the answer is choice C.

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