How many milliliters of 0.0850 M NaOH are required to titrate 25.0 mL of 0.0720 M HBr to the equivalence point?
A) 3.92
B) 21.2
C) 0.245
D) 0.153
E) 29.5

Question

Quizplus · Accepted Answer

To find the volume of NaOH needed, use the formula M1V1 = M2V2, where M1 and V1 are the molarity and volume of HBr, and M2 and V2 are the molarity and volume of NaOH. (0.0720 M)(25.0 mL) = (0.0850 M)(V2). Solving for V2 gives 21.2 mL.

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