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)21.2
B)0.245
C)3.92
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. Solving for V2 gives V2 = (M1V1) / M2 = (0.0720 M * 25.0 mL) / 0.0850 M = 21.2 mL.

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