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Titration of Unknown Acid

APCHEM-QNLLCO

100 mL of a 0.25 M $Ba(OH)_2$ solution was used to titrate 12.5 mL of a $HNO_3$ solution to neutralization.

Which of the following was the concentration of the acid?

A

1.0 M

B

2.0 M

C

3.0 M

D

4.0 M