Sebacic Acid (HOOC−(CH₂)₈−COOH) Is a Naturally Occurring Dicarboxylic Acid That

Sebacic acid (HOOC−(CH₂) ₈−COOH) is a naturally occurring dicarboxylic acid that is also found as a normal urinary acid.  Which procedure should be followed to determine the amount of sebacic acid present in 200 mg of an unknown sample composed primarily of sebacic acid and a small percentage of neutral impurities?

A) Dissolve the sample in 0.1 M acid, then titrate the solution with 0.1 M base and an indicator.
B) Dissolve the sample in 0.1 M acid, then titrate the solution with 0.1 M acid and an indicator.
C) Dissolve the sample in 0.1 M base, then titrate the solution with 0.1 M base and an indicator.
D) Dissolve the sample in 0.1 M base, then titrate the solution with 0.1 M acid and an indicator.

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