# Problem: By titration, 15.0 mL of 0.1008 M sodium hydroxide is needed to neutralize a 0.2053-g sample of an organic acid. What is the molar mass of the acid if it is monopro-tic?

###### FREE Expert Solution

Once an acid is neutralized by a base it reaches the equivalence point, where:

Also, recall that:

• moles = molarity × volume
• moles = mass/molar mass

This means:

$\overline{){{\mathbf{moles}}}_{{\mathbf{acid}}}{\mathbf{=}}{\left(\mathbf{MV}\right)}_{{\mathbf{base}}}}$

• Monoprotic acid (HA) → donates only 1 H+
• 1 mole acid reacts with 1 mole NaOH
• HA + NaOH → NaA + H2O

Solving for MMacid:

###### Problem Details

By titration, 15.0 mL of 0.1008 M sodium hydroxide is needed to neutralize a 0.2053-g sample of an organic acid. What is the molar mass of the acid if it is monopro-tic?

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What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Equivalence Point concept. If you need more Equivalence Point practice, you can also practice Equivalence Point practice problems.