A 22.0-mL sample of an unknown H3PO4 solution is titrated with a 0.110 M NaOH solution. The...


A 22.0-mL sample of an unknown {eq}H_3PO_4 {/eq} solution is titrated with a 0.110 M {eq}NaOH {/eq} solution. The equivalence point is reached when 18.60 mL of {eq}NaOH {/eq} solution is added. What is the concentration of the unknown {eq}H_3PO_4 {/eq} solution?

Titration of Weak Acid:

The titration of a weak acid is carried out using a strong base because a strong base will continue to react with the weak acid unit all of the strong base has been exhausted. As such, there will be no unnecessary equilibrium reactions occurring during the titration.

Answer and Explanation: 1

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The reaction between phosphoric acid and NaOH is:

{eq}H_3PO_4 + 3NaOH \to Na_3PO_4 + 3H_2O {/eq}

From the reaction, 1 mole of phosphoric acid...

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Neutralization Reaction: Definition, Equation & Examples


Chapter 4 / Lesson 6

Learn about neutralization definition and various types of acid-base neutralization reaction examples. Understand weak acids and bases, and the applications of neutralization reaction.

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