Problem: A 26.00-mL sample of an unknown HClO4 solution requires titration with 21.92 mL of 0.2100 M NaOH to reach the equivalence point. What is the concentration of the unknown HClO4 solution? The neutralization reaction is: HClO4(aq) + NaOH(aq) → H2O(l) + NaClO4(aq)

FREE Expert Solution

Recall that at the equivalence point of a titration:


moles acid=moles base


Also, recall that moles = molarity × volume

This means:


MVacid=MVbase


Solving for Macid:


Macid26.00 mL=0.2100 MNaOH21.92 mL


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Problem Details

A 26.00-mL sample of an unknown HClO4 solution requires titration with 21.92 mL of 0.2100 M NaOH to reach the equivalence point. What is the concentration of the unknown HClO4 solution? The neutralization reaction is: HClO4(aq) + NaOH(aq) → H2O(l) + NaClO4(aq)

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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.