Problem: The titration of a 20.0-mL sample of an H2SO4 solution of unknown concentration requires 22.51 mL of a 0.156 M KOH solution to reach the equivalence point. What is the concentration of the unknown H2SO4 solution?

🤓 Based on our data, we think this question is relevant for Professor Wilson's class at Saint Louis Community College.

FREE Expert Solution

Step 1:

22.5 mL ×10-3 L 1 mL×0.156 mol KOH1 L×1 mol OH-1 mol KOH

= 3.51x10-3 mol OH-


Step 2:

3.51×10-3 mol OH-×1 mol H+ 1 mol OH-×1 mol H2SO42 mol H+ 

= 1755x10-3 mol H2SO4


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Problem Details

The titration of a 20.0-mL sample of an H2SO4 solution of unknown concentration requires 22.51 mL of a 0.156 M KOH solution to reach the equivalence point. What is the concentration of the unknown H2SO4 solution?


Frequently Asked Questions

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.

What professor is this problem relevant for?

Based on our data, we think this problem is relevant for Professor Wilson's class at Saint Louis Community College.