Problem: What volume of a 0.5 M aqueous solution of HCl is needed to reach the equivalence point in a titration of 25 mL of a 0.1 M aqueous solution of potassium hydroxide (KOH)?A. 5 mLB. 25 mLC. 50 mLD. 500 mLE. none of the above

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We’re being asked to determine the volume of HCl based on a neutralization reaction. The reaction of KOH with HCl is as follows:

KOH(aq) + HCl(aq)  KCl (aq) + 2 H2O(I)


It required 25 mL of 0.1 M KOH solution to neutralize 0.5 M HCl solution. For this problem, we need to:


Recall that molarity is given by:

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Problem Details

What volume of a 0.5 M aqueous solution of HCl is needed to reach the equivalence point in a titration of 25 mL of a 0.1 M aqueous solution of potassium hydroxide (KOH)?

A. 5 mL

B. 25 mL

C. 50 mL

D. 500 mL

E. none of the above

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