Answer
$0.0100M HCl$ is more acidic.
Work Step by Step
1. Identify the electrolytes:
First solution:
- $HCl$: Strong acid.
Second solution:
- $KOH$: Strong base.
2. Determine which one is more acidic.
- $HCl$ is more acidic, because it is a strong acid, and $KOH$ isn't an acid.