pH of Indicator Calculator
Calculate the pH of an indicator solution using the Henderson–Hasselbalch equation:
\[
\text{pH} = \text{p}K_{in} + \log\left(\frac{[\text{In}^-]}{[\text{HIn}]}\right)
\]
* Enter the indicator's pK₍in₎ and the ratio [In⁻]/[HIn].
Step 1: Enter Indicator Parameters
Example: 7.00 (typical for many indicators)
Example: 1 (equal amounts give pH = pKin)