### Formula For pKa Calculator

**Understanding the pKa Formula:**The pKa formula used in the calculator is explained in detail. It involves taking the negative logarithm (base 10) of the ratio of the conjugate base concentration (A-) to the acid concentration (HA). This ratio represents the extent of dissociation of the acid, and the resulting pKa value is a measure of the solution’s acidity.

pKa=−log10([HA][A-])

### User Input

**Prompting for Concentrations:**The calculator begins by prompting the user to enter numerical values for the concentration of an acid (HA) and its conjugate base (A-).

### Validation

**Input Verification:**Upon user submission, the JavaScript function`calculatepKa()`

verifies the user’s input to ensure that valid numerical values have been entered.

### Calculation

**Formula Application:**If the input values are valid and the conjugate base concentration (A-) is not zero, the calculator proceeds to calculate the pKa value using a mathematical formula.

### Display Result

**Result Presentation:**The calculated pKa value is then displayed on the web page in a designated`div`

element with the id “result.” The result is formatted to show two decimal places for clarity.

### Conclusion

**Interpreting Results:**The pKa value, once calculated, serves as an indicator of the solution’s acidity. A lower pKa value suggests a stronger acid, while a higher pKa value indicates a weaker acid.

This breakdown of headings provides a clear overview of how the pKa calculator works and how it utilizes the pKa formula to determine the acidity of a solution based on user-provided concentrations of an acid and its conjugate base.