Highest Ph Acids Aabda6

1. **State the problem:** We want to find the highest pH when comparing different acids. 2. **Recall the formula:** pH is calculated as $$\text{pH} = -\log[\text{H}^+]$$ where $[\text{H}^+]$ is the concentration of hydrogen ions. 3. **Important rule:** Stronger acids have higher $[\text{H}^+]$ and thus lower pH. Weaker acids have lower $[\text{H}^+]$ and higher pH. 4. **Compare acid strengths:** To find the highest pH, identify the acid with the lowest $[\text{H}^+]$ or the weakest acid. 5. **Use acid dissociation constant $K_a$:** Smaller $K_a$ means weaker acid and higher pH. 6. **Calculate pH for each acid:** Use $$[\text{H}^+] = \sqrt{K_a \times C}$$ where $C$ is the acid concentration. 7. **Example:** If acid A has $K_a = 1 \times 10^{-3}$ and acid B has $K_a = 1 \times 10^{-5}$ at the same concentration, acid B has higher pH. 8. **Summary:** The acid with the smallest $K_a$ or weakest strength has the highest pH.