The pH of a solution is 8.4. Determine the hydrogen ion concentration [H+] of this solution

The pH of a solution is related to the hydrogen ion concentration \([H^+]\) by the formula:

\[
\text{pH} = -\log[H^+]
\]

To find \([H^+]\), we rearrange the formula:

\[
[H^+] = 10^{-\text{pH}}
\]

Given that the pH is 8.4:

\[
[H^+] = 10^{-8.4}
\]

Now, let's calculate the hydrogen ion concentration:

\[
[H^+] \approx 3.98 \times 10^{-9} \text{ M}
\]

So, the hydrogen ion concentration \([H^+]\) of the solution is approximately \(3.98 \times 10^{-9}\) M.

Would you like more details or have any questions?

Here are some related questions you might find interesting:
1. What is the pOH of the solution if the pH is 8.4?
2. How do you calculate pH if you know the hydrogen ion concentration?
3. What is the relationship between pH and acidity?
4. How does a change in pH affect the hydrogen ion concentration?
5. What is the pH of a solution with a hydrogen ion concentration of \(1 \times 10^{-7}\) M?

**Tip:** Always remember that a lower pH indicates a higher concentration of hydrogen ions, meaning the solution is more acidic.

Learn how to calculate the hydrogen ion concentration from a pH of 8.4 using the pH formula. Understand the relationship between pH and hydrogen ion concentration in acidic and basic solutions. Suitable for advanced high school students studying chemistry.

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