`[H^(+)]` of nitric acid having a pH value of 6 is ____

Answer

To find the hydrogen ion concentration \([H^+]\) of nitric acid with a pH value of 6, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the relationship between pH and hydrogen ion concentration**:
The pH of a solution is related to the hydrogen ion concentration by the formula:
\[ \text{pH} = -\log[H^+] \]

2. **Substitute the given pH value into the formula**:
We know the pH value is 6. Thus, we can write:
\[ 6 = -\log[H^+] \]

3. **Rearrange the equation to solve for \([H^+]\)**:
To isolate \([H^+]\), we can take the antilogarithm (10 raised to the power of both sides):
\[ [H^+] = 10^{-\text{pH}} = 10^{-6} \]

4. **Calculate the hydrogen ion concentration**:
Therefore, substituting the value of pH:
\[ [H^+] = 10^{-6} \, \text{mol/L} \]

### Final Answer:
The hydrogen ion concentration \([H^+]\) of nitric acid having a pH value of 6 is:
\[ [H^+] = 1 \times 10^{-6} \, \text{mol/L} \]

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