How much should the `H^+` concentration of a sodium be changed to raise the pH by unity?

Explanation

To solve the problem of how much the \( H^+ \) concentration of a sodium solution should be changed to raise the pH by unity, we can follow these steps:

### Step 1: Understand the relationship between pH and \( H^+ \) concentration
The pH of a solution is defined by the formula:
\[ \text{pH} = -\log [H^+] \]
This means that as the concentration of hydrogen ions (\( H^+ \)) increases, the pH decreases, and vice versa.
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