The concentration of hydrogen ion in a sample of soft drink is `2.8 xx 10^(-4)M`. What is its `pH`?

Explanation

To find the pH of a soft drink given the concentration of hydrogen ions, we can follow these steps:

### Step 1: Understand the formula for pH
The pH is calculated using the formula:
\[ \text{pH} = -\log [\text{H}^+] \]
where \([\text{H}^+]\) is the concentration of hydrogen ions in moles per liter (M).
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