At `25^(@)C`, the `[H^(+)]` of a solution is `2 xx 10^(-9) M`, the nature of the solution is

Options

A. Neutral
B. Acidic
C. Basic
D. Can not be predicted

Explanation

To determine the nature of the solution based on the concentration of hydrogen ions \([H^+]\), we can follow these steps:

### Step 1: Identify the given concentration of \([H^+]\).
The concentration of hydrogen ions in the solution is given as:
\[ [H^+] = 2 \times 10^{-9} \, \text{M} \]

### Step 2: Compare the \([H^+]\) concentration with \(10^{-7} \, \text{M}\).
We need to compare this value with \(10^{-7} \, \text{M}\), which is the concentration of hydrogen ions in pure water at \(25^\circ C\).

Since:
\[ 2 \times 10^{-9} \, \text{M} < 10^{-7} \, \text{M} \]

### Step 3: Determine the pH of the solution.
The pH of a solution can be calculated using the formula:
\[ \text{pH} = -\log[H^+] \]

Calculating the pH:
\[ \text{pH} = -\log(2 \times 10^{-9}) \approx 8.7 \]

### Step 4: Analyze the pH value.
Since the pH is greater than 7, this indicates that the solution is basic (alkaline).

### Conclusion:
The nature of the solution is **basic**.

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