How much water should be added to 500 mL of `N/2` NaOH solution to obtain a decinormal solution?

Explanation

To solve the problem of how much water should be added to 500 mL of `N/2` NaOH solution to obtain a decinormal solution, we can follow these steps:

### Step 1: Identify the Given Values
- Initial volume of NaOH solution (V1) = 500 mL
- Initial normality of NaOH solution (N1) = `N/2` = 0.5 N
- Desired normality of the solution (N2) = `1/10` N = 0.1 N

### Step 2: Set Up the Equation
...