Number of milli equivalents of solute in 0.5 litres of 0.2 N solution is

Options

A. 10
B. 1
C. 100
D. 1000

Explanation

To find the number of milli equivalents of solute in a 0.5 liters of 0.2 N solution, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Definition of Normality (N)**:
Normality (N) is defined as the number of equivalents of solute per liter of solution. The formula is:
\[ N = \frac{\text{Number of equivalents}}{\text{Volume of solution in liters}} \]

2. **Convert Normality to Milli Equivalents**:
Since we need to find the number of milli equivalents, we can modify the formula to:
\[ N = \frac{\text{Number of milli equivalents}}{\text{Volume of solution in milliliters}} \]

3. **Rearranging the Formula**:
Rearranging the formula to find the number of milli equivalents:
\[ \text{Number of milli equivalents} = N \times \text{Volume of solution in milliliters} \]

4. **Substituting Given Values**:
We are given:
- Normality (N) = 0.2 N
- Volume of solution = 0.5 liters

First, convert the volume from liters to milliliters:
\[ 0.5 \text{ liters} = 0.5 \times 1000 = 500 \text{ milliliters} \]

5. **Calculating the Number of Milli Equivalents**:
Now, substitute the values into the formula:
\[ \text{Number of milli equivalents} = 0.2 \times 500 = 100 \]

### Final Answer:
The number of milli equivalents of solute in 0.5 liters of 0.2 N solution is **100 milli equivalents**.

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