Derive a formula to calculate the normality of an acid of sp. Gr 'd' containing x % by weght . The eq. wt of the acid is E .

Explanation

To derive the formula for calculating the normality of an acid with specific gravity \( d \), containing \( x \% \) by weight, and with an equivalent weight \( E \), we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Definitions**:
- **Specific Gravity (d)**: This is the density of the solution in grams per milliliter (g/ml).
- **Percentage by Weight (x%)**: This indicates that in 100 grams of the solution, there are \( x \) grams of the acid.
- **Equivalent Weight (E)**: This is the weight of the acid that can donate or accept one mole of hydrogen ions (H⁺) in a reaction.
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