`0.45` g of a dibasic acid required 200 mL of `0.05 N` NaOH souton for neutralisation. Calculate molecular weight of the organic acid.

Explanation

To calculate the molecular weight of the dibasic acid, we can follow these steps:

### Step 1: Understand the given information
We have:
- Mass of the dibasic acid (W) = 0.45 g
- Volume of NaOH solution (V) = 200 mL = 0.200 L
- Normality of NaOH solution (N) = 0.05 N

...