The flocculation value of HCl for arsenic sulphide sol. is 30 m `molL^-1`. If `H_2SO_4` is used for the flocculation of arsenic sulphide, the amount, in grams, of `H_2SO_4` in 250 ml required for the above purpose is __________ . (molecular mass of `H_2SO_4 = 98g//mol)`

Explanation

To solve the problem, we need to find the amount of \( H_2SO_4 \) required to flocculate arsenic sulfide in a 250 ml solution, given that the flocculation value of \( HCl \) is 30 m mol/L.

### Step-by-Step Solution:

1. **Understanding Flocculation Value**:
The flocculation value indicates the minimum amount of electrolyte needed to cause complete coagulation of a colloidal solution. For \( HCl \), the flocculation value is given as 30 m mol/L.

2. **Determine the Equivalent Normality**:
...