Calculate the equivalent weight of `SO_2` in the following reactions:
(a) `SO_(2) + 2H_(2) S = 3 S + 2H_(2) O`
(b) `5SO_(2) + 2KMnO_(4) + 2H_(2) O = K_(2) SO_(4) + 2MnSO_(4) + 2H_(2) SO_(4)`

Explanation

To calculate the equivalent weight of \( SO_2 \) in the given reactions, we will follow these steps:

### Step 1: Understand the concept of equivalent weight
The equivalent weight of a substance is defined as the mass of the substance that will combine with or displace 1 mole of hydrogen atoms (or 1 mole of electrons in redox reactions). It can be calculated using the formula:

\[ \text{Equivalent weight} = \frac{\text{Molecular weight}}{n} \]
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