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Let the molecular weight of KBrO₃ be 'M'.
Oxidation state of Br in BrO₃⁻ :
x + 3(-2) = -1
x - 6 = -1
x = +5
Oxidation state of Br in Br⁻ :
x = -1
Thus, the oxidation state of Br in the given reaction, changes from +5 to -1.
→ n-factor = change in oxidation state = 5 - (-1) = 6
Therefore Equivalent weight of KBrO₃ = M/n-factor = M/6
Hope it helps!!
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