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Alkali Cr(OH)₃+H₂O₂⇒CrO₄⁻²+H₂O THE number of OH⁻ required to balance the equation is alkali i wrote it there bcz it means in presence of



Cr(OH)₃ + 4 H₂O₂ → CrO₄⁻² + 4 H₂O + 3 OH⁻ 

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