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a)CrO3+2KOH => K2CrO4+H2O
CrO3 +2K⁺ + 2OH⁻ =>2K⁺ +CrO4²⁻ +H2O
CrO3 + 2OH⁻ => CrO4²⁻ +H2O
b)2CrO3+2KOH => K2Cr2O7+H2O
2CrO3 +2OH⁻ => Cr2O7 ²⁻ +H2O
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