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Types of Redox Reactions

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Question

what is an acidic medium and a basic medium?

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Solution

Redox reactions are carried out in aqueous solutions. When the concentration of H⁺ is more in the solution i.e. it is acidic in nature, we call it acidic medium.

When the concentration of OH^-is more in the solution i.e. it is basic in nature, we call it basic medium.

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Q. Assertion :Sulphanilic acid migrates to anode in basic medium and to cathode in acid medium. Reason: Sulphanilic acid is a dipolar ion and exists as cation in acidic medium and as an anion in basic medium.

E_{O_{3} | O_{2}}^{0}

(acidic medium)

= 2.07

E_{O_{3} | O_{2}}^{0}

= 1.24

E_{H_{2} O_{2} | H_{2} O}^{0}

(acidic medium)

= 1.78

E_{O_{2} | H_{2} O_{2}}^{0}

(acidic medium)

= 0.695

E_{O_{2} | H_{2} O_{2}}^{0}

= 0.076

E_{H O_{2}^{-} | O H^{-}}^{0}

= 0.878

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Q. What is the colour of phenolpthalein in acidic and basic medium respectively?

Q. What is the colour of methyl orange in acidic and basic medium respectively?

Q. Write Chemical equation when

N_{2} H_{4}

N_{2}

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N_{3}^{-}

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