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REDUCING POWER OF HALIDES

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REDUCING POWER OF HALIDES

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    2. 2 X ? X2 + 2 e When a halide ion reduces another substance, the halide is oxidised to a halogen. This experiment compares how well the halides reduce H2SO4 to compare the reducing power of the halide ions. 2.5.3 - Reducing power of Halides

    7. Formation of hydrogen halides: NaX + H2SO4 ? NaHSO4 + HX e.g. NaCl + H2SO4 ? NaHSO4 + HCl

    9. Write half equations for: Cl ? Cl2 Br ? Br2 I ? I2 H2SO4 ? SO2 H2SO4 ? S H2SO4 ? H2S

    14. Reducing power trend

    15. Reducing power trend: Cl < Br < I When a halide ion acts as a reducing agent, it loses electrons (given to the reduced species). 2 X ? X2 + 2 e

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