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? asked in Science & MathematicsChemistry · 1 decade ago

Chemistry-- please help!?

The question is:-

When iron (II) sulfate OR iron (III) chloride reacts with sodium hydroxide, an iron hydroxide is formed. What evidence suggests that iron (II) hydroxide and iron (III) hydroxide are actually different substances.

Regards and Thanks.

2 Answers

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  • 1 decade ago
    Favorite Answer

    *) iron (II) sulfate + sodium hydroxide

    FeSO4 + 2NaOH ---> Fe(OH)2 + Na2SO4

    *) iron (III) chloride + sodium hydroxide

    FeCl3 + 3NaOH ---> Fe(OH)3 + 3NaCl

    ------

    Fe(OH)2=iron (II) hydroxide

    Fe(OH)3=iron (III) hydroxide

    So it's different, isn't it?

  • 1 decade ago

    Look at the (II) and (III), this represents the charge of the cation.

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