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o asked in Science & MathematicsChemistry · 9 years ago

Metal + cold water vs. metal + steam?

I have been told that:

metal + cold water -> metal hydroxide + hydrogen

metal + steam -> metal oxide + hydrogen

...yet stream and water are the same thing, can anyone explain this or am I missing something?

Update:

@Nakk oxide = MO, hydroxide = MOH ---- where M = metal ????

Update 2:

@Dan but why? steam and water have the same formula.

2 Answers

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  • 9 years ago
    Favorite Answer

    Oxide and hydroxide use the same elements but differ in how they are bonded.

    Edit: Oxide is oxygen bonded with anything. Hydroxide is oxygen bonded with hydrogen. Steam is water in an accelerated, spaced out, heated state. The ONLY difference in the 2 reactions is the hydrogen loses it's bond in the reaction with steam.

  • Daniel
    Lv 4
    9 years ago

    Long story short, it's because of the temperature and state of matter of the water. As cold water, it's cold liquid. As steam, it's a hot gas. This affects how the metal absorbs it.

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