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Because the oxide ion is basic, metal oxides react readily with acids.

(a) Write the net ionic equation for the following reaction. (Use the lowest possible coefficients. Include states-of-matter under SATP conditions in your answer.)
FeO(s) + 2 HClO4(aq) Fe(ClO4)2(aq) + H2O(l)

i know the ansewr is FeO(s) + 2H^+(aq) --> Fe^2+(aq) + H_2O(l)but i do not know why. how do you know that HClo4 and Feclo4 split?

  • chem -

    One of the reaction types you memorize. acid + base = salt + water.
    base (FeO) + acid(HClO4) = salt [Fe(ClO4)] + water (H2O).

  • chem -

    Use the solubility rules. If a compound is aqueous it splits into its ions, while if it is a solid (like FeO) or a liquid (like H2O) they ions do not separate. Hope this helps!

  • chem -

    When dealing with acids and dissociating, remember that only certain acids dissociate. Those are the strong acids and they are: HCl, HBr, HI, NHO_3, H_2SO_4, HClO_3, and HClO_4. All other acids not listed are weak acids. Perchlorate splits because it is a strong acid. Remember that even if it says it is aqueous because it is an acid (all acids are aqueous), it may not dissociate because it could be a weak acid!
    According to solubility rules, all soluble salts dissociate, and FeClO_4 is considered a soluble salt. Hope this helps!

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