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Chemistry- HW Check

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I have seven homework problems. I did them but I wasn't sure if I did them correctly. Did I do them correct? Thank you!


Give the reaction that describes how the hydrazine, N2H4(aq), / hydrazinium ion, N2H51+(aq), buffer reacts with a strong base such as sodium hydroxide.

N2H4(aq) + OH^1-(aq) --> N2H51+(aq) + H2O(l)

Give the reaction that describes how the sodium bicarbonate / sodium carbonate buffer reacts with a strong base such as sodium hydroxide

H2CO3(aq) + OH^1-(aq) --> HCO3^1-(aq) + H2O(l)

Give the reaction that describes how the sodium hydrogen phosphate / sodium phosphate buffer reacts with a strong base such as sodium hydroxide

HPO4^2-(aq) + OH^1-(aq) --> PO4^3-(aq) + H2O(l)

Give the reaction that describes how the trimethylamine, (CH3)3N(aq) / trimethylammonium ion, (CH3)3NH1+(aq), buffer reacts with a strong acid such as hydrochloric acid

(CH3)3NH1+(aq) + H3O^1+(aq) --> (CH3)3N(aq) + H2O(l)

Give the reaction that describes how the ethylamine, C2H5NH2(aq), / ethylammonium ion, C2H5NH31+(aq), buffer reacts with a strong acid such as hydrochloric acid

C2H5NH31+(aq) + H3O^1+(aq) --> C2H5NH2(aq) + H2O(l)

Give the reaction that describes how the hydrofluoric acid / sodium fluoride buffer reacts with a strong acid such as hydrochloric acid.

F^1-(aq) + H3O^1+(aq) --> HF(aq) + H2O(l)

  • Chemistry- HW Check -

    Give the reaction that describes how the hydrazine, N2H4(aq), / hydrazinium ion, N2H51+(aq), buffer reacts with a strong base such as sodium hydroxide.

    N2H4(aq) + OH^1-(aq) --> N2H51+(aq) + H2O(l)

    I don't think so. The OH^- will react with the acid, N2H5^+, like this
    N2H5^+ + OH^- ==> H2O + N2H4


    Give the reaction that describes how the sodium bicarbonate / sodium carbonate buffer reacts with a strong base such as sodium hydroxide

    H2CO3(aq) + OH^1-(aq) --> HCO3^1-(aq) + H2O(l)
    HCO3^- is the acid in the HCO3^-/CO3^2- system. H2CO3 isn't there so you can't use that.
    HCO3^- + OH^- ==> H2O + CO3^2-


    Give the reaction that describes how the sodium hydrogen phosphate / sodium phosphate buffer reacts with a strong base such as sodium hydroxide

    HPO4^2-(aq) + OH^1-(aq) --> PO4^3-(aq) + H2O(l)
    This looks ok.

    Give the reaction that describes how the trimethylamine, (CH3)3N(aq) / trimethylammonium ion, (CH3)3NH1+(aq), buffer reacts with a strong acid such as hydrochloric acid

    (CH3)3NH1+(aq) + H3O^1+(aq) --> (CH3)3N(aq) + H2O(l)
    The base is what reacts with the acid; therefore,
    (CH3)3N(aq) + HCl ==> (CH3)3NH^+ + Cl^-


    Give the reaction that describes how the ethylamine, C2H5NH2(aq), / ethylammonium ion, C2H5NH31+(aq), buffer reacts with a strong acid such as hydrochloric acid

    C2H5NH31+(aq) + H3O^1+(aq) --> C2H5NH2(aq) + H2O(l)
    Same comment as the trimethylamine above.

    Give the reaction that describes how the hydrofluoric acid / sodium fluoride buffer reacts with a strong acid such as hydrochloric acid.

    F^1-(aq) + H3O^1+(aq) --> HF(aq) + H2O(l)
    This looks ok to me.

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