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Tuliskan persamaan tetapan kesetimbangan untuk reaksi-reaksi berikut a. Fe3+(aq) + SCN– (aq) ↔ FeSCN3+(aq) b. 3Fe(s) + 4H2O(g) ↔ Fe3O4(s) + 4H2(g)

Sagot :

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Answer:

a. [tex]K_c = \dfrac{[ FeSCN^{3+}_{(aq)}] }{[Fe^{3+}_{(aq)}] [SCN^-_{(aq)}]}[/tex]

b. [tex]K_p = \dfrac{[H_2]^4}{[H_2O]^4}[/tex]

Explanation:

Untuk semua jenis reaksi umum:

[tex]aA + bB\iff cC + dD[/tex]

Konstanta kesetimbangan [tex]K_c = \dfrac{[C]^c [D]^d}{[A]^a[B]^b}[/tex]

Dari pertanyaan yang diberikan:

a. [tex]Fe3^+_{(aq)} + SCN^-_{ (aq)} \iff FeSCN^{3+}_{(aq) }[/tex]

Konstanta kesetimbangan:

[tex]K_c = \dfrac{[ FeSCN^{3+}_{(aq)}] }{[Fe^{3+}_{(aq)}] [SCN^-_{(aq)}]}[/tex]

b. [tex]3Fe_{(s)} + 4H_2O_{(g)} \iff Fe_3O_4_{(s)} + 4H_{2(g)}[/tex]

Konstanta kesetimbangan untuk tekanan parsial [tex]K_p[/tex]

[tex]K_p = \dfrac{[H_2]^4}{[H_2O]^4}[/tex]

Karena Fe3O4 (s) hadir sebagai padatan.

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