
CHEMICAL EQUILIBRIUM - G11 UNIT TEST
Authored by Brenda Siringoringo
Chemistry
11th Grade

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8 questions
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1.
OPEN ENDED QUESTION
10 mins • 20 pts
Proses pembuatan asam sulfat disebut proses kontak. Gas SO 3 merupakan bahan baku pembuatan asam sulfat yang diperoleh dari reaksi berikut. 2SO2 (g) + O2 (g) --> 2SO 3 (g) ΔH = –45,2 kkal
Jelaskan perlakuan yang dapat diberikan agar jumlah gas SO 3 yang dihasilkan maksimum!
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2.
OPEN ENDED QUESTION
10 mins • 20 pts
Diketahui reaksi pembakaran gas amonia sebagai berikut. 4NH 3 (g) + 5O 2 (g) -> 4NO(g) + 6H 2 O(l) ΔH = –907 kJ. Keadaan partikel saat terjadi kesetimbangan awal sebagai berikut.
Jelaskan perlakuan yang telah diberikan dalam sistem kesetimbangan tersebut!
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3.
OPEN ENDED QUESTION
5 mins • 20 pts
Reaksi yang terjadi dalam darah sebagai berikut. CO2 ( g) + H2O( l ) <-->H2CO3 ( aq) <--> HCO3– ( aq) + H+ ( aq) Berdasarkan reaksi tersebut, apa yang terjadi jika seseorang mengalami alkalosis?
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4.
OPEN ENDED QUESTION
10 mins • 20 pts
Consider the following chemical reaction:
2 NO₂ (g) ⇌ N₂O₄ (g)
If the reaction mixture is initially at equilibrium at a certain temperature and pressure, and the volume of the container is suddenly decreased, what will happen to the concentrations of NO₂ and N₂O₄ at equilibrium? Explain your reasoning using Le Chatelier's Principle and any relevant calculations, if necessary.
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5.
OPEN ENDED QUESTION
10 mins • 20 pts
Sebuah reaksi kimia, X + Y ⇌ 2Z, memiliki konstanta kesetimbangan Kc sebesar 0,50 pada suhu tertentu. Jika awalnya terdapat 0,10 mol X dan 0,20 mol Y dalam sebuah wadah berukuran 1 liter, dan reaksi berlangsung hingga mencapai kesetimbangan, berapa jumlah mol Z yang akan terbentuk pada kesetimbangan? Jelaskan bagaimana kamu mendapatkan jawabanmu.
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6.
OPEN ENDED QUESTION
10 mins • 1 pt
Tuliskan persamaan tetapan kesetimbangan berdasarkan konsentrasi ( K c ) untuk reaksi berikut!
a. 2NaHCO3 (s) <-> Na2CO3 (s) + CO2 (g) + H2O(g)
b. NH3 (g) + H2O(l) <-> NH4 + (aq) + OH– (aq)
c. BiCl3 (aq) + H2O(l) <-> BiOCl(s) + 2HCl(aq)
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7.
OPEN ENDED QUESTION
15 mins • 1 pt
Dalam wadah tertutup bervolume 1 L, sebanyak 0,01 mol PCl 5 terurai sesuai reaksi berikut. PCl5 (g) <--> PCl3 (g) + Cl2 (g) Jika saat setimbang jumlah mol masing-masing komponen sebanyak 0,005 mol, tentukan:
a. harga Kc reaksi tersebut!
b. persentase PCl5 yang terurai!
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