
Latihan SBMPTN 6
Authored by Hendriyanto Wardoyo
Chemistry
12th Grade
Used 117+ times

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15 questions
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1.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Unsur A dan B dapat membentuk dua macam senyawa. Kandungan massa unsur B dalam senyawa I dan senyawa II masing-masing sebesar 25% dan 75%. Maka perbandingan massa unsur A dalam senyawa II terhadap senyawa I adalah
1 : 2
1 : 3
1 : 9
3 : 1
9 : 1
2.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Sebanyak 270 kg logam besi dihasilkan ketika 480 kg bijih hematit, Fe2O3, direduksi dengan gas H2 dalam tanur. Persentase rendemen besi yang dihasilkan sebesar… (Mr Fe2O3 = 159,7 g/mol)
Fe2O3 + 3H2 --> 2Fe + 3H2O
80,20%
70,05%
57,85%
31,56%
29,21%
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Suatu senyawa alkohol X dioksidasi akan terbentuk aldehida. Jika sebanyak 6 gram senyawa aldehida tersebut dilarutkan ke dalam 100 gram air (Kf=1,86) maka titik beku larutan menjadi -3,72oC. Senyawa X tersebut adalah
2-Propanol
Etanol
1-Propanol
Metanol
1-Butanol
4.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Berapa mol NaF yang harus dilarutkan ke dalam 1,0 liter jenuh PbF2 pada 25oC agar konsentrasi ion Pb2+ dalam larutan menjadi 1 x 10-6 molar? (KSP PbF2 pada 25oC = 4,0 x 10-8)
0,02 mol
0,04 mol
0,10 mol
0,20 mol
0,40 mol
5.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Dalam waktu 6,2 jam, 50 gram sampel Ag-112 meluruh sebanyak 87,5% dari berat semula. Nilai waktu paruh untuk radioaktif tersebut sebesar
1,65 jam
2,07 jam
2,51 jam
3,10 jam
4,32 jam
6.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Sejumlah larutan HCl 0,2 M dicampurkan dengan larutan NH3 0,3 M (Kb = 10-5). Campuran ini mempunyai pH = 9 + log 2, maka perbandingan volum HCl dengan volum NH3 sebelum dicampurkan adalah
3 : 4
4 : 3
2 : 3
1 : 2
2 : 1
7.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Logam M elektron valensinya mempunyai bilangan kuantum n=3, l=0, m=0, dan s = -1/2. Jika 0,17 gram logam M dimasukkan ke dalam air, maka terbentuk 112 mL gas H2 pada keadaan standar. Jumlah proton, elektron dan neutron yang terdapat dalam tiap atom logam M adalah
11, 11, 12
11, 11, 21
12, 12, 20
12, 12, 22
12, 12, 34
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