Ulangan Harian 3 Kimia Kelas XII MIPA
Quiz
•
Chemistry
•
12th Grade
•
Practice Problem
•
Easy
Felix Alexander Simorangkir
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10 questions
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1.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Elektrolisis larutan NaCl akan menghasilkan.....
H2 , Cl2, Na dan larutan NaOH
H2, Cl2, dan Na
H2 dan Cl2
Na dan Cl2
H2, Cl2, dan larutan NaOH
2.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Elektrolisis 2 Liter larutan NaCl 0,2 M berlangsung menurut reaksi tersebut, Jika muatan listrik sebesar 0,02 Faraday dialirkan dalam larutan tersebut, maka nilai pH larutan setelah elektrolisis adalah.....
1
2
7
12
13
3.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Elektrolisis larutan NaCl menghasilkan 6,72 Liter gas klor pada keadaan STP. Jika jumlah muatan listrik yang sama digunakan untuk mengelektrolisis larutan Emas (III) klorida, maka jumlah logam emas (Ar 197) yang dihasilkan adalah..... gram
39,4
59,1
76,8
118,2
177,3
4.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Reaksi yang terjadi di "Y" adalah.....
2H2O ---> 4H^+ + O2 + 4e
Ni^2+ + 2e ---> Ni
Ni ---> Ni^2+ + 2e
Ag ---> Ag^+ + e
Ag^+ + e ---> Ag
5.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Sebanyak 1 Liter larutan CrCl3 1,0 M dielektrolisis dengan arus 6,00 A. Waktu yang diperlukan untuk mengendapkan semua logam kromium (Ar Cr = 52 ; 1F = 96500 C/mol)
96500
48250
32167
16083
9650
6.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Elektrolisis larutan ZnSO4 menghasilkan 16,25 gram logam Zn(Ar Zn = 65). Bila arus yang sama digunakan untuk mengelektrolisis larutan NiSO4 (Ar Ni = 59), maka massa logam Ni yang diperoleh..... gram
4,51
14,75
17,90
23,03
32,50
7.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Pelapisan kromium dilakukan secara elektrolisis pada sebuah objek dalam larutan dikromat sesuai persamaan reaksi berikut ini, lama waktu yang dibutuhkan untuk melapiskan kromium setebal 0,02 mm pada permukaan bemper mobil seluas 0,25 m^2 dengan arus 75 A adalah..... jam ( densitas kromium = 7,19 gr/cm^3)
3
2,5
2,2
1,5
0,25
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