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20 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
konsentrasi larutan : berapa gram 25% natrium hidroksida yang harus disiapkan untuk membuat 60 gram larutan natrium hidroksida?
10,0 gram
15,0 gram
20,0 gram
25,0 gram
30,0 gram
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
part per million : Dalam 100 kg air laut terdapat 0,0001 gram raksa. kandungan raksa dalam air tersebut adalah
0,0001 bpj
0,0010 bpj
0,1000 bpj
1,0000 bpj
10,000 bpj
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
pembuatan larutan : berapa molaritas (M) dari larutan yang mengandung 4 gram NaOH (mr = 40) di dalam 250 mL larutan?
1
0,2
0,4
0,6
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
pembuatan larutan : hitung M dari H2So4 di dalam larutan yang dibuat dengan asam sulfat p.a (p=2,5 g/ml; %=98%; mr = 98) menjadi asam sulfat dengan konsentrasi 0,1 M sebanyak 500 mL
2 ml
1 ml
0,5 ml
0,2 ml
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
pengenceran : bila dalam 1 ml H2So4 2M ditambahkan air sehingga memperoleh 100 ml larutan, maka konsentrasi larutan
0,002 M
0,020 M
0,200 M
2,000 M
20,00 M
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
volume alkalimetri : Sediaan injeksi dengan kandungan magnesium sulfat ditetapkan kadarnya oleh bagian pengawasan mutu secara titrasi. pada prosedur tertulis " pipet sejumlah volume injeksi setara dengan lebih kurang 250 mg magnesium sulfat anhidrat pada label bertuliskan injeksi magnesium sulfat 20%. berapakah volume (mL) injeksi yang dibutuhkan?
0,08
1,25
5,00
8,00
12,50
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Bagian QC farmasi melakukan penetapan kadar bahan baku dikumarol menggunakan metode titrasi. Sejumlah 400 mg sampel dilarutkan dalam n-butilamina hingga 50,0 mL, dan ditambahkan 3 tetes azo violet dalam metanol, kemudian dititrasi dengan natrium metoksida 0,1 N menggunakan buret 50,0 mL (triplo). Setiap mL titran setara dengan 16,81 mg dikumarol. End point tercapai pada 23,3 mL; 23,4 mL; 23,0 mL. berapa mL kandunggan dikumarol dalam sampel?
385,63
390,55
391,67
395,35
400,00
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