
pretest koef
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University
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Kesekretariatan UNSRI
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10 questions
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1.
MULTIPLE CHOICE QUESTION
10 sec • 1 pt
Bentuk tak terion obat as salisilat pada saat ekstraksi akan terekstraksikan ke..
Fase Organik
Fase Air
Fase Gas
Fase terion
2.
MULTIPLE CHOICE QUESTION
10 sec • 1 pt
Zat yang pengekstraksi pada percobaan ini adalah...
Kloroform
Etil asetat
N-hexane
HCl
3.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
berapa gr NaOH yg dibutuhkan pada pembuatan NaOH 0,01 N sebanyak 50 ml? (Mr NaOH=40)
0,01 gr
0,02 gr
0,03 gr
0,04 gr
4.
MULTIPLE CHOICE QUESTION
10 sec • 1 pt
dibawah ini pernyataan yang benar, kecuali...
Semakin rendah nilai pKa obat bersifat asam, semakin kuat keasamannya, proporsi bentuk terionisasi lebih besar pada pH tertentu.
Praktikum Koefisien partisi obat bertujuan untuk menentukan seberapa baik partisi senyawa diantara fase organik dan fase air
Kelarutan lemak suatu obat ditentukan dari nilai koefisien partisi (PC) minyak/air
Bentuk garam dari as salisilat kurang larut air, sedangkan asam salisilat lebih larut dalam fase larutan.
5.
MULTIPLE CHOICE QUESTION
10 sec • 1 pt
Rumus Molekul asam salisilat...
C7H6O5
C₉H₈O₄
C8H7O5
C7H6O3
6.
MULTIPLE CHOICE QUESTION
10 sec • 1 pt
reaksi yg terjadi pada titrasi asam salisilat dengan naoh pada praktikum ini : C₇H₆O₃ (asam salisilat) + NaOH → C₇H₅O₃Na (natrium salisilat) + H₂O
Benar
Salah
7.
MULTIPLE CHOICE QUESTION
10 sec • 1 pt
berikut metode yg bisa digunakan untuk penentuan koefisien partisi & konstanta disosiasi yaitu...
Spektrofotometri
Gravimetri
titrasi
semua benar
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