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Quiz HOTS: pH Penyangga dan Hidrolisis

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Pohon soal pH buffer dan hidrolisis

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Quiz HOTS: pH Penyangga dan Hidrolisis
 

Quiz HOTS: pH Penyangga dan HidrolisisOnline version

Pohon soal pH buffer dan hidrolisis

by Nur Afiati
1

Jika pH penyangga sama dengan pKa, rasio A−/HA berapa? pKa = 4,75.

2

Daftar dampak pengenceran terhadap pH penyangga yang mengikuti HH?

3

Larutan NH4Cl 0,10 M di air: pH cenderung apa?

4

Garam OAc− (sabun natrium asetat) di air: apa jenis hidrolisisnya?

5

Tuliskan persamaan hidrolysis NH4+ dalam air.

6

Garam NH4OAc 0,1 M larut: pH mendekati netral? Jelaskan.

7

Hidrolisis garam NH4ClO4 (NH4+ + ClO4−): jenis pH yang dihasilkan?

8

Garam dari basa kuat dan asam lemah (misal NaOAc) bersifat apa?

9

Dalam sebuah buffer, kenaikan kecil asam kuat akan menyebabkan apa pada pH menurut HH?

10

LOTS: Larutan penyangga asam asetat 0,1 M dan natrium asetat 0,1 M. pKa asetat = 4,76. pH berapa menurut HH?

11

LOTS: Jika rasio [A-]/[HA] = 0,5, pKa=4,75. pH penyangga = ?

12

LOTS: Penambahan 0,01 M HCl ke penyangga 0,1 M HA dan A- tidak signifikan. pH naik/turun sedikit?

13

LOTS: Dalam buffer, jika [A-]/[HA] dua kali lipat, pH naik menyesuaikan berapa? (pKa=4,75)

14

LOTS: Buffer asetat-pH 4,76 saat ditambah basa kuat akan...

15

MOTS: Suatu larutan buffer asam kuat/lemah: mana yang benar?

16

MOTS: Rumus Henderson-Hasselbalch digunakan untuk menentukan pH buffer yang mengandung asam lemah dan basa konjugatnya. Benar?

17

MOTS: Hitung pH buffer jika pKa = 4,9 dan rasio A-/HA = 2:1. Pilih jawaban yang benar.

18

MOTS: Jika buffer asetat dibuat dengan HA 0,05 M dan A- 0,1 M, pH menurut HH?

19

MOTS: Uji konsep: penambahan asam kuat ke buffer akan membuat pH...?

20

HOTS: Jelaskan mengapa buffer penyangga lemah jika pKa tidak mendekati pH sampel?

21

HOTS: Beri contoh perhitungan kapan larutan garam dari asam lemah dan basa kuat menghasilkan pH lebih dari 7.

22

HOTS: Jelaskan bagaimana pH larutan garam hasil hidrolisis garam asam lemah-basa kuat berbeda dengan garam basa lemah-asam kuat.

23

HOTS: Suatu garam dari asam weak dan basa weak bisa menimbulkan pH netral jika Kaasam=Kbbase. Benar?

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