
BUFFER QUIZ!
Authored by Siti Nurhasanah
Chemistry
11th Grade
Used 3+ times

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11 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Yang merupakan larutan penyangga adalah ….
CH3COOH/CHOOH
CHOO–/CH3COO–
HCl/Cl–
HOCl/OCl–
Answer explanation
masih inget kan? penyangga itu cuma boleh lemah + konjugasinya, HOCl adalah asam lemah dengan OCl- merupakan konjugasinya. beda dengan HCl yang merupakan asam kuat, guys.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Pada penambahan sedikit basa pada larutan penyangga HOCl/OCl– menyebabkan ….
[HOCl] berkurang
[OCl–]tetap
pH sistem tetap
[HOCl]/ [OCl–] bertambah
Answer explanation
INGET lagi yaaa fungsi buffer ya emang buat jagain nilai pH kann?
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Campuran larutan di bawah ini yang dapat membentuk campuran penyangga adalah ….
larutan HCl dengan larutan NH4Cl
larutan HCOOH dengan larutan HCOONa
larutan Ca(OH)2 dengan larutan CaCl2
larutan CH3COOH dengan larutan C6H5COOK
Answer explanation
JANGAN ketuker, itu asam format (lemah) dengam garamya natrim format. Kalau option yang lain salah karena kuat + garamnya, atau emang nggak nyambung sama sekali. Paham kann?
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Pasangan larutan berikut ini yang menghasilkan larutan penyangga adalah ….
100 mL NH4OH 0,2 M + 100 mL HCl 0,1 M
100 mL NH4OH 0,2 M + 100 mL HCl 0,3 M
100 mL NaOH 0,2 M + 100 mL CH3COOH 0,2 M
100 mL NaOH 0,2 M + 100 mL HCN 0,1 M
Answer explanation
INGET, si lemah adalah pemeran utama kan? makanya si lemah harus lebih BA.... nyak!
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Ke dalam 1 liter larutan asam asetat 0,1 M yang pH-nya = 3 ditambahkan garam natrium asetat supaya pH-nya menjadi 2 kali semula. Ka asam asetat = 1 x 10-5. Garam natrium asetat yang ditambahkan itu sebanyak…
1 mol
0,1 mol
0,01 mol
0,001mol
Answer explanation
BISA KAN?HEHE
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Sebanyak 50 mL larutan CH3COOH 0,2 M dicampurkan dengan 50 mL larutan CH3COONa sehingga diperoleh larutan buffer dengan pH = 4. Untuk membuat larutan buffer tersebut diperlukan konsentrasi CH3COONa sebesar…(Ka CH3COOH = 1 x 10-5)
0,01 M
0,02 M
0,1 M
0,2 M
Answer explanation
BISA DOOONG
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Harga pH campuran antara 100 ml larutan C6H5COOH 0,2 M dengan 100 ml larutan NaOH 0,1 M jika diketahui Ka C6H5COOH = 6 x 10-5..
5 + log 6
5 - log 6
4 - log 6
6 - log 5
Answer explanation
gambar yang saya share ini pake cara riweuh, coba kalo pake cara yang nggak riweuh kaya yang kemarin saya ajarin? easy banget kan?
tinggal
H+ = 6 x 10-5 x [(20 - 10)/10]
H+ = 6 x 10-5 x [10/10]
H+ = 6 x 10-5 x 1
pH = 5 - log 6
DONE!
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