1. Hasil kali kelarutan L(OH)3 = 2,7 x 10-11, maka pH larutan L(OH)3 adalah...
(Sumber: Nurchasanah, dkk., 2007)
Ksp Hasil Kali Kelarutan
Quiz
•
Chemistry
•
11th Grade
•
Hard
Penggerak Tri Kurnia
FREE Resource
8 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
1. Hasil kali kelarutan L(OH)3 = 2,7 x 10-11, maka pH larutan L(OH)3 adalah...
(Sumber: Nurchasanah, dkk., 2007)
a. 2 – log 3
b. 3 – log 2
c. 5 + log 3
d. 11 + log 3
e. 13 + log 2
Answer explanation
The correct answer is d. To find the pH of L(OH)3, use the formula pH = 14 + log(Kw/Ksp). Given Kw = 1.0 x 10^-14 and Ksp = 2.7 x 10^-11, pH = 14 + log(1.0 x 10^-14 / 2.7 x 10^-11) = 11 + log(3). Therefore, the pH is 11 + log 3.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
3. Mg(OH)2 dalam larutan memiliki pH = 12, jika diketahui Ksp Mg(OH)2 = 1,5 x 10-11, maka kelarutannya adalah....
JAWAB :
(Sumber: sitti kalsum, dkk., 2007
a. 3 x 10-7
b. 3 x 10-6
c. 1,5 x 10-7
d. 1,5 x 10-6
e. 1,5 x 10-5
Answer explanation
The correct choice is 1,5 x 10^-7 because the given pH value of 12 indicates a hydroxide concentration of 1 x 10^-12 M, leading to a solubility of 1,5 x 10^-7 M for Mg(OH)2.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
4.Ksp larutan jenuh Zn(OH)2 yang memiliki pH = 9 adalah.......
(Sumber: sitti kalsum, dkk., 2007)
a. 5 x 10-16
b. 10 x 10-16
c. 10 x 10-15
d. 15x 10-16
e. 15 x 10-15
Answer explanation
The correct answer is a. 5 x 10^-16 because at pH 9, Zn(OH)2 is sparingly soluble and the Ksp value is 5 x 10^-16.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
5.Perhatikan tabel Ksp senyawa karbonat dengan ion pembentuknya:
Berdasarkan data tersebut, endapan yang akan terbentuk jika ion (+) dan ion (-)
direaksikan adalah....
(Sumber: Yayan Sunarya, 2009)
a. MgCO3
b. SrCO3
c. BaCO3
d.CaCO3
e. FeCO3
Answer explanation
FeCO3 is the correct choice based on the solubility product constants. FeCO3 has the lowest Ksp value among the options, indicating it will form a precipitate.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
6. Di dalam suatu larutan terdapat ion Ca2+, Sr2+, BCa2+, dan Pb2+ dengan molaritas yang sama. Jika larutan itu ditetesi dengan larutan Na2SO4, maka zat yang mula-mula mengendap adalah....
(Sumber: Fajar Partana, 2009)
a. CaSO4 (Ksp = 2,4 x 10-10)
b. PbSO4 (Ksp = 1,7 x 10-8)
c. SrSO4 (Ksp = 2,5 x 10-7)
d. BaSO4 (Ksp = 1,1 x 10-10)
e. Mengendap bersama-sama
Answer explanation
The correct choice is d. BaSO4 because it has the lowest Ksp value, indicating it will precipitate first when reacted with Na2SO4.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
7. Sebanyak 200 mL larutan AgNO3 1,3 x 10-3 M dicampurkan dengan 100 mL larutan Na2S 4,5 x 10-5 M. Maka Qc yang diperoleh adalah ….. (Ksp Ag2S = 1,6 x 10-49 mol3/L3)
(Sumber: Nurchasanah, dkk., 2007)
a. Qc < Ksp , maka tidak terbentuk endapan
b. Qc = Ksp, maka terbentuk endapan
c. Qc > Ksp, maka tidak terbentuk endapan
d. Qc < Ksp, maka terbentuk endapan
e. Qc > Ksp, maka terbentuk endapan
Answer explanation
The correct choice is a. Since Qc < Ksp, no precipitate will form.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
8.Suatu larutan mengandung garam-garam Pb(NO3)2 , Mn(NO3)2 , Zn(NO3)2 , masing-msing dengan konsentrasi 0,01M .pada larutan ini dilarutkan sejumlah NaOH padat hingga laruta menjadi 8. Berdasarkan data Ksp berikut
Pb(OH)2 = 2,8 X 10-16
Mn(OH)2 = 4,5 X 10-14
Zn(OH)2 = 4,5 X 10-17
Hidroksida yang mengendap adalah...
a. Tidak ada
(Sumber : Setot Budi Raharjo, 2014)
b. Ketiga-tiganya
c. Hanya Zn(OH)2
d. Hanya Mn(OH)2
e. Zn(OH)2 dan Pb(OH)2
Answer explanation
The precipitated hydroxides are Zn(OH)2 and Pb(OH)2 based on their Ksp values being exceeded by the addition of NaOH.
8.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
1.Hasil kali kelarutan Mg(OH)2 = 3,2 x 10-11, maka pH larutan Mg(OH)2 adalah....
(Sumber:Nurchasanah,dkk.,2007)
a. 4 – log 4
b. 4 + log 4
c. 10
d. 10 + log 4
e. 10 – log 4
Answer explanation
The correct choice is d. 10 + log 4 because the pH of a solution can be calculated using the formula pH = -log[H+]. In this case, the concentration of Mg(OH)2 is given, allowing us to calculate the pH using the formula.
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