Worksheet ini berisi teori hidrolisis garam, cara penurunan rumus hidrolisis dan latihan soal. silahkan dipergunakan.

1. S E K O L A H M E N E N G A H A T A S B R A W I J A Y A S M A R T S C H O O L
T e r a k r e d i t a s i “ A ”
NSS : 302056104029/ SK : 421.8/1552/35.73.307/2008
JL. Cipayung No. 10 Malang Telp. (0341) 584 654 kode pos : 65145
Homepage: www.smabss.ub.ac.id email: smabss@ub.ac.id
SALT HYDROLYSIS
A. Definition of Salt Hydrolysis
1. Pre Knowledge:
No Question Answer
1 What is a salt?
2 Mention kinds of salt!
3 Explain how to make a salt!
2. Properties of salt
To understanding the properties of salt, do this experiment!
Title: Understanding properties of salt
Purpose: explain properties of salt
Material/apparatus!
Procedure:
1. Drop the solution of each salt to palette about 3 drops
2. Test by litmus and observe the color change of litmus
3. Measure the pH of salt solution by universal indicator
Observation result
Question
Complete the following table
By Mr. Dasianto. dasianto@yahoo.co.id

2. Conclusion
3. Hydrolysis Reaction
Hydrolysis reaction is reaction that able to break down O – H bonding in water molecule. Not all salt able to break down this
bonding. Complete the following table
NO Salt Parent base Parent acid Hydrolysis Reaction
1 NaCl NaOH/Strong base HCl/strong acid
NaCl  Na+
+ Cl-
Na+
+ H2O 
Cl -
+ H2O 
Not hydrolysis
2
K2SO4 ……………….. ……………
3 NH4Cl NH3/weak base HCl/strong acid
NH4Cl  NH4
+
+ Cl-
NH4
+
+ H2O  NH4OH + H+
Cl-
+ H2O 
Partially hydrolysis
4 BeSO4 ……………….. ……………
5 NaCN NaOH/strong base HCN/weak acid
NaCN  Na+
+ CN-
Na+
+ H2O 
CN -
+ H2O  HCN + OH-
Partially hydrolysis
6 CH3COOK ……………….. ……………
7 NH4CN NH3/weak base HCN/weak acid
NH4CN  NH4
+
+ CN-
NH4
+
+ H2O  NH4OH + H+
CN -
+ H2O  HCN + OH-
Totally hydrolysis
8 HCOONH4 ……………….. ……………
Exercise
Identify properties of this salts and write the hydrolysis reaction of each salt
No Salt Properties Hydrolysis reaction
1 KNO3
2 AlCl3
3 Mg(CN)2
4 K2C2O4
5 NaF
B. pH Calculation of Salt

3. To calculate pH of salt solution, we are need [OH-
] or [H+
]

7. Exercise
No Question Answer
1 Calculate pH of:
a. 100 mL NaF 0,1 M (Ka = 10-5
)
b. 100 mL NH4Cl 0,1 M (Kb = 10-5
)
c. 100 ml (NH4)2SO4 0,05 M (Kb = 10-5
)
d. 100 mL BaF2 0,05 M (Ka 10-5
)
2 Calculate pH of:
a. 100 mL NaOH 0,1 M mix with 100 mL HCN 0,1 M
(Ka = 10-5
)
b. 200 mL HCN 0,1 M mix with 100 mL Ba(OH)2 0,1 M
(Ka = 10-5
)
Evaluation
1. The correct statement is ….
a. CaS not hydrolyzed in water
b. K2SO4 partial hydrolyzed in water
c. Mg(HCOO)2 total hydrolyzed in water
d. (NH4)2S partial hydrolyzed in water
e. NH4CN not hydrolyzed in water
2. The following mixture can be hydrolyzed in water, except
..
a. 100 mL HCl 0,1 M with 50 mL NaOH 0,2 M
b. 100 mL HBr 0,1M with 100 NH4OH 0,1 M
c. 10 mL HCN 0,5 M with 50 mL KOH 0,1 M
d. 10 mL NH4OH 0,5 M with 10 mL HCl 0,1 M
e. 10 mL CH3COOH 1 M with 100 mL NaOH 0,1 M
3. Larutan garam yang dapat mengubah warna kertas
lakmus merah menjadi biru adalah….
a. NH4CN c. BaCl2 e. NaNO3

8. b. KF d. (NH4)2SO4
4. The solution that have highest pH is….
a. NH4NO3 0,1M d. CH3COOK 0,1M
b. KCl 0,1M e. NH4Cl 0,1M
c. K2SO4 0,1M
5. The pH value of 100 mL (CH3COO)2Ca0,1 M.(Ka
CH3COOH=10-5
) is ….
a. 5 c. 9 +log √2 e. 5 – log √5
b. 9 +log √5 d. 9
6. Hydrolysis constant (Kh) from 100 mL of NH4Br 0,1 M
is….(Kb= 10-5
)
a. 10-8
c. 10-9
e. 2 x 10-9
d. 10-5
d. 2 x 10-5
7. A student dissolve 50 mL NaOH 0,2 M into 10 mL
CH3COOH 1 M. (Ka CH3COOH=10-5
). The pH of mixture
after is added 40 mL water is….
a. 10 c. 8,5 e. 9,5
b. 8 d. 9
8. Mass of sodium acetate, CH3COONa must be added into
10 mL of water to give pH = 9 is .... (Ka = 10-5
, Ar Al=26,
Cl=35,5)
a. 8,20 g c. 4,10 g e. 2,05 g
b. 0,082 g d. 0,041 g
9. Diberikan data beberapa larutan garam berikut:
1). NaF 0,1 M 4). NH4Cl 0,1 M
2). K2SO4 0,1 M 5). Ca(CH3COO)2 0,1 M
3). (NH4)CO3 0,1 M 6). (NH4)2SO4 0,1 M
Larutan garam yang dapat mengubah warna kertas
lakmus merah menjadi biru adalah…
a. 1 dan 3 c. 4 dan 5 e. 1 dan 5
b. 4 dan 6 d. 2 dan 4
10. Berdasarkan data pada soal nomor 9, garam yang
mengalami hidrolisis sebagian adalah…
a. 1, 2 dan 3 c. 3, 4 dan 5 e. 1, 4 dan 5
b. 3, 5 dan 6 d. 2, 4 dan 5
11. Campuran berikut yang dapat mengalami hidrolisis
sebagian dan memiliki pH > 7 adalah…
a. 100 mL HCl 0,1 M + 100 mL NH3 0,1 M
b. 200 mL NH3 0,2 M + 200 mL HF 0,2 M
c. 100 mL HF 0,2 M + 200 mL NaOH 0,2 M
d. 50 mL H2SO4 0,2 M + 100 mL KOH 0,1 M
e. 50 mL Ba(OH)2 0,2 M + 50 mL H2SO4 0,2 M
12. Sebanyak 100 mL NH4Cl 0,1 M (Kb = 10-5
) memiliki pH
sebesar…
a. 4 c. 7 e. 10
b. 5 d. 9
13. Sebanyak 250 mL Ba(CH3COO)2 0,1 M (Ka = 2 x 10-5
)
memiliki pH sebesar…
a. 5,5 – log √5 c. 7 e. 9
b. 5 d. 8,5 + log√5
14. 100 mL NH3 0,1 M memiliki pH = 11. Maka pH larutan
100 mL NH4Cl 0,1 M adalah…
a. 3 c. 7 e. 11
b. 5 d. 9
15. 150 mL of acetic acid (CH3COOH) 0,2 M (Ka = 10-5
) react
with 150 mL of potassium hydroxide (KOH) 0,2 M. pH of
this mixture is…
a. 5 c. 7 e. 9
b. 6-log 7 d. 8 + log 7
16. Hydrolysis equation for NH4Cl salt is….
a. NH4
+
+ H2O NH4OH + H+
Cl-
+ H2O HCl + OH-
b. NH4
+
+ H2O
Cl-
+ H2O HCl + OH-
c. NH4
+
+ H2O
Cl-
+ H2O
d. NH4
+
+ H2O NH4OH + H+
Cl-
+ H2O
e. NH4
+
+ H2O NH4OH + H+
2Cl-
Cl2
17. Mass of ammonium sulfate, (NH4)2SO4, must be added
into 100 mL of water to give pH = 5 is… (Kb = 10-5
, Ar H =
1, N = 14, O = 16, S = 32)
a. 0,33 g c. 1,32 g e. 13,2 g
b. 0,66 g d. 2,64 g
18. Hydrolusis constant (Kh) from 100 mL of NaF 0,1 M is…
(Ka = 4 x 10-7
)
a. 2 x 10-8
c. 5 x 10-5 e.
2,5 x 10-8
b. 2 x 10-8
d. 2,5 x 10-7
19. If each solution has the same volume, which have the
higher pH?
a. CH3COONa 0,1 M d. Na2SO4 0,1 M
b. KCl 0,1 M e. CH3COONH4 0,1 M
c. NH4Cl 0,1 M
20. According to the data in table below, the incorrect
statement is ….
No Kinds Salt
a Not hydrolysis CaCl2
b Not hydrolysis K2SO4
c Partial hydrolysis MgBr2
d Partial hydrolysis (NH4)2S
e Total hydrolysis NH4CN
21. The following mixture that can be hydrolyzed, except ....
a. 100 mL HBr 0,1 M with 50 mL KOH 0,2 M
b. 100 mL HCOOH 0,1M with 50 NH4OH 0,2M
c. 10 mL CH3COOH 0,5 M with 50 mL KOH 0,1 M
d. 10 mL NH4OH 0,5 M with 50 mL HCl 0,1 M
e. 10 mL HCN 1 M with 100 mL NaOH 0,1 M
22. The following salts that have alkaline properties is....
a. MgCl2 d. CH3COOK
b. Na2SO4 e. NH4CN
c. NH4NO3
23. What is the pH of 10 mL (NH4)2SO4 0,1 M, if Kb NH4OH =
2 x 10-5
?
a. 3 b. 5 c. 9 d. 11 e. 13
24. One hundred mililiters of acetic acid , CH3COOH 0,2 M
(Ka=10-5
) react with 100 mL sodium hydroxide, NaOH
0,2M. pH of mixture is ....
a. 3 b. 5 c. 9 d. 11 e. 13
25. Mass of ammonium nitrate, NH4NO3 must be added into
250 mL of water to give pH = 5 is .... (Kb = 2x10-5
, Ar H=1,
N= 14, O=16)
a. 0,4 g c. 10 g e. 1 g
b. 5 g d. 4 g
DAFTAR PUSTAKA
Brady. 2006. General chemistry. London: Longman
Effendy. 2007. A-Level Chemistry 2B. Malang:Bayu Media.
Utami, 2009. KIMIA XI. BSE DEPDIKNAS
Ratcliff, dkk. 2006. CGE PROBLEM: Cambridge press

9. Hariyanto. 2010. Salt Hydrolysis. Worksheet at SMAN 3 Malang.
Arsip Soal Pribadi

10. Hariyanto. 2010. Salt Hydrolysis. Worksheet at SMAN 3 Malang.
Arsip Soal Pribadi