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para master kimia mhon bantuannya? *5?
1. gas H2 akan diperoleh jika larutan asam nitrat akan dicampur dengan
a.air b. logam Mg c. larutan NaOh d. larutan NH4OH e. kalsium karbonat
2. suatu larutan mempunyai pH=5, konsentrasi larutan tersebut jika larutan merupakan basa lemah dengan Kb=10^-5 adalah... M
3. senyawa berikut jika dilarutkan dalam air akan mempunyai pH terkecil
a. HNO3 b. H2CO3 c. H3PO4 d. CH3COOH e.HNO2
4.larutan 200mL H2SO4 0,005 M mempunyai harga pH sebesar
2 Answers
- 8 years agoFavorite Answer
1.
Jawaban : logam Mg
Reaksi:
Mg + 2HNO3 --- > Mg(NO3)2 + H2
2.
pH = 5
pOH = 14-5 = 9
[OH-] = 10^-9
[OH-] = Kb . M
10^-9 = 10^-5 . M
(10^-9)^2 = 10^-5 . M
10^-18 = 10^-5 . M
M = 10^-18 / 10^-5
M = 10^-13 M
3.
Jawaban : HNO3
Alasan : karena HNO3 merupakan asam kuat , semakin kuat suatu asam , maka semakin kecil harga pH
4.
[H+] = 0,005 x 2
[H+] = 0,01
pH = -log [H+]
pH = -log 0,01
pH = 2
Source(s): Semoga Membantu - SI LELAKI XXXLv 58 years ago
2. suatu larutan
mempunyai pH=5,
konsentrasi larutan
tersebut jika larutan
merupakan basa lemah
dengan Kb=10^-5
adalah... M
pH = 5
pOH = 14 - 5
= 9
Oh = Vkb.M
10^-9 = v10^-5.M
10^-18 = 10^-5.m
M = 10^-13
4.larutan 200mL H2SO4
0,005 M mempunyai
harga pH sebesar
H+ = 2. M
H+ = 2. 0,005
h+= 0,01
PH = - LOG 10^-2
PH= 2
