diketahui 100 mL larutan CH3COONa 0,1 M dan Ka CH3COOH = 1 x 10-5. TENTUKAN: a. reaksi hidrolisis' b. pH larutan!
Kimia
dedekcantika96
Pertanyaan
diketahui 100 mL larutan CH3COONa 0,1 M dan Ka CH3COOH = 1 x 10-5.
TENTUKAN:
a. reaksi hidrolisis'
b. pH larutan!
TENTUKAN:
a. reaksi hidrolisis'
b. pH larutan!
2 Jawaban
-
1. Jawaban dzatinhimmati
CH3COONa _ CH3COO+Na
(H) = akar dari ka dikali M
akar dari 1x 10-5
pH= hasil tadi dimasukan ke rumus ini
= - log (H) -
2. Jawaban cmoeyna
V CH3COONa = 100ml
M CH3COONa = 0,1M
MxV= 0,1 x 0,1 = 0,01 = 1x10^-2
CH3COOH = 1x10^-5
Ka = 10^-5
[H^+] = Ka.mol asam/mol garam
= 10^-5 . 1x10^-5/1x10^-2
= 10^-5 . 1x10^-3
= 1x10^-8
pH = -log . H^+
= -log . 1x10^-8
= 8 -log 1 atw 8
reaksi hidrolisis == CH3COO + Na ----> CH3COONa