Page 41 - 01 PG Bab 01 Sifat Koligatif.pmd

–
10. Misal: mol e = 1 mol Reaksi sel III
+
–
Reaksi sel I AgNO (aq) → Ag (aq) + NO (aq)
3 3
+
–
NaOH(aq) → Na (aq) + OH (aq) Katode : Ag (aq) + e → Ag(s)
–
+
–
–
Katode : 2H O( ) + 2e → 2OH (aq) + H (g) + –
2 2 Anode : 2H O( ) → 4H (aq) + 4e + O (g)
2 2
–
–
Anode : 4OH (aq) → 2H O( ) + 4e + O (g)
2 2 –
mol O = × mol e = mol
2

–
mol H = × mol e = mol Jadi, perbandingan mol
2
Reaksi sel II = mol H (sel I) : mol Cl (sel II) : mol O (sel III)
2
2
2
–
NaCl(aq) → Na (aq) + Cl (aq)
+
= : : = 2 : 2 : 1
–
–
Katode : 2H O( ) + 2e → 2OH (aq) + H (g)
2 2
–
Anode : 2Cl (aq) → Cl (g) + 2e –
2

–
mol Cl = × mol e = mol
2

40 Ulangan Tengah Semester 1