Question

Tolong bantu 26-31 pakai cara no spam

Answer 1

26. Lihat Ksp terbesar --> C (3)
27. M = massa/Mr x 1000/V
M = 45 x 10^-3/225 x 1000/500
M = 4 x 10^-4

Ksp BaC2O4 = s² = (4x10^-4)² = 1,6 x 10^-7 mol/L (C)

28. Ksp Ag2CO3 = 4 x 10^-12
4s³ = 4 x 10^-12
s = 10^-4 M

M = massa/Mr x 1000/V
10^-4 = massa/276 x 1000/1000
massa = 27.6 mg (D)

29. CaCl2 ⇔ Ca2+ + 2Cl-
       0,2            0,2        0,4
PbCl2 ⇔ Pb2+ + 2Cl-
    s              s          0,4
Ksp PbCl2 = [s] [0,4]²
1.6 x 10^-5 = s x 0,16
s = 1.10^-4 M (E)

30. Ksp L(OH)2 = 3,2 x 10^-8
4s³ = 3,2 x 10^-8
s³ = 8 x 10^-9
s = 2 x 10^-3
OH- = 2 x 2 x 10^-3
OH- = 4 x 10^-3
pOH = 3 - log 4
pH = 11 + log 4 (D)

31. pH = 8
pOH = 6
OH- = 10^-6
s = 1/3 x 10^-6
Ksp X(OH)3 = 27s^4 = 27(1/3 x 10^-6)^4 = 1/3 x 10^-24 = 3.3 x 10^-25 (A)

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