Question

Please jawab nomor yg dilingkari..Pakai cara yah..
Trimakasih.☺

Answer 1

13. Ag3PO4 => 3Ag⁺  +  PO4³⁻
           a              3a          a
Ksp Ag3PO4 = [Ag⁺] [PO4³⁻]
Ksp Ag3PO4 = [3a]³ [a]
Ksp Ag3PO4 = 27a⁴  => jawabannya (A)

14 Kalau di uraikan satu persatu terlalu banyak, semua mempunyai rumus yang sama
s = √ Ksp
1.s = 1,4 x10⁻⁵
2. s = 1,34 x10⁻⁴
3. s = 5,29 x10⁻⁵
4. s = 1 x10⁻⁵
urutan dari yg kecil = 4,1,3,2 => jawabannya (E)

15. Ksp PbSO4 = s² = (1,4x10⁻⁴)² = 1,96 x10⁻⁸
Ksp PbSO4 = [Pb²⁺] [SO4²⁻]
1,96 x10⁻⁸ = [s] [0,05]
s = 3,92 x10⁻⁷ M = 0,4 x10⁻⁶ => jawabannya (C)

16. pH M(OH)3 = 9
pOH = 14 - 9 = 5
[OH-] = 10⁻⁵
M(OH)3 => M³⁺  +  3OH⁻
Ksp M(OH)3 = [M³⁺] [OH⁻]³
Ksp M(OH)3 = [1/3 x 10⁻⁵] [10⁻⁵]³
Ksp M(OH)3 = 3,3 x10⁻²¹  => jawabannya (A)