Question

Mohon bantuannyaa kakk

Answer 1

Mapel : Kimia

Kelas : 11

Materi : Kesetimbangan Ion Dalam Larutan

Kata Kunci : Ion Senama, pH

Penyelesaian

26.

s Mg(OH)2 = 5×10-²

s = M

Mg(OH)2 → Mg²+ + 2OH-

Valensi basa = 2

[OH-] = 2×5×10-²

[OH-] = 10-³

pOH = -log[OH-]

pOH = -log10-³

pOH = 3

pH = pkw - pOH

pH = 14-3

pH = 11

27. misalkan kelarutan Mg(OH)2 dalam NaOH = s

Ksp Mg(OH)2 = 1,8×10-¹¹

NaOH = 0,1M

NaOH → Na+ + OH-

0,1 → 0,1 + 0,1

[OH-] = 0,1M

Mg(OH)2 → Mg²+ + 2OH

ksp = s + 2s

1,8×10-¹¹ = s (0,1)²

1,8×10-¹¹ = s 10-²

s = 1,8×10-¹¹/10-²

s = 1,8×10^-9 mol/L

Answer 2

Mapel : Kimia

Kelas : 11

Materi : Kesetimbangan Ion Dalam Larutan

Kata Kunci : Ion Senama, pH

Penyelesaian

26.

s Mg(OH)2 = 5×10-²

s = M

Mg(OH)2 → Mg²+ + 2OH-

Valensi basa = 2

[OH-] = 2×5×10-²

[OH-] = 10-³

pOH = -log[OH-]

pOH = -log10-³

pOH = 3

pH = pkw - pOH

pH = 14-3

pH = 11

27. misalkan kelarutan Mg(OH)2 dalam NaOH = s

Ksp Mg(OH)2 = 1,8×10-¹¹

NaOH = 0,1M

NaOH → Na+ + OH-

0,1 → 0,1 + 0,1

[OH-] = 0,1M

Mg(OH)2 → Mg²+ + 2OH

ksp = s + 2s

1,8×10-¹¹ = s (0,1)²

1,8×10-¹¹ = s 10-²

s = 1,8×10-¹¹/10-²

s = 1,8×10^-9 mol/L