Jawabanmu

2014-06-14T20:00:08+07:00
MgCl₂ + NaOH ------> Mg(OH)₂ + NaCl
ksp Mg(OH)₂ = 2x10⁻¹¹

MgCl₂ -------> Mg²⁺ + 2Cl⁻
 2x10⁻³        2x10⁻³    4x10⁻³

Mg(OH)₂ <-----> Mg²⁺ + 2OH⁻

Ksp = [Mg²⁺] [OH⁻]²
2x10⁻¹¹ = 2x10⁻³ [OH⁻]²
[OH⁻]² =  \frac{2x10^-11}{2x10^-3}
[OH⁻] =  \sqrt{10^-8}
[OH⁻] = 10⁻⁴

pOH = -log[OH⁻]
pOH = -log[1x10⁻⁴]
pOH = 4

pH = 14 - pOH
pH = 14 - 4
pH = 4
14-4=10, ka.. hehee
makasiih yaa kakaa :))
maksudnya 10. hehhe:)
okeee.. syiipp :))