windisukma
Pakai konsep hidrolisis, itu kan basa kuat dicampur sama asam lemah, jadi ntar didapat konsentrasi OH nya, sebelum itu cari dulu konsentrasi garamnya [G] = mol / volume total = 1,8 x 100/ 200 = 9 x 10^-1 masukkan ke rumus hidrolisis [OH-] = akar Kw x [G]/ Ka = akar 10^-14 × 9 × 10^-1/10^-5 =3 × 10^-5 Mg(OH)2 ----> Mg2+ + 2OH- 9 × 10-12 = Mg2+ × 9 × 10^-10 Mg2+ = 10^-2 M B
[G] = mol / volume total = 1,8 x 100/ 200 = 9 x 10^-1
masukkan ke rumus hidrolisis
[OH-] = akar Kw x [G]/ Ka
= akar 10^-14 × 9 × 10^-1/10^-5
=3 × 10^-5
Mg(OH)2 ----> Mg2+ + 2OH-
9 × 10-12 = Mg2+ × 9 × 10^-10
Mg2+ = 10^-2 M
B