Jawabanmu

2014-06-04T19:58:04+07:00
N = m/Mr
n = 5,35/53,5
n = 0,1 mol

M = n/V
M = 0,1/0,25
M = 0,4 M

OH = akar(Kb.M)

Lanjutin yaa Kb nya kok gk diketahui :)

2014-06-04T20:03:05+07:00
N=gram/mr
n=5,35/5.35=1
M=1/250=o,oo4=H+=4x10-3
ph=-log h+
=3-log 4