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m Ba(OH)2 = 17,1 gram
V = 250mL = 0,25 L
Mr Ba(OH)2 = 171 gram/mol
Dit:
pH Ba(OH)2 ?
Peny:
n = m/Mr = 17,1 gram / 171 gram/mol = 0,1 mol
[OH-] = n/V = 0,1 mol / 0,25 L = 0,4 =
4 x 10-¹
pH = - log [OH-] = - log (4 x 10-¹) = 1 - log 4
= 2.gr/mr * 1000/v
= 2. 17,1/171 * 1000/250
= 2. 0,1*4
= 2. 4*10^-1
=8*10^-1
poh= 1-log 8
ph = 13+log8