mass, m = 121 g
use:
number of mol,
n = mass/molar mass
=(1.21*10^2 g)/(56.11 g/mol)
= 2.156 mol
volume , V = 1*10^2 mL
= 0.1 L
use:
Molarity,
M = number of mol / volume in L
= 2.156/0.1
= 21.56 M
This is concentration of KOH
So,
[OH-] = 21.56 M
Given:
[OH-] = 21.56 M
use:
pOH = -log [OH-]
= -log (21.56)
= -1.3336
use:
PH = 14 - pOH
= 14 - -1.3336
= 15.3336
Answer: 15.33
Potassium hydroxide is very soluble in water, resulting in extremely basic solutions. A 121 g sample...
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