2 gram NaoH (mr= 40) dilarutkan dalam 2 liter larutan.hitung konsentrasi larutan,konsentrasi OH- dan pH larutan

konsentrasi larutan = M NaOH = massa / (volume x Mr)
M NaOH = 2 / (2 x 40)
M NaOH = 0,025 M = 2,5 x 10^-2 M

NaOH adalah basa kuat bervalensi satu

[OH-] = 1 x M NaOH
[OH-] = 1 x 2,5 x 10^-2
[OH-] = 2,5 x 10^-2 M

pOH = 2 - log2,5

pH = 14 - pOH
pH = 14 - (2 - log2,5)
pH = 12 + log2,5