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Verified answer
PH = 12karna ini adalah basa kuat,kita harus cari [OH-] terlebih dahulu
pH = 12
pOH = 14 - 12
pOH = 2
[OH^-] = 0,01M
[NaOH] = 0,01M
karna tidak diketahui volumenya,kita asumsikan terdapat 100mL = 0,1L
M = n/V
M = m/MrxV
m = M x Mr x V
m = 0,01mol x 40gr/mol x 0,1L
m = 0,04gram