Posted by Brandy on Thursday, December 8, 2011 at 10:52am.
pH = 13. Convert to pOH from
pH + pOH = pKw = 14
Then convert OH^- from
pOH = -log(OH^-).
OH^- will give you moles/L. YOu want 500 mL so you want half of that number of moles. Then moles = grams/molar mass. You know moles and molar mass NaOH, solve for grams. Something close to 2.0 g perhaps.
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