Homework Help: chemistry

Posted by Brunette on Friday, November 23, 2012 at 12:56pm.

How much NaOH (g) would you need to dissolve in water in order to prepare 2.75 L of a NaOH solution in which [OH-]= 0.50 M?

chemistry - DrBob222, Friday, November 23, 2012 at 1:54pm
(OH^-) = 0.50M; therefore, NaOH = 0.5M.
How many mols do you need? That's M x L = 0.5M x 2.75L = ?
Then mols = grams/molar mass. You know molar mass and mols, solve for grams.

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