mols NaOH = grams/molar mass = ?
Then M = molarity = mols/L solution. You know mols and L, solve for M. That will be the OH^- since NaOH is a strong electrolyte.
Convert to H^+ (H3O^+) with
(H^+)(OH^-) = Kw = 1E-14
You know Kw and OH, solve for H..
6.00 g of NaOH are dissolved in water to make 4.00 L of solution. What is the concentration of hydronium ions, [H3O+], in this solution?
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