8.00g of NaOH are dissolved in water to make 4.00L of solution. What is the concentration of hydronium ions, [H3O+], in this solution?

Express your answer with the appropriate units.

1 answer

mols NaOH = grams/molar mass = ?
M NaOH = mols NaOH/L solution
(OH^-) = (NaOH)
Then (H3O^+)(OH^-) = Kw = 1E-14
Solve for (H3O^+).