1) 9.00×10-3mol of HBr are dissolved in water to make 15.0 L of solution. What is the concentration of hydroxide ions, [OH-], in this solution?
Express your answer with the appropriate units.
2) 6.00 g of NaOH are dissolved in water to make 2.00 L of solution. What is the concentration of hydronium ions, [H3O+], in this solution?
Express your answer with the appropriate units.