1. How many mL of 0.25 M NaOH will react with 10.0 ml of 0.10 M H₂SO₄?

2. 0.4671 g sample containing NaHCO₃ (FW = 84.01 mg/mmol) was dissolved and titrated with 0.1067 M HCl requiring 40.72 mL. Find the percentage of sodium bicarbonate in the sample.

3. A 0.1876 g of pure sodium carbonate (FW = 106 mg/mmol) was titrated with approximately 0.1 M HCl requiring 35.86 ml. Find the molarity of HCl.