A 2500 ml sample of 0379 m nitric acid hno3aq is titrated

Question

Identify the acid, its conjugate base, the base and its conjugate acid in the following reaction:(2 marks)

H₃PO_4(aq) + NH_3(aq)H₂PO₄^-_(aq) + NH₄⁺_(aq)

1. Because rain washes pollutants out of the air, many Ontario lakes are undergoing changes in pH. The water in one such lake was found to have a hydronium ion concentration of 3.2 x 10^-5M. What is the pH of this lake? Is it considered acidic or basic? (2 marks)
2. The pH of a sample of human blood was measured to be 7.41 at 25^oC. What is the hydroxide ion [OH^-_(aq)] concentration? (3 marks)
3. What is the pH of a sodium hydroxide solution at 25^oC in which the hydroxide ion concentration is 0.0026 mol/L? Is the solution acidic or basic?(3 marks)
4. A 0.20 M solution of hydrofluoric acid (HF_(aq)) has a pH of 3.96 at 25^oC. Calculate theK_aand Percent Ionization of hydrofluoric acid.(4 marks)

HF_(aq) + H₂O_(l)F^-_(aq) + H₃O⁺_(aq)

1. A 25.00 mL sample of 0.379 M nitric acid (HNO_3(aq)) is titrated with 12.00 mL of 0.573 M lithium hydroxide (LiOH_(aq)). Determine the amount of [H⁺_(aq)] remaining in the flask and pH of the solution after reaction.(4 marks)