1.Calculate the change in ph when 5ml of 1M HCl solution is added to 1L of 100mM Tris solution at ph 8.10,pka=8.10. 2.Calculate the change in pH when 5ml of HCl is added to 1L of a 100mM Tris solution at pH 7. 10,pka=8.10.

Assuming equal concentrations of conjugate base and acid, which one of the following mixtures is best suited for preparing a buffer solution with pH of 4.74?   Question 2 options:   NH3 / NH4Cl  (Ka = 5.6 × 10–10)   NaNO2 / HNO2  (Ka = 4.5 × 10–4)   CH3COONa / CH3COOH  (Ka = 1.8 × 10–5)   NaCl / HCl   NaOCl / HOCl  (Ka = 3.2 × 10–8)

7. A solution was made by mixing 50.0 mL of 0.750 M HCN with 25.0 mL of water. What is the pH of this solution? The pka of HCN = 9.31. 8. One of the compounds featured on the TV series "Breaking Bad" was hydrofluoric acid (HF), pKa = 3.14. a) A solution of HF has a pH = 1.77. What was the initial [HF] for this solution in mol L-1? b) What is the equilibrium concentration of F in this solution in mol L-1? c) What is the percent ionization of HF in this solution?

Calculate the pH of the solution that results from each mixture.a. 150.0 mL of 0.25 M HF with 225.0 mL of 0.30 M NaFb. 175.0 mL of 0.10 M C2H5NH2 with 275.0 mL of 0.20 M C2H5NH3Cl