Calculate the pOH and the pH of a solution in which 15.5 mL of 0.100 M HCl is added 
to 25.0 mL of 0.150 M NaOH.

3. 4. and 5. please!!!!

alculate the pOH and pH of the following aqueous solutions at 25°C.

(a) 0.025 M KOH

b) 2.71 M NaOH

(c) 0.73 M Ba(OH)₂

a) Calculate the pH of a solution which is 0.50 M CH₃NH₂ and 0.70 M CH₃NH₃Cl.

b) Suppose 0.10 moles of NaOH is added to the 1.0 L of the solution in part a). Calculate the new pH

c) Suppose 0.10 moles of HCl is added to the 1.0 L of the solution in part a). Calculate the new pH