CALCULATE THE REQUIRED ITEMS FOR EACH QUESTIONS! 1.PH OF THE 0.025 M C6H5NH3CL SOLUTION ?(Kx = C6H5NH2=3.8X10-20) ii.PH OF THE MIXTURE OF 0.020 M NH3 AND 0.15 M NH4CL (K: NH;= 1.8X105)? iii.IF 50 ML 0.40 M HCL S ADDED ONTO THE 40 ML 0.15 M NACN SOLUTION, WHAT IS THE FINAL PH? ( KA HCN =4.9x10-26) iv.PH OF THE 2.5X10 M HA ACID SOLUTION? (K. HA = 1.8X106)