1. The problem statement, all variables and given/known data Calculate the end point pH when 50 mL 0.2 mol/L HCl solution reacts exactly with 50 mL 0.2 mol/L NH3 (equivalent to NH4OH) solution. NH3 Kb=1.8x10^-5 3. The attempt at a solution I have no idea how to even attempt this question. Can someone please help me? Thanks.