posted by Jonny .
What is the pH at the equivalence point in a titration between 0.4450 F NH3 and 0.1520 F HCl?
NH3 + HCl ==> NH4Cl
Actually, you can't calculate a true pH of this titration without knowing how much NH3 was used at the beginning. In practice, however, the NH3 is so much stronger than the HCl that the HCl dilutes the NH4Cl formed and the difference in the formality of the NH4Cl is small. As a result, the pH changes little. Do you have a beginning amount of NH3? If not, we can assume a value and do the calculation.