Buffers and pHBuffers and pHBuffers and pH

List all the species present in a solution of phenylamonium chloride, C6H5NH3Cl write the chemical equation.

Calculate the pH of water after the addition of 0.15 mL of 1 M NaOH. Assume the volume of the mixture is 15 mL.

Calculate the pH of water after the addition of 0.15 mL of 1 M HCl based on the known value of Ka for acetic acid