You are asked to bring the pH of 0.500L of 0.450M NH4Cl to 7.00.

Question

a) Which of the following solutions would you use: 10.0M HCl or 10.0M NH3?

I figured that one would use the 10.0M NH3

b)How many drops (1 drop 0.05mL) of this solution would you use?