posted by Samuel .
A 130.0 mL buffer solution is 0.100 M in NH3 amd 0.135 M in NH3 and 0.135 M in NH4Br. What mass of HCI could this buffer neutralize before the pH fell below 9.00?
You need to work on this problem; perhaps starting over with the post. It has contradictory concns. Check it out.