Problem: A 120.0-mL buffer solution is 0.110 M in NH3 and 0.135 M in NH4Br. If the same volume of the buffer were 0.265 M in NH3 and 0.400 M in NH4Br, what mass of HCl could be handled before the pH falls below 9.00?        

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A 120.0-mL buffer solution is 0.110 M in NH3 and 0.135 M in NH4Br. If the same volume of the buffer were 0.265 M in NH3 and 0.400 M in NH4Br, what mass of HCl could be handled before the pH falls below 9.00?        

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