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A 100.0 −mL buffer solution is 0.105 M in NH3 and 0.135 M in NH4Br. A. What...

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Chemistry

A 100.0 −mL buffer solution is 0.105 M in NH3 and 0.135 M inNH4Br.

A. What mass of HCl could this buffer neutralize before thepH fell below 9.00

B. If the same volume of the buffer were 0.265 M in NH3 and0.390 M in NH4Br, what mass of HCl could be handled before thepH fell below 9.00?

I know for A i have tried .19g, .0915, and .5`3 using threedifferent methods. I have no idea what to do now.

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