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A 110.0 −mL buffer solution is 0.110 M in NH3 and 0.135 M in NH4Br. Part A...

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Chemistry

A 110.0 −mL buffer solution is 0.110 M in NH3 and 0.135 M inNH4Br.

Part A What mass of HCl could this buffer neutralize before thepH fell below 9.00? Express your answer using two significantfigures.

m=?

Part 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 the pHfell below 9.00? Express your answer using two significantfigures.

m=?

Answer & Explanation Solved by verified expert
4.4 Ratings (605 Votes)
pKb of NH 4744727495 Initial number of moles of NH NHvolume of buffer solution in L 0110110x10 00121 Initial number of moles of NH NHvolume of buffer solution in L 0135110x10 001485 pOH pKblogNHNH 4744727495log01350110 4853871964 0089    See Answer
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