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A 130.0 −mL buffer solution is 0.105 M in NH3 and 0.135 M in NH4Br. A) What...

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Chemistry

A 130.0 −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? ​answer to this was0.088g

B) If the same volume of the buffer were 0.265 M in NH3 and0.395 M in NH4Br, what mass of HCl could be handled before the pHfell below 9.00?

Answer & Explanation Solved by verified expert
3.7 Ratings (367 Votes)
We know that pOH pKb log NH4NH3 474log01350105485 pH 14485 915 When the pH at pH 9 is pOH 1495 pOH pKb log NH4NH3 5 474log NH4NH3 NH4NH3 182 It is also equal to moles of NH4 moles of NH3 182 1 When HCl is added NH3 reacts with HCl NHaqHClaqNHClaq NH3 is consumed and NH4 is added    See Answer
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