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A 130.0 −mL buffer solution is 0.100 M in NH3 and 0.125 M in NH4Br. What...

A 130.0 −mL buffer solution is 0.100 M in NH3 and 0.125 M in NH4Br. What mass of HCl can this buffer neutralize before pH falls below 9.00? Please help and show work. I keep getting 2.5-2.85 g of HCl. I cannot figure this out, it keeps saying its the incorrect answer!

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queen_honey_blossom answered 2 years ago
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