A 500 mL buffer solution is 0.40 M in HCOOH and 0.20 M in NaHCOO

CHEMISTRY · Single correct · A Level · Chemistry · Acids and bases · Acids and bases

Problem

A 500 mL buffer solution is 0.40 M in HCOOH and 0.20 M in NaHCOO. Which single addition would most likely exhaust the buffer toward pH increase? (a) Adding 25 mL25\,\text{mL} of 0.10 M  NaOH(aq)0.10\,\text{M}\;\text{NaOH(aq)} (b) Adding 5 mL5\,\text{mL} of 1.0 M  NaOH(aq)1.0\,\text{M}\;\text{NaOH(aq)} (c) Adding 50 mL50\,\text{mL} of 0.10 M  HCl(aq)0.10\,\text{M}\;\text{HCl(aq)} (d) Adding 5 mL5\,\text{mL} of 1.0 M  HCl(aq)1.0\,\text{M}\;\text{HCl(aq)}

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