Two 100 mL samples of the same buffer (0.30 M H₂CO₃ and 0.10 M HCO₃⁻) are prepared

CHEMISTRY · Subjective · A Level · Chemistry · Acids and bases · Acids and bases

Problem

Two 100 mL samples of the same buffer (0.30 M H₂CO₃ and 0.10 M HCO₃⁻) are prepared. Sample A receives 1.0 mL of 0.20 M HCl, and Sample B receives 1.0 mL of 0.20 M NaOH. Which sample’s pH will deviate more from the original value, and why?

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