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Per NCERT §6.13, on DILUTING a buffer solution, what happens to the buffer pH (to first approximation)?
ADecreases
BBecomes 7
CStays the same
DIncreases
Answer & Solution
Correct answer: C. Stays the same
NCERT §6.13: ratio [A⁻]/[HA] in Henderson-Hasselbalch is unchanged on dilution, so pH is unaffected (within buffer range).
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