Q6. pH of an acetate buffer after adding NaOH
The pH of a buffer solution containing 0.5 mol/m³ of CH₃COOH and 0.5 mol/m³ of CH₃COONa has been found to be 4.76. What would be the pH of this solution after 0.02 mol/m³ NaOH has been added to the buffer? Assume that the volume is unchanged. (Given Ka = 1.80 × 10⁻⁵)
Model answer
The free solution for 2024 answers questions 1, 2, 3, 4, 5, 8, 9, 13, 14 and 15, the ones picked in its time plan. Question 6 is answered in full in the Geo-Scientist Chemistry Paper II, 2021 to 2025 book, with every part of every paper.
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UPSC Combined Geo-Scientist (Main) Chemistry Paper II: Model Answers 2021 to 2025
- All fifteen questions of each paper, with the question printed above its answer
- Numericals worked from formula to result with units; graphs with labelled axes
- Topic-wise weightage and a topic-wise index
Coversbuffer solutionHenderson–Hasselbalch equationacetate bufferpKabuffer capacity