Q3(b). CaCO₃ and MgCO₃ in dolomite by EDTA titration
How will you estimate CaCO₃ and MgCO₃ in a sample of dolomite titrimetrically? [Sequential steps for the dissolution of dolomite, outlines of necessary titrations and the basis of calculations need to be mentioned.]
Model answer
The free solution for 2021 answers questions 1, 2, 5, 6, 7 and 10, the ones picked in its time plan. Question 3 is answered in full in the Geo-Scientist Chemistry Paper III, 2021 to 2025 book, with every part of every paper.
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UPSC Combined Geo-Scientist (Main) Chemistry Paper III: Model Answers 2021 to 2025
- All ten questions of each paper, with the question printed above its answer
- Instruments drawn as labelled diagrams, numericals worked with units
- Topic-wise weightage and a topic-wise index
Coversdolomite analysisEDTA titrationcomplexometric titrationEriochrome Black Tmurexide
All parts of Question 3
- 3(a) Background correction in flame atomic absorption and emission15 marks
- 3(b) CaCO₃ and MgCO₃ in dolomite by EDTA titration15 marks