UPSC Combined Geo-Scientist, Mains · 2020 · Mains Paper I
Q5(b). Determining NaHCO₃ and Na₂CO₃ in a mixture
Question
Outline the principle used in the determination of NaHCO₃ and Na₂CO₃ in a mixture.
Model answer
The free solution for 2020 answers questions 1, 3, 4, 7, 8 and 10, the ones picked in its time plan. This part is not answered on the site yet. New answers are announced on Telegram.
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Coversdouble indicator titrationphenolphthalein methyl orangecarbonate bicarbonate mixture
All parts of Question 5
- 5(a) Indicator for HCl versus NH₄OH titration10 marks
- 5(b) Determining NaHCO₃ and Na₂CO₃ in a mixture10 marks
- 5(c) Gravimetric nickel with dimethylglyoxime10 marks