UPSC Combined Geo-Scientist, Mains · 2019 · Mains Paper III
Q3(d). Errors from coprecipitation
Question
Explain positive and negative errors associated with coprecipitation.
Answer in brief
Entrained contaminants commonly cause a high mass result; replacement or loss of analyte can instead produce a low result.
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CoversErrors from coprecipitationGravimetric accuracy
All parts of Question 3
- 3(a) Potentiometric fluoride measurement10 marks
- 3(b) Isoelectric and isoionic points5 marks
- 3(c) Identifying and balancing redox5 marks
- 3(d) Errors from coprecipitation5 marks
- 3(e) Heavy-metal adsorption on hydrous oxides5 marks