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Questions and Answers
Which reagent is used to precipitate sulfate ions in the preparation of pure sodium chloride?
Which reagent is used to precipitate sulfate ions in the preparation of pure sodium chloride?
- Barium chloride TS (correct)
- Alcohol
- Sodium carbonate
- Hydrochloric acid
What is the purpose of treating the solution with 10% sodium carbonate?
What is the purpose of treating the solution with 10% sodium carbonate?
- To remove excess barium ions
- To remove excess calcium ions (correct)
- To remove excess sodium carbonate
- To remove excess magnesium ions
What is the next step after filtering the clear solution?
What is the next step after filtering the clear solution?
- Add barium chloride TS
- Add alcohol
- Add 4 ml of 10% sodium carbonate (correct)
- Add hydrochloric acid
What is the purpose of adding hydrochloric acid to the solution?
What is the purpose of adding hydrochloric acid to the solution?
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What is the purpose of digesting the solution on a water bath?
What is the purpose of digesting the solution on a water bath?
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