Podcast
Questions and Answers
How can barium hydroxide solutions be kept free from carbonates?
How can barium hydroxide solutions be kept free from carbonates?
- Absorb carbon dioxide using soda-lime absorption tubes
- Precipitate absorbed carbon dioxide as insoluble barium carbonate (correct)
- Standardize against normal sodium hydroxide solution
- Standardize titrimetrically against sodium carbonate
How should alkali solutions be prepared to ensure they are free from carbon dioxide?
How should alkali solutions be prepared to ensure they are free from carbon dioxide?
- Protect from carbon dioxide using soda-lime absorption tubes (correct)
- Standardize against pure sodium carbonate
- Standardize gravimetrically by precipitation of silver chloride
- Standardize titrimetrically against normal hydrochloric acid solution
What is a suitable method for standardizing alkali solutions like sodium hydroxide or potassium hydroxide?
What is a suitable method for standardizing alkali solutions like sodium hydroxide or potassium hydroxide?
- Titration against sodium carbonate with phenolphthalein as an indicator
- Using a standard solution of hydrochloric or sulphuric acid as a primary standard (correct)
- Precipitating an equivalent amount of silver chloride
- Standardizing against pure sodium carbonate
How is the standardization of sulfuric acid solution typically done?
How is the standardization of sulfuric acid solution typically done?
What is a primary standard that can be used to standardize alkali solutions?
What is a primary standard that can be used to standardize alkali solutions?
Why should all alkali solutions be re-standardized frequently?
Why should all alkali solutions be re-standardized frequently?
What is the purpose of using an indicator in a titration process?
What is the purpose of using an indicator in a titration process?
Why is it crucial to use carbon dioxide-free water in the preparation of 1N NaOH?
Why is it crucial to use carbon dioxide-free water in the preparation of 1N NaOH?
What does a primary standard refer to in the context of this text?
What does a primary standard refer to in the context of this text?
How is phenolphthalein used as an indicator in titrations?
How is phenolphthalein used as an indicator in titrations?
What is the endpoint observed when phenolphthalein is used as an indicator in neutralization reactions?
What is the endpoint observed when phenolphthalein is used as an indicator in neutralization reactions?
Why should sodium hydroxide pellets be dissolved in carbon dioxide-free water?
Why should sodium hydroxide pellets be dissolved in carbon dioxide-free water?
What is the formula used for calculating the weight percentage of a substance?
What is the formula used for calculating the weight percentage of a substance?
Which standard alkali solutions are commonly used in acidimetry and alkalimetry?
Which standard alkali solutions are commonly used in acidimetry and alkalimetry?
In which type of titration is hydrochloric acid preferable over sulfuric acid?
In which type of titration is hydrochloric acid preferable over sulfuric acid?
What happens to standard alkali solutions like sodium hydroxide and potassium hydroxide over time?
What happens to standard alkali solutions like sodium hydroxide and potassium hydroxide over time?
Why is sulfuric acid preferable over hydrochloric acid in hot titrations?
Why is sulfuric acid preferable over hydrochloric acid in hot titrations?
What may impair the usefulness of standard alkali solutions?
What may impair the usefulness of standard alkali solutions?
