Podcast
Questions and Answers
How is a stock solution typically prepared?
How is a stock solution typically prepared?
- By dissolving an unknown solid in a solvent
- By measuring out an appropriate volume of a pure liquid and diluting it to a known volume (correct)
- By randomly mixing various chemicals together
- By heating a solution to a high temperature
Which acid is recommended for dissolving metals that are above hydrogen in the electromotive series?
Which acid is recommended for dissolving metals that are above hydrogen in the electromotive series?
- Phosphoric acid
- Acetic acid
- Sulfuric acid
- Hydrochloric acid (correct)
What happens to perchloric acid when heated to drive off water?
What happens to perchloric acid when heated to drive off water?
- It becomes more basic
- It becomes less corrosive
- It becomes a strong and efficient oxidizing acid (correct)
- It becomes a neutral solution
What is dilution in the context of preparing solutions?
What is dilution in the context of preparing solutions?
Which acid is known for dissolving most common metals and destroying traces of organic matter?
Which acid is known for dissolving most common metals and destroying traces of organic matter?
Why is it advised to use perchloric acid with extreme caution?
Why is it advised to use perchloric acid with extreme caution?
What is the most commonly employed technique for the destruction of organic and biological materials for inorganic analysis?
What is the most commonly employed technique for the destruction of organic and biological materials for inorganic analysis?
Which element traces can be recovered with little loss by retention or volatilization using dry ashing?
Which element traces can be recovered with little loss by retention or volatilization using dry ashing?
In wet digestion with a mixture of nitric and sulfuric acids, what does the nitric acid primarily do?
In wet digestion with a mixture of nitric and sulfuric acids, what does the nitric acid primarily do?
What method is used to express precision in analytical measurements?
What method is used to express precision in analytical measurements?
What is the relative error range for moderately accurate analytical methods?
What is the relative error range for moderately accurate analytical methods?
What is the relationship between precision and accuracy in analytical measurements?
What is the relationship between precision and accuracy in analytical measurements?
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