12 Questions
How is a stock solution typically prepared?
By measuring out an appropriate volume of a pure liquid and diluting it to a known volume
Which acid is recommended for dissolving metals that are above hydrogen in the electromotive series?
Hydrochloric acid
What happens to perchloric acid when heated to drive off water?
It becomes a strong and efficient oxidizing acid
What is dilution in the context of preparing solutions?
The process of preparing a less concentrated solution from a more concentrated solution
Which acid is known for dissolving most common metals and destroying traces of organic matter?
Nitric acid
Why is it advised to use perchloric acid with extreme caution?
Because it reacts explosively with easily oxidizable substances
What is the most commonly employed technique for the destruction of organic and biological materials for inorganic analysis?
Dry Ashing with no chemical aids
Which element traces can be recovered with little loss by retention or volatilization using dry ashing?
Lead, zinc, cobalt, antimony
In wet digestion with a mixture of nitric and sulfuric acids, what does the nitric acid primarily do?
Destroys the bulk of the organic matter
What method is used to express precision in analytical measurements?
All of the above
What is the relative error range for moderately accurate analytical methods?
1% - 5%
What is the relationship between precision and accuracy in analytical measurements?
Good precision does not assure good accuracy
Learn about common laboratory procedures related to preparing solutions, including stock solutions and dilution methods. Explore how stock solutions of known concentrations are prepared and how dilution is used to create less concentrated solutions from more concentrated ones.
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