18 Questions
What is a standard solution in the context of acid and base titrations?
A solution whose concentration is accurately known.
What is a primary standard, and why is anhydrous sodium carbonate (Na2CO3) a common example?
A primary standard is a water-soluble substance that is stable and is available in pure form. Anhydrous sodium carbonate (Na2CO3) is a common primary standard because it meets these criteria.
What is the purpose of washing out the burette with DI water before use?
To remove any impurities that may affect the accuracy of the titration.
What indicator is used in the vinegar titration?
Phenolphthalein
How is the pipette filled with solution?
Using a pipette filler to bring the solution into the pipette.
Why is the conical flask washed out with DI water only?
To prevent contamination of the solution with other substances.
What is the purpose of adding a few drops of indicator to the conical flask?
To indicate the endpoint of the titration.
Why is a white tile placed under the conical flask?
To provide a clear background for viewing the color change of the indicator.
What is the purpose of washing the sides of the conical flask during titration?
To prevent any acid or alkali from being left on the sides of the flask and affecting the reaction
Why is it important to use a funnel when pouring the solution into a volumetric flask?
To prevent spills and ensure that the solution is poured accurately into the flask
What is the purpose of adding DI water to the volumetric flask using a dropper?
To ensure that the solution reaches the exact volume marked on the flask
What is the characteristic of HCl that makes it volatile?
It releases vapour when a concentrated bottle is opened
What is the purpose of using an indicator in a titration reaction?
To detect the endpoint of the reaction, marked by a colour change
Why is it necessary to dilute the bottled vinegar in the experiment?
To prevent a large percentage error, as the colour change would occur too quickly if the acid was not diluted
What is the first step in solving a vinegar titration question?
To work out the concentration of the titrated vinegar
What indicator is used in the HCl vs Sodium Carbonate titration?
Methyl Orange
What is the property of H2SO4 that makes it hydroscopic?
It absorbs water vapour from the air
State one precaution that should be taken as the end point of a titration is approaching.
Add dropwise so the endpoint will be accurately detected.
This quiz covers the steps involved in making a standard solution of anhydrous Na2CO3 and the process of titration, including washing down the sides of the conical flask and preparing the solution using a volumetric flask. It's perfect for chemistry students who want to brush up on their laboratory skills. Learn about the importance of precise measurements and accurate techniques in the laboratory.
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