Homework Help: chem

Posted by krissy on Tuesday, January 20, 2009 at 5:40am.

quantitative determination of acetylsalicylic acid in aspirin tablets by back titration

1)why do we use a more dilute NaOH solution for the standardization of NaOH?

2)what is the rationale behind the dilution and aliquoting of the aspirin sample?

3)what are the principles behind the use of back titration in the analysis of aspirin tablet?

4)What is the importance of simmering the tablet in the NaOH solution for 20 minutes?

5)What are the possible sources of errors and their effect on calculated parameters?

chem - bobpursley, Tuesday, January 20, 2009 at 9:11am
Nearly all your answers are here, read carefully.
http://www.steljevraag.nl/viewquestion?questionID=306

Answer this Question

Related Questions

AP CHEMISTRY - What is the of a solution obtained by dissolving two extra-...
chemistry - Acetylsalicyclic Acid, HC9H704, is the active component is aspirin. ...
CHEMISTRY - 1. The use of a more dilute NaOH solution for the standardization of...
chemistry - Where can I find the answers to these questions in my text, "...
Chemistry - 1. Calculate the acetylsalicylic acid concentration (in mg/mL) of ...
College Chemistry - 1) A 25mL sample of the .265M HCI solution from the previous...
organic chemistry - Could you use NaOH to separate acetylsalicylic acid (aspirin...
Chemistry - 3) A student dissolves a 1.18g aspirin tablet in water and titrates ...
chemistry - I need some help with calculating percent yield and percent purity ...
chemistry - A 0.5130 g aspirin tablet which was dissolved in 95 percent ethanol ...

For Further Reading

First Name:
School Subject:
Answer: