Practical investigations
Read our general notes on Risk Assessment
I have analysed the content of an aspirin-containing tablet by back titration, and I found that there is difference between the experimental mass percent of CH
Igloo writes ...
A back titration provides the most accurate means of determining the concentration of aspirin, but since it involves several stages with many potential sources of error it is quite possible that your overall experimental errors are responsible for the discrepancy you have found.
Alternatively it is possible that your experimental work is perfectly satisfactory and that the tablets have partially hydrolysed to salicylic acid. Were the tablets from a freshly opened packet?
Always carry out a risk assessment and check with your teacher before starting any practical work.
Risk assessment
Before attempting any practical work based on the advice and suggestions on this website, you must do the following. Identify any hazards, assess the risks from these hazards, and then decide appropriate control measures to reduce the risks. You must have these approved by those in authority in your school or college laboratory. Do not rely on what is said on this website.
For further guidance see our tutorial on Risk Assessment.
back to Practical investigations
Rate this page or react
Share your views on this page, 0 ratings so far
updated: 14 October 2007
