Acid-base equilibria
Read our general notes on Risk Assessment
Why it is important that the same number of drops of methyl orange is used in each titration?
020608
Igloo writes ...
When you do this sort of experiment you carry out several titrations in order to be sure of obtaining a good “average” value for your titre. Ideally, one drop of liquid added from the burette causes the mixture to turn orange, i.e. an intermediate colour between the two extremes of red and yellow.
If the contents of the mixture from one titration are kept for comparison purposes, the next time you would ideally like to be able to see the same shade of orange the next time round. However, if you use more indicator the colour will be more intensely orange than it was the first time round, and so an truly accurate comparison cannot be made.
In reality, of course, any shade of orange will do, but if we are working to very high standards we would like to have the same intensity of orange colour in each flask.
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.
Rate this page or react
Share your views on this page, 0 ratings so far
updated: 08 June 2008
