the solution (after it, it is called the secondary standard solution when finished the titration, conc. known)
should be transferred accurately by using a pipette
what he meaned is the change in colour of the indicator used(end point, generally)
and, although neutralization is a fast reaction, it doesn't mean that we don't need to shake the conical flask slightly when the titration is carrying out. otherwise, the volume of standard solution used may be exaggerated or underestimated
發表於 16-5-2008 16:45:54
變色卡
