原帖由 sS飄移Ss 於 16-5-2008 10:26 PM 發表
指示劑係一早加左落去先再做
滴定管用已知濃度ge溶液o係要測試要用幾多既已知濃度ge溶液去完全react曬
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 |