LAB B Flashcards
Go over any calculations from Lab
B in Workbook
.
what must you do prepare you buret
rinse 3x with distilled water and 3x with solution given
standard relative deviation formula
100x standard deviaton/mean
is standard deviation a measure of accuracy or precision
precision
what is the q test for?
-identifies and rejects outliers (only one)
-only for 4 or more data
-reason to use eg: titration to much?
learning objectives of Lab B
-titration technique
-vacuum filtration
Scientific purpose of Lab B
determine the amount of acid in vitamin C tablet
preparation of volumetric flask
rinse with D water 3 x
why do we do rough titration
to approximate the end point volume
how to identify outliers
-smallest to largest
-subtract two smallest two largest
-whatever one is larger use as gap
-range is largest minus smallest
-compare too total titration number
how can q test reject outlier
if q calculated is greater than q table then we can discard
q calculated formula
gap/range
