titrations

Question 1

errors in titrations

Answer 1

leaving in filter funnel - liquid can drip into filter funnel - lowers final volume
bubble under tap - liquid must fill space before being added to a conical flask - increases final volume
ensure a conical flask is used - to ensure no loss of liquid when swirling
not swirling constantly - chemicals not fully mixed
not washing sides of conical flask just before end point - reagents may be on side of flask not in mixture. washing with distilled water does not affect the moles in the reactant - increases titre volume

Question 2

uncertainty (%) =

Answer 2

error value/quantity measured x 100

Question 3

solution to improving titration

Answer 3

use a more dilute solution in the burette to increase volume added so % error is smaller

Question 4

dilation equation

Answer 4

moles = Cstart x Vstart = Cend x Vend