Question

Answer questions regarding buret

a) What is a buret card and how is it used?

b) When using a 50 mL buret as shown in the pictures, to what decimal place should a buret be read?

c) List two ways to remove bubbles in the tip of a buret?

Answer 1

A burete is a long cylindrical tube ot uniform diameter throughout the quaduated length. It is closed at the bottom by means of a glass stop cock Abuse he is employed to deliver variable volumes of liquid . The time required for the delivery of a liquid is usually 70 70 80 seconds for a 25ml and soml burette while it is. 80-95 sec toy a 100 ml burche while using the burette, the fingures of the left hand should be kept behind the bushe and the thumb in the front and the cock should be held between the thumb and middle fingers. This ensures proper selling of the burette for its delivery > 50 ml buvettes have the highest resolution o oso ml out of so ml is all and that's about maximum precision we can use 50 ml bunelte We will use these som) burette, a.oso ml volume o.1 % accuracy throughout the site when cuscussing different aspects of Hihaton Volume can be recorded to the hundredth clecimal place. The volume dispensed by a bureHe is determined by measuring the level of solution in the bunette at the begining of the experiment and again after the appropiate amount of sol" has been the dispensed (the final reading). The difference bet these two readings comesponds to the volume actually dispensed.

20 Remove air bubbles from the tip of the buzette and the stopcock by dadining several milliliteres of tibant into a b Weaste. beaker. @ If the bubble persist, try rapidly running the titant through the burette tip. then grasp the burette and give it a bit is of a downward jesk while the stopcock is open.